VARIoT IoT vulnerabilities database
| VAR-201008-0279 | CVE-2010-2974 |
Wonderware Archestra ConfigurationAccessComponent Stack Buffer Overflow Vulnerability
Related entries in the VARIoT exploits database: VAR-E-201008-0050, VAR-E-201008-0051 |
CVSS V2: 9.3 CVSS V3: - Severity: HIGH |
Stack-based buffer overflow in the IConfigurationAccess interface in the Invensys Wonderware Archestra ConfigurationAccessComponent ActiveX control in Wonderware Application Server (WAS) before 3.1 SP2 P01, as used in the Wonderware Archestra Integrated Development Environment (IDE) and the InFusion Integrated Engineering Environment (IEE), allows remote attackers to execute arbitrary code via the first argument to the UnsubscribeData method. Wonderware Archestra ConfigurationAccessComponent ActiveX The control contains a buffer overflow vulnerability. The UnsubscribeData method of the IConfigurationAccess interface privately wcscpy() copies the first parameter to the static size buffer, which can trigger a buffer overflow. Successful exploitation of a vulnerability can execute arbitrary instructions with application privileges. Wonderware Archestra ConfigurationAccessComponent ActiveX control is prone to a stack-based buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data. Failed attempts will likely result in denial-of-service conditions.
The vulnerable ActiveX control is included in the following products:
Wonderware Application Server prior to 3.1 Service Pack 2 Patch 01
| VAR-201008-0190 | CVE-2010-2817 |
plural Cisco Product IKE Service disruption in (DoS) Vulnerabilities
Related entries in the VARIoT exploits database: VAR-E-201008-0896 |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the IKE implementation on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.0 before 7.0(8.11), 7.1 and 7.2 before 7.2(5), 8.0 before 8.0(5.15), 8.1 before 8.1(2.44), 8.2 before 8.2(2.10), and 8.3 before 8.3(1.1) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via a crafted IKE message, aka Bug ID CSCte46507. plural Cisco Run on product IKE The implementation of IKE Service operation disruption due to incomplete message processing (DoS) There is a vulnerability that becomes a condition. The problem is Bug ID : CSCte46507 It is a problem.Skillfully crafted by a third party IKE Service disruption via message (DoS) There is a possibility of being put into a state. Cisco ASA security appliances are prone to a remote denial-of-service vulnerability.
An attacker can exploit this issue to cause the affected device to reload, denying service to legitimate users.
This issue is documented in Cisco bug ID CSCte46507. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
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----------------------------------------------------------------------
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----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
These vulnerabilities are documented in Cisco bug IDs CSCtc77567,
CSCtc79922, and CSCtc85753; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1578, CVE-2010-1579, and CVE-2010-1580,
respectively.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TLS and its predecessor, SSL, are cryptographic protocols that
provide security for communications over IP data networks such as the
Internet. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
These vulnerabilities are documented in Cisco bug IDs CSCtd32627,
CSCtf37506, and CSCtf55259; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1581, CVE-2010-2814, and CVE-2010-2815,
respectively.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. Refer to the EOL/EOS
for the Cisco ASA 5500 Series Adaptive Security Appliance Software
v7.1 notice for further information:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/end_of_life_notice_cisco_asa_5500_series_adaptive_sec_app_sw.html
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0178 | CVE-2010-2814 | plural Cisco Product Transport Layer Security Service disruption in (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the Transport Layer Security (TLS) implementation on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.15), 8.1 before 8.1(2.44), 8.2 before 8.2(2.17), and 8.3 before 8.3(1.6) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via a sequence of crafted TLS packets, aka Bug ID CSCtf37506. The problem is Bug ID : CSCtd37506 It is a problem.Skillfully crafted by a third party TLS Denial of service through a sequence of packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause the affected device to crash and reload, denying service to legitimate users.
This issue being tracked by Cisco bug ID CSCtf37506. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
These vulnerabilities are documented in Cisco bug IDs CSCtc77567,
CSCtc79922, and CSCtc85753; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1578, CVE-2010-1579, and CVE-2010-1580,
respectively. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
These vulnerabilities are documented in Cisco bug IDs CSCtd32627,
CSCtf37506, and CSCtf55259; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1581, CVE-2010-2814, and CVE-2010-2815,
respectively.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0179 | CVE-2010-2815 | plural Cisco Product Transport Layer Security Service disruption in (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the Transport Layer Security (TLS) implementation on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.15), 8.1 before 8.1(2.44), 8.2 before 8.2(2.17), and 8.3 before 8.3(1.6) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via a sequence of crafted TLS packets, aka Bug ID CSCtf55259. The problem is Bug ID : CSCtf55259 It is a problem.Skillfully crafted by a third party TLS Denial of service through a sequence of packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause an affected device to crash and reload, denying service to legitimate users.
This issue being tracked by Cisco bug ID CSCtf55259. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
These vulnerabilities are documented in Cisco bug IDs CSCtc77567,
CSCtc79922, and CSCtc85753; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1578, CVE-2010-1579, and CVE-2010-1580,
respectively. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
These vulnerabilities are documented in Cisco bug IDs CSCtd32627,
CSCtf37506, and CSCtf55259; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1581, CVE-2010-2814, and CVE-2010-2815,
respectively.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0357 | CVE-2010-2986 | Cisco WCS Solution of webacs/QuickSearchAction.do Vulnerable to cross-site scripting |
CVSS V2: 4.3 CVSS V3: - Severity: MEDIUM |
Cross-site scripting (XSS) vulnerability in webacs/QuickSearchAction.do in the search feature in the web interface in Cisco Wireless Control System (WCS) before 6.0(194.0) and 7.x before 7.0.164 allows remote attackers to inject arbitrary web script or HTML via the searchText parameter, aka Bug ID CSCtf14288. The Cisco Wireless Control System is prone to a cross-site scripting vulnerability because the application fails to sufficiently sanitize user-supplied input.
Exploiting this vulnerability could allow an attacker to perform cross-site scripting attacks on unsuspecting users in the context of the affected website. As a result, the attacker may be able to steal cookie-based authentication credentials and launch other attacks.
Cisco Wireless Control System versions 6.0.181.0 and prior are vulnerable. ----------------------------------------------------------------------
Get tweets from Secunia
http://twitter.com/secunia
----------------------------------------------------------------------
TITLE:
Cisco Wireless Control System Cross-Site Scripting Vulnerabilities
SECUNIA ADVISORY ID:
SA40827
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40827/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40827
RELEASE DATE:
2010-08-06
DISCUSS ADVISORY:
http://secunia.com/advisories/40827/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40827/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40827
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco Wireless Control
System, which can be exploited by malicious people to conduct
cross-site scripting attacks.
1) Input passed via the "searchText" parameter to
webacs/QuickSearchAction.do is not properly sanitised before being
returned to the user. This can be exploited to execute arbitrary HTML
and script code in a user's browser session in context of an affected
site.
2) Certain unspecified input is not properly sanitised before being
returned to the user. This can be exploited to execute arbitrary HTML
and script code in a user's browser session in context of an affected
site.
3) Certain input passed to searchClientAction.do and
switchGeneralAction.do is not properly sanitised before being
returned to the user. This can be exploited to execute arbitrary HTML
and script code in a user's browser session in context of an affected
site.
SOLUTION:
Update to version 6.0.196.0 or later.
PROVIDED AND/OR DISCOVERED BY:
1) Tom Neaves
2, 3) Reported by the vendor.
ORIGINAL ADVISORY:
Cisco:
http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn7.0.html
Tom Neaves:
http://www.tomneaves.com/Cisco_Wireless_Control_System_XSS.txt
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
| VAR-201008-0201 | CVE-2010-1578 | plural Cisco Product SunRPC Service interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.19), 8.1 before 8.1(2.47), and 8.2 before 8.2(2) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via crafted SunRPC UDP packets, aka Bug ID CSCtc77567. plural Cisco Run on product SunRPC The inspection function includes SunRPC UDP Service operation disruption due to incomplete packet processing (DoS) There is a vulnerability that becomes a condition. The problem is Bug ID : CSCtc77567 It is a problem.Skillfully crafted by a third party SunRPC UDP Service disruption via packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc77567 and CSCte61710. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TLS and its predecessor, SSL, are cryptographic protocols that
provide security for communications over IP data networks such as the
Internet. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
This vulnerability is documented in Cisco bug ID CSCtd32106 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2816.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
This vulnerability is documented in Cisco bug ID CSCte46507 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2817.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. Refer to the EOL/EOS
for the Cisco ASA 5500 Series Adaptive Security Appliance Software
v7.1 notice for further information:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/end_of_life_notice_cisco_asa_5500_series_adaptive_sec_app_sw.html
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0202 | CVE-2010-1579 | plural Cisco Product SunRPC Service interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.19), 8.1 before 8.1(2.47), and 8.2 before 8.2(2) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via crafted SunRPC UDP packets, aka Bug ID CSCtc79922. plural Cisco Run on product SunRPC The inspection function includes SunRPC UDP Service operation disruption due to incomplete packet processing (DoS) There is a vulnerability that becomes a condition. The problem is Bug ID : CSCtc79922 It is a problem.Skillfully crafted by a third party SunRPC UDP Service disruption via packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc79922 and CSCte61622. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TLS and its predecessor, SSL, are cryptographic protocols that
provide security for communications over IP data networks such as the
Internet. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
This vulnerability is documented in Cisco bug ID CSCtd32106 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2816.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
This vulnerability is documented in Cisco bug ID CSCte46507 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2817.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. Refer to the EOL/EOS
for the Cisco ASA 5500 Series Adaptive Security Appliance Software
v7.1 notice for further information:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/end_of_life_notice_cisco_asa_5500_series_adaptive_sec_app_sw.html
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0203 | CVE-2010-1580 | plural Cisco Product SunRPC Service interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.19), 8.1 before 8.1(2.47), and 8.2 before 8.2(2) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via crafted SunRPC UDP packets, aka Bug ID CSCtc85753. plural Cisco Run on product SunRPC The inspection function includes SunRPC UDP Service operation disruption due to incomplete packet processing (DoS) There is a vulnerability that becomes a condition. The problem is Bug ID : CSCtc85753 It is a problem.Skillfully crafted by a third party SunRPC UDP Service disruption via packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc85753 and CSCte61662. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TLS and its predecessor, SSL, are cryptographic protocols that
provide security for communications over IP data networks such as the
Internet. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
This vulnerability is documented in Cisco bug ID CSCtd32106 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2816.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
This vulnerability is documented in Cisco bug ID CSCte46507 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-2817.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. Refer to the EOL/EOS
for the Cisco ASA 5500 Series Adaptive Security Appliance Software
v7.1 notice for further information:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/end_of_life_notice_cisco_asa_5500_series_adaptive_sec_app_sw.html
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0208 | CVE-2010-1581 | plural Cisco Product Transport Layer Security Denial of service in Japan (DoS) Vulnerability |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the Transport Layer Security (TLS) implementation on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 7.2 before 7.2(5), 8.0 before 8.0(5.15), 8.1 before 8.1(2.44), 8.2 before 8.2(2.17), and 8.3 before 8.3(1.6) and Cisco PIX Security Appliances 500 series devices allows remote attackers to cause a denial of service (device reload) via a sequence of crafted TLS packets, aka Bug ID CSCtd32627. The problem is Bug ID : CSCtd32627 Problem.Expertly crafted by a third party TLS Denial of service via sequence of packets (DoS) May be in a state.
An attacker can exploit this issue to cause an affected device to crash and reload, denying service to legitimate users.
This issue being tracked by Cisco bug ID CSCtd32627. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. This feature is enabled
for direct authentication using HTTPS with the "aaa authentication
listener https" command, as shown in the following example:
ASA(config)# aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A DoS vulnerability affects the SIP inspection feature of Cisco ASA
5500 Series Adaptive Security Appliances. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
These vulnerabilities are documented in Cisco bug IDs CSCtc77567,
CSCtc79922, and CSCtc85753; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1578, CVE-2010-1579, and CVE-2010-1580,
respectively. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
These vulnerabilities are documented in Cisco bug IDs CSCtd32627,
CSCtf37506, and CSCtf55259; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1581, CVE-2010-2814, and CVE-2010-2815,
respectively.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0189 | CVE-2010-2816 | Cisco Adaptive Security Appliances of SIP Service interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SIP inspection feature on Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 8.0 before 8.0(5.17), 8.1 before 8.1(2.45), and 8.2 before 8.2(2.13) allows remote attackers to cause a denial of service (device reload) via crafted SIP packets, aka Bug ID CSCtd32106. The problem is Bug ID : CSCtd32106 It is a problem.Skillfully crafted by a third party SIP Service disruption via packets (DoS) There is a possibility of being put into a state.
An attacker can exploit this issue to cause a vulnerable device to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug ID CSCtd32106. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco ASA 5500 Series Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA40842
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40842/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40842/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40842/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40842
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco ASA (Adaptive
Security Appliance) 5500 Series, which can be exploited by malicious
people to cause a DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages. This can be exploited to reload a
device via specially crafted UDP SunRPC packets that transit the
appliance.
3) An error in the Session Initiation Protocol (SIP) inspection
feature can be exploited to trigger an appliance reload via a
specially crafted SIP packet that transits the appliance via TCP or
UDP port 5060. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-asa:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
There are workarounds for some of the vulnerabilities disclosed in
this advisory.
This advisory is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
Note: The Cisco Firewall Services Module (FWSM) is affected by the
SunRPC DoS vulnerabilities. A separate Cisco Security Advisory has
been published to disclose the vulnerabilities that affect the FWSM. Affected versions of Cisco ASA Software
will vary depending on the specific vulnerability.
Vulnerable Products
+------------------
For specific version information, refer to the Software Versions and
Fixes section of this advisory. A successful attack may result in a sustained DoS
condition.
Versions 7.2.x, 8.0.x, 8.1.x, and 8.2.x are affected. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, issue the "show
service-policy | include sunrpc" command and confirm that output, such
as what is displayed in the following example, is returned.
ciscoasa# show service-policy | include sunrpc
Inspect: sunrpc, packet 0, drop 0, reset-drop 0
The following configuration commands are used to enable SunRPC
inspection in the Cisco ASA.
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... A
successful attack may result in a sustained DoS condition. Versions
7.2.x, 8.0.x, 8.1.x, 8.2.x, and 8.3.x are affected by one or more of
these vulnerabilities. A Cisco ASA device configured for any of the
following features is affected:
* Secure Socket Layer Virtual Private Network (SSL VPN)
* When the affected device is configured to accept Cisco Adaptive
Security Device Manager (ASDM) connections
* TLS Proxy for Encrypted Voice Inspection
* Cut-Through Proxy for Network Access when using HTTPS
SSL VPN (or WebVPN) is enabled with the "enable <interface name>"
command in "webvpn" configuration mode. SSL VPN is disabled by default.
The following configuration snippet provides an example of a SSL VPN
configuration.
webvpn
enable outside
...
ASDM access is affected by three of these vulnerabilities. To use
ASDM, the HTTPS server must be enabled to allow HTTPS connections to
the Cisco ASA. The server can be enabled using the "http server enable
[port]" command. The default port is 443. To specify hosts that can
access the HTTP server internal to the security appliance, use the
"http" command in global configuration mode.
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature was introduced in Cisco ASA
version 8.0(2) and is disabled by default.
To determine if the TLS Proxy for Encrypted Voice Inspection feature
is enabled on the device, use the show tls-proxy command, as shown in
the following example:
ciscoasa# show tls-proxy
Maximum number of sessions: 1200
TLS-Proxy 'sip_proxy': ref_cnt 1, seq# 3
Server proxy:
Trust-point: local_ccm
Client proxy:
Local dynamic certificate issuer: LOCAL-CA-SERVER
Local dynamic certificate key-pair: phone_common
Cipher suite: aes128-sha1 aes256-sha1
Run-time proxies:
Proxy 0xcbae1538: Class-map: sip_ssl, Inspect: sip
Active sess 1, most sess 3, byte 3456043
...
<output truncated>
TLS proxy supports SIP and Skinny protocols. TLS proxy for Skinny
inspection can be enabled using the "inspect skinny <skinny_map>
tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect skinny my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
Note: Secure SCCP uses TCP port 2443; however, it can be configured
to a different port.
TLS proxy for SIP inspection can be enabled using the "inspect sip
<map> tls-proxy <proxy_name>", as shown in the following example:
asa(config-pmap)# class inspection_default
asa(config-pmap-c)# inspect sip my-inspect tls-proxy my-tls-proxy
asa(config)# service-policy global_policy global
The Cisco ASA is also vulnerable when the Cut-Through Proxy for
Network Access feature is used with HTTPS. Versions 7.0.x, 7.1.x,
7.2.x are not affected. Versions 8.0.x, 8.1.x, and 8.2.x are
affected. SIP inspection is enabled by default.
To check if SIP inspection is enabled, issue the "show service-policy
| include sip" command and confirm that output, such as what is
displayed in the following example, is returned.
ciscoasa#show service-policy | include sip
Inspect: sip , packet 0, drop 0, reset-drop 0
Alternatively, an appliance that has SIP inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sip
...
!
service-policy global_policy global
Note: The service policy could also be applied to a specific
interface instead of a global configuration shown in the previous
example. IKE is not
enabled by default. If IKE is enabled, the "isakmp enable <interface
name>" command appears in the configuration.
For more information, refer to the End of Life announcement at:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5709/ps2030/end_of_life_notice_cisco_pix_525_sec_app.html
How to Determine the Running Software Version
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine whether a vulnerable version of Cisco ASA Software is
running on an appliance, administrators can issue the "show version"
command. The following example shows a Cisco ASA 5500 Series Adaptive
Security Appliance that is running software version 8.3(1):
ASA#show version | include Version
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Customers who use Cisco ASDM to manage devices can locate the
software version in the table that is displayed in the login window
or upper-left corner of the Cisco ASDM window.
Products Confirmed Not Vulnerable
+--------------------------------
With the exception of the Cisco FWSM, no other Cisco products are
currently known to be affected by these vulnerabilities. It offers firewall,
intrusion prevention system (IPS), anti-X, and VPN services. Sun RPC is used by Network File
System (NFS) and Network Information Service (NIS). Sun RPC services
can run on any port. When a client attempts to access a Sun RPC
service on a server, it must learn the port that service is running
on. The client does this by querying the port mapper process, usually
rpcbind, on the well-known port of 111.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities. These vulnerabilities can be triggered by using UDP
packets, not TCP.
These vulnerabilities are documented in Cisco bug IDs CSCtc77567,
CSCtc79922, and CSCtc85753; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1578, CVE-2010-1579, and CVE-2010-1580,
respectively.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TLS and its predecessor, SSL, are cryptographic protocols that
provide security for communications over IP data networks such as the
Internet. A
Cisco ASA device configured for SSL VPN, TLS Proxy for Encrypted
Voice Inspection, or configured to accept ASDM management connections
is vulnerable.
These vulnerabilities are documented in Cisco bug IDs CSCtd32627,
CSCtf37506, and CSCtf55259; and have been assigned Common Vulnerabilities
and Exposures (CVE) IDs CVE-2010-1581, CVE-2010-2814, and CVE-2010-2815,
respectively.
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SIP, as defined by the Internet Engineering Task Force (IETF),
enables call handling sessions, particularly two-party audio
conferences, or "calls." SIP works with SDP for call signalling. SDP
specifies the ports for the media stream. Using SIP, the Cisco ASA
can support any SIP VoIP gateways and VoIP proxy servers. To support
SIP calls through the Cisco ASA, signaling messages for the media
connection addresses, media ports, and embryonic connections for the
media must be inspected, because while the signaling is sent over a
well-known destination port (UDP/TCP 5060), the media streams are
dynamically allocated. Also, SIP embeds IP addresses in the user-data
portion of the IP packet. SIP inspection applies NAT for these
embedded IP addresses. SIP inspection is enabled
by default.
Note: Only transit traffic can trigger these vulnerabilities;
traffic that is destined to the appliance will not trigger the
vulnerabilities.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
IPsec is an IP security feature that provides robust authentication
and encryption of IP packets. IKE is a key management protocol
standard that is used in conjunction with the IPsec standard. A DoS
vulnerability exists in the IKE implementation of the Cisco ASA.
Note: Only traffic that is destined to the appliance may trigger
this vulnerability when the affected device is configured for IPsec
remote access or site-to-site VPNs.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtc77567, CSCtc79922 and CSCtc85753 - SunRPC Inspection DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32627, CSCtf37506, and CSCtf55259- Transport Layer Security (TLS) DoS Vulnerabilities
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtd32106 - Session Initiation Protocol (SIP) Inspection DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCte46507 - Crafted Internet Key Exchange (IKE) Message DoS Vulnerability
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of any of the vulnerabilities described in
this security advisory may cause the affected device to reload.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult:
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a
complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| Vulnerability | Major | First Fixed |
| | Release | Release |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| SunRPC Inspection DoS Vulnerabilities |---------+----------------|
| (CSCtc77567, CSCtc79922, and | 8.0 | 8.0(5.19) |
| CSCtc85753) |---------+----------------|
| | 8.1 | 8.1(2.46) |
| |---------+----------------|
| | 8.2 | 8.2(2) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | 7.2(5) |
| TLS DoS Vulnerabilities (CSCtd32627, |---------+----------------|
| CSCtf37506, and CSCtf55259) | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.17) |
| |---------+----------------|
| | 8.3 | 8.3(1.6) |
|----------------------------------------+---------+----------------|
| | 7.0 | Not vulnerable |
| |---------+----------------|
| | 7.1 | Not vulnerable |
| |---------+----------------|
| | 7.2 | Not vulnerable |
| SIP Inspection DoS Vulnerability |---------+----------------|
| (CSCtd32106) | 8.0 | 8.0(5.17) |
| |---------+----------------|
| | 8.1 | 8.1(2.45) |
| |---------+----------------|
| | 8.2 | 8.2(2.13) |
| |---------+----------------|
| | 8.3 | Not vulnerable |
|----------------------------------------+---------+----------------|
| | 7.0 | 7.0(8.11) |
| |---------+----------------|
| | | Vulnerable; |
| | 7.1 | migrate to |
| | | 7.2(5) |
| |---------+----------------|
| IKE Message DoS Vulnerability | 7.2 | 7.2(5) |
| (CSCte46507) |---------+----------------|
| | 8.0 | 8.0(5.15) |
| |---------+----------------|
| | 8.1 | 8.1(2.44) |
| |---------+----------------|
| | 8.2 | 8.2(2.10) |
| |---------+----------------|
| | 8.3 | 8.3(1.1) |
+-------------------------------------------------------------------+
Note: Cisco ASA Software versions 7.1.x are affected by some of the
vulnerabilities in this advisory. However, no fixed 7.1.x software
versions are planned because the 7.1.x major release has reached the
End of Software Maintenance Releases milestone. Refer to the EOL/EOS
for the Cisco ASA 5500 Series Adaptive Security Appliance Software
v7.1 notice for further information:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/end_of_life_notice_cisco_asa_5500_series_adaptive_sec_app_sw.html
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases.
+-------------------------------------------------------------------+
| Major Release | Recommended Release |
|---------------------+---------------------------------------------|
| 7.0 | 7.0(8.11) |
|---------------------+---------------------------------------------|
| 7.1 | Vulnerable; migrate to 7.2(5) |
|---------------------+---------------------------------------------|
| 7.2 | 7.2(5) |
|---------------------+---------------------------------------------|
| 8.0 | 8.0(5.19) |
|---------------------+---------------------------------------------|
| 8.1 | 8.1(2.47) |
|---------------------+---------------------------------------------|
| 8.2 | 8.2(2.17) |
|---------------------+---------------------------------------------|
| 8.3 | 8.3(2) |
+-------------------------------------------------------------------+
Software Download
~~~~~~~~~~~~~~~~~
Cisco ASA Software versions 7.0(8.11), 8.0(5.19), 8.1(2.46), and 8.2(2.17)
can be downloaded from:
http://www.cisco.com/pcgi-bin/tablebuild.pl/ASAPSIRT?psrtdcat20e2
Cisco ASA Software versions 7.2(5) and 8.3(2) can be downloaded from:
http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=279513386
Workarounds
===========
This Security Advisory describes multiple distinct vulnerabilities.
These vulnerabilities and their respective workarounds are
independent of each other. In addition to the recommendations
described below, mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-asa.shtml
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These vulnerabilities can be mitigated by disabling SunRPC inspection
if it is not required. Administrators can disable SunRPC inspection
by issuing the "no inspect sunrpc" command in class configuration
sub-mode within policy-map configuration.
Transport Layer Security (TLS) Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If SSL VPN (clientless or client-based) is not needed, it can be
disabled by issuing the "clear configure webvpn" command.
Administrators should make sure that ASDM connections are only
allowed from trusted hosts.
To identify the IP addresses from which the security appliance
accepts HTTPS connections for ASDM, configure the http command for
each trusted host address or subnet. The following example, shows how
a trusted host with IP address 192.168.1.100 is added to the
configuration:
hostname(config)# http 192.168.1.100 255.255.255.255
The TLS Proxy for Encrypted Voice Inspection feature is affected by
these vulnerabilities. This feature can be disabled if it is not
needed. Temporarily disabling the feature will mitigate these
vulnerabilities.
The Cut-Through Proxy for Network Access feature, when configured for
HTTPS, is affected by these vulnerabilities. The only workaround is
to disable the feature if not needed. To disable HTTPS Cut-Through
Proxy authentication use the "no aaa authentication listener https"
command, as shown in the following example:
ASA(config)# no aaa authentication listener https inside port 443
Session Initiation Protocol (SIP) Inspection Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This vulnerability can be mitigated by disabling SIP inspection if it
is not required. Administrators can disable SIP inspection by issuing
the "no inspect sip" command in class configuration sub-mode within
policy-map configuration.
Crafted Internet Key Exchange (IKE) Message Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are no workarounds for this vulnerability apart from disabling
IKE on the affected device. The "no crypto isakmp enable
<interface-name>" command can be used to disable IKE on a specific
interface.
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
One of the TLS DoS vulnerabilities was reported to Cisco by CERT-FI.
All the other vulnerabilities described in this advisory were found
during internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0191 | CVE-2010-2818 | Cisco FWSM of SunRPC Service operation interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on the Cisco Firewall Services Module (FWSM) with software 3.1 before 3.1(17.2), 3.2 before 3.2(16.1), 4.0 before 4.0(10.1), and 4.1 before 4.1(1.1) for Catalyst 6500 series switches and 7600 series routers allows remote attackers to cause a denial of service (device reload) via crafted SunRPC messages, aka Bug ID CSCte61710. The Cisco Firewall Services Module is a firewall service module used on multiple cisco products. The Cisco FWSM is affected by three vulnerabilities that can cause device reloads when handling specially crafted SunRPC messages when SunRPC detection is enabled. Cisco ASA 5500 Series Adaptive Security Appliances and the FWSM for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers are prone to a denial-of-service vulnerability that affects the SunRPC inspection engine.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc77567 and CSCte61710. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco Firewall Services Module Multiple Denial of Service
Vulnerabilities
SECUNIA ADVISORY ID:
SA40843
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40843/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
RELEASE DATE:
2010-08-06
DISCUSS ADVISORY:
http://secunia.com/advisories/40843/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40843/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco Firewall Services
Module (FWSM), which can be exploited by malicious people to cause a
DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages.
SOLUTION:
Update to a fixed version. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-fwsm:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
. Repeated
exploitation could result in a sustained DoS condition.
Cisco has released free software updates that address these
vulnerabilities. Workarounds are available for the vulnerabilities
disclosed in this advisory.
Note: These vulnerabilities are independent of each other. A device
may be affected by one vulnerability and not affected by another. Affected versions of Cisco FWSM Software vary
depending on the specific vulnerability.
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by these
vulnerabilities only if SunRPC inspection is enabled. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, use the "show service-policy
| include sunrpc" command and confirm that the command returns output,
as shown in the following example:
fwsm#show service-policy | include sunrpc
Inspect: sunrpc , packet 0, drop 0, reset-drop 0
Alternatively, a device that has SunRPC inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... The advisory is available
at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by this
vulnerability when configured in multi-mode (with virtual firewalls)
and with any of the following features:
* ASDM Administrative Access
* Telnet
* SSH
To verify if the FWSM is running in multiple mode, use the "show mode"
command, as shown in the following example:
FWSM(config)#show mode
Security context mode: multiple
The flash mode is the SAME as the running mode.
The following commands are used to enable the HTTPS server and allow
only hosts on the inside interface with an address in the 192.168.1.0
/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Determining Software Versions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine the version of Cisco FWSM Software that is running,
issue the "show module" command from Cisco IOS Software or Cisco
Catalyst Operating System Software to identify what modules and sub
modules are installed on the system.
The following example shows a system with a Cisco FWSM (WS-SVC-FWM-1)
installed in slot 2:
switch>show module
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 16 SFM-capable 16 port 1000mb GBIC WS-X6516-GBIC SAL06334NS9
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
3 8 Intrusion Detection System WS-SVC-IDSM-2 SAD0932089Z
4 4 SLB Application Processor Complex WS-X6066-SLB-APC SAD093004BD
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL0934888E
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 0009.11e3.ade8 to 0009.11e3.adf7 5.1 6.3(1) 8.5(0.46)RFW Ok
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
3 0014.a90c.9956 to 0014.a90c.995d 5.0 7.2(1) 5.1(6)E1 Ok
4 0014.a90c.66e6 to 0014.a90c.66ed 1.7 4.2(3) Ok
5 0013.c42e.7fe0 to 0013.c42e.7fe3 4.4 8.1(3) 12.2(18)SXF1 Ok
[...]
After locating the correct slot, issue the "show module <slot number>"
command to identify the software version that is running, as shown in
the following example:
switch>show module 2
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
[...]
The preceding example shows that the FWSM is running software version
3.2(2)10 as indicated by the column under "Sw."
Note: Recent versions of Cisco IOS Software will show the software
version of each module in the output from the "show module" command;
therefore, executing the "show module <slot number>" command is not
necessary.
If a Virtual Switching System (VSS) is used to allow two physical
Cisco Catalyst 6500 Series Switches to operate as a single logical
virtual switch, the "show module switch all" command can display the
software version of all FWSMs that belong to switch 1 and switch 2.
The output from this command will be similar to the output from the
"show module <slot number>" but will include module information for the
modules in each switch in the VSS.
Alternatively, version information can be obtained directly from the
FWSM through the show version command, as shown in the following
example:
FWSM> show version
FWSM Firewall Version 3.2(2)10
[...]
Customers who use the Cisco Adaptive Security Device Manager (ASDM)
to manage their devices can find the version of the software
displayed in the table in the login window or in the upper left
corner of the ASDM window. The version notation is similar to the
following example. The FWSM
offers firewall services with stateful packet filtering and deep
packet inspection.
Note: These vulnerabilities are only triggered by transit traffic;
traffic that is destined to the device does not trigger these
vulnerabilities.
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can partition a single FWSM into multiple virtual devices, known
as security contexts. Each context has its own security policy,
interfaces, and administrators. Multiple contexts are similar to
multiple standalone devices. Many features are supported in multiple
context mode, which includes routing tables, firewall features, and
management. The Cisco FWSM is only affected by
this vulnerability when is configured in multi-mode (with virtual
firewalls) and configured to accept Telnet, SSH or ASDM connections.
Note: A TCP three-way handshake is needed to exploit this
vulnerability. This vulnerability is only triggered by traffic that
is destined to the affected device; transit traffic does not trigger
this vulnerability.
This vulnerability is documented in Cisco bug ID CSCtg68694
and has been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2010-2821.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCte61710, CSCte61622, CSCte61662 - Passthrough traffic crashes FWSM
with SunRPC inspection
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtg68694 - FWSM may crash with certain TCP sessions in multiple mode
CVSS Base Score - 7.1
Access Vector - Network
Access Complexity - Medium
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of all the vulnerabilities described in this
security advisory may cause a reload of the affected appliance.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| | Major | First |
| Vulnerability | Release | Fixed |
| | | Release |
|--------------------------------------------+---------+------------|
| | 3.1 | 3.1(17.2) |
| |---------+------------|
| SunRPC Inspection Denial of Service | 3.2 | 3.2(16.1) |
| Vulnerabilities (CSCte61710, CSCte61622, |---------+------------|
| and CSCte61662) | 4.0 | 4.0(10.1) |
| |---------+------------|
| | 4.1 | 4.1(1.1) |
|--------------------------------------------+---------+------------|
| | 3.1 | Not |
| | | vulnerable |
| |---------+------------|
| TCP Denial of Service Vulnerability | 3.2 | 3.2(17.2) |
| (CSCtg68694) |---------+------------|
| | 4.0 | 4.0(11.1) |
| |---------+------------|
| | 4.1 | 4.1(1.2) |
+-------------------------------------------------------------------+
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases. Administrators can disable
SunRPC inspection by issuing the "no inspect sunrpc" command in class
configuration sub-mode within policy-map configuration.
The TCP DoS vulnerability can be mitigated by only allowing trusted
hosts to communicate with the FWSM via HTTPs, SSH, or Telnet. For
example, the following commands are used to enable the HTTPS server
and allow only hosts on the inside interface with an address in the
192.168.1.0/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Additional mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-fwsm.shtml
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
These vulnerabilities were found during the troubleshooting of
customer service requests and internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0192 | CVE-2010-2819 | Cisco FWSM of SunRPC Service operation interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on the Cisco Firewall Services Module (FWSM) with software 3.1 before 3.1(17.2), 3.2 before 3.2(16.1), 4.0 before 4.0(10.1), and 4.1 before 4.1(1.1) for Catalyst 6500 series switches and 7600 series routers allows remote attackers to cause a denial of service (device reload) via crafted SunRPC messages, aka Bug ID CSCte61622. The Cisco Firewall Services Module is a firewall service module used on multiple cisco products. The Cisco FWSM is affected by three vulnerabilities that can cause device reloads when handling specially crafted SunRPC messages when SunRPC detection is enabled. Cisco ASA 5500 Series Adaptive Security Appliances and the FWSM for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers are prone to a denial-of-service vulnerability that affects the Sun RPC inspection engine.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc79922 and CSCte61622. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco Firewall Services Module Multiple Denial of Service
Vulnerabilities
SECUNIA ADVISORY ID:
SA40843
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40843/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
RELEASE DATE:
2010-08-06
DISCUSS ADVISORY:
http://secunia.com/advisories/40843/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40843/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco Firewall Services
Module (FWSM), which can be exploited by malicious people to cause a
DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages.
SOLUTION:
Update to a fixed version. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-fwsm:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
. Repeated
exploitation could result in a sustained DoS condition.
Cisco has released free software updates that address these
vulnerabilities. Workarounds are available for the vulnerabilities
disclosed in this advisory.
Note: These vulnerabilities are independent of each other. A device
may be affected by one vulnerability and not affected by another. Affected versions of Cisco FWSM Software vary
depending on the specific vulnerability.
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by these
vulnerabilities only if SunRPC inspection is enabled. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, use the "show service-policy
| include sunrpc" command and confirm that the command returns output,
as shown in the following example:
fwsm#show service-policy | include sunrpc
Inspect: sunrpc , packet 0, drop 0, reset-drop 0
Alternatively, a device that has SunRPC inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... The advisory is available
at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by this
vulnerability when configured in multi-mode (with virtual firewalls)
and with any of the following features:
* ASDM Administrative Access
* Telnet
* SSH
To verify if the FWSM is running in multiple mode, use the "show mode"
command, as shown in the following example:
FWSM(config)#show mode
Security context mode: multiple
The flash mode is the SAME as the running mode.
The following commands are used to enable the HTTPS server and allow
only hosts on the inside interface with an address in the 192.168.1.0
/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Determining Software Versions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine the version of Cisco FWSM Software that is running,
issue the "show module" command from Cisco IOS Software or Cisco
Catalyst Operating System Software to identify what modules and sub
modules are installed on the system.
The following example shows a system with a Cisco FWSM (WS-SVC-FWM-1)
installed in slot 2:
switch>show module
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 16 SFM-capable 16 port 1000mb GBIC WS-X6516-GBIC SAL06334NS9
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
3 8 Intrusion Detection System WS-SVC-IDSM-2 SAD0932089Z
4 4 SLB Application Processor Complex WS-X6066-SLB-APC SAD093004BD
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL0934888E
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 0009.11e3.ade8 to 0009.11e3.adf7 5.1 6.3(1) 8.5(0.46)RFW Ok
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
3 0014.a90c.9956 to 0014.a90c.995d 5.0 7.2(1) 5.1(6)E1 Ok
4 0014.a90c.66e6 to 0014.a90c.66ed 1.7 4.2(3) Ok
5 0013.c42e.7fe0 to 0013.c42e.7fe3 4.4 8.1(3) 12.2(18)SXF1 Ok
[...]
After locating the correct slot, issue the "show module <slot number>"
command to identify the software version that is running, as shown in
the following example:
switch>show module 2
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
[...]
The preceding example shows that the FWSM is running software version
3.2(2)10 as indicated by the column under "Sw."
Note: Recent versions of Cisco IOS Software will show the software
version of each module in the output from the "show module" command;
therefore, executing the "show module <slot number>" command is not
necessary.
If a Virtual Switching System (VSS) is used to allow two physical
Cisco Catalyst 6500 Series Switches to operate as a single logical
virtual switch, the "show module switch all" command can display the
software version of all FWSMs that belong to switch 1 and switch 2.
The output from this command will be similar to the output from the
"show module <slot number>" but will include module information for the
modules in each switch in the VSS.
Alternatively, version information can be obtained directly from the
FWSM through the show version command, as shown in the following
example:
FWSM> show version
FWSM Firewall Version 3.2(2)10
[...]
Customers who use the Cisco Adaptive Security Device Manager (ASDM)
to manage their devices can find the version of the software
displayed in the table in the login window or in the upper left
corner of the ASDM window. The version notation is similar to the
following example. The FWSM
offers firewall services with stateful packet filtering and deep
packet inspection.
Note: These vulnerabilities are only triggered by transit traffic;
traffic that is destined to the device does not trigger these
vulnerabilities.
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can partition a single FWSM into multiple virtual devices, known
as security contexts. Each context has its own security policy,
interfaces, and administrators. Multiple contexts are similar to
multiple standalone devices. Many features are supported in multiple
context mode, which includes routing tables, firewall features, and
management. The Cisco FWSM is only affected by
this vulnerability when is configured in multi-mode (with virtual
firewalls) and configured to accept Telnet, SSH or ASDM connections.
Note: A TCP three-way handshake is needed to exploit this
vulnerability. This vulnerability is only triggered by traffic that
is destined to the affected device; transit traffic does not trigger
this vulnerability.
This vulnerability is documented in Cisco bug ID CSCtg68694
and has been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2010-2821.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCte61710, CSCte61622, CSCte61662 - Passthrough traffic crashes FWSM
with SunRPC inspection
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtg68694 - FWSM may crash with certain TCP sessions in multiple mode
CVSS Base Score - 7.1
Access Vector - Network
Access Complexity - Medium
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of all the vulnerabilities described in this
security advisory may cause a reload of the affected appliance.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| | Major | First |
| Vulnerability | Release | Fixed |
| | | Release |
|--------------------------------------------+---------+------------|
| | 3.1 | 3.1(17.2) |
| |---------+------------|
| SunRPC Inspection Denial of Service | 3.2 | 3.2(16.1) |
| Vulnerabilities (CSCte61710, CSCte61622, |---------+------------|
| and CSCte61662) | 4.0 | 4.0(10.1) |
| |---------+------------|
| | 4.1 | 4.1(1.1) |
|--------------------------------------------+---------+------------|
| | 3.1 | Not |
| | | vulnerable |
| |---------+------------|
| TCP Denial of Service Vulnerability | 3.2 | 3.2(17.2) |
| (CSCtg68694) |---------+------------|
| | 4.0 | 4.0(11.1) |
| |---------+------------|
| | 4.1 | 4.1(1.2) |
+-------------------------------------------------------------------+
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases. Administrators can disable
SunRPC inspection by issuing the "no inspect sunrpc" command in class
configuration sub-mode within policy-map configuration.
The TCP DoS vulnerability can be mitigated by only allowing trusted
hosts to communicate with the FWSM via HTTPs, SSH, or Telnet. For
example, the following commands are used to enable the HTTPS server
and allow only hosts on the inside interface with an address in the
192.168.1.0/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Additional mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-fwsm.shtml
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
These vulnerabilities were found during the troubleshooting of
customer service requests and internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0193 | CVE-2010-2820 | Cisco FWSM of SunRPC Service operation interruption in inspection function (DoS) Vulnerabilities |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
Unspecified vulnerability in the SunRPC inspection feature on the Cisco Firewall Services Module (FWSM) with software 3.1 before 3.1(17.2), 3.2 before 3.2(16.1), 4.0 before 4.0(10.1), and 4.1 before 4.1(1.1) for Catalyst 6500 series switches and 7600 series routers allows remote attackers to cause a denial of service (device reload) via crafted SunRPC messages, aka Bug ID CSCte61662. The Cisco Firewall Services Module is a firewall service module used on multiple cisco products. The Cisco FWSM is affected by three vulnerabilities that can cause device reloads when handling specially crafted SunRPC messages when SunRPC detection is enabled. Cisco ASA 5500 Series Adaptive Security Appliances and the FWSM for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers are prone to a denial-of-service vulnerability that affects the Sun RPC inspection engine.
An attacker can exploit this issue to cause affected devices to reload, triggering a denial-of-service condition.
This issue is tracked by Cisco Bug IDs CSCtc85753 and CSCte61662. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Cisco Firewall Services Module Multiple Denial of Service
Vulnerabilities
SECUNIA ADVISORY ID:
SA40843
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40843/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
RELEASE DATE:
2010-08-06
DISCUSS ADVISORY:
http://secunia.com/advisories/40843/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40843/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40843
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Some vulnerabilities have been reported in Cisco Firewall Services
Module (FWSM), which can be exploited by malicious people to cause a
DoS (Denial of Service).
1) Three errors exist in the SunRPC inspection engine while
processing certain SunRPC messages.
SOLUTION:
Update to a fixed version. Please see the vendor's advisory for
detailed patch information.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.
ORIGINAL ADVISORY:
cisco-sa-20100804-fwsm:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
. Repeated
exploitation could result in a sustained DoS condition.
Cisco has released free software updates that address these
vulnerabilities. Workarounds are available for the vulnerabilities
disclosed in this advisory.
Note: These vulnerabilities are independent of each other. A device
may be affected by one vulnerability and not affected by another. Affected versions of Cisco FWSM Software vary
depending on the specific vulnerability.
SunRPC Inspection Denial of Service Vulnerabilities
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by these
vulnerabilities only if SunRPC inspection is enabled. SunRPC
inspection is enabled by default.
To check if SunRPC inspection is enabled, use the "show service-policy
| include sunrpc" command and confirm that the command returns output,
as shown in the following example:
fwsm#show service-policy | include sunrpc
Inspect: sunrpc , packet 0, drop 0, reset-drop 0
Alternatively, a device that has SunRPC inspection enabled has a
configuration similar to the following:
class-map inspection_default
match default-inspection-traffic
!
policy-map global_policy
class inspection_default
...
inspect sunrpc
... The advisory is available
at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-asa.shtml
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cisco FWSM Software version 3.x and 4.x are affected by this
vulnerability when configured in multi-mode (with virtual firewalls)
and with any of the following features:
* ASDM Administrative Access
* Telnet
* SSH
To verify if the FWSM is running in multiple mode, use the "show mode"
command, as shown in the following example:
FWSM(config)#show mode
Security context mode: multiple
The flash mode is the SAME as the running mode.
The following commands are used to enable the HTTPS server and allow
only hosts on the inside interface with an address in the 192.168.1.0
/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Determining Software Versions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To determine the version of Cisco FWSM Software that is running,
issue the "show module" command from Cisco IOS Software or Cisco
Catalyst Operating System Software to identify what modules and sub
modules are installed on the system.
The following example shows a system with a Cisco FWSM (WS-SVC-FWM-1)
installed in slot 2:
switch>show module
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 16 SFM-capable 16 port 1000mb GBIC WS-X6516-GBIC SAL06334NS9
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
3 8 Intrusion Detection System WS-SVC-IDSM-2 SAD0932089Z
4 4 SLB Application Processor Complex WS-X6066-SLB-APC SAD093004BD
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL0934888E
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 0009.11e3.ade8 to 0009.11e3.adf7 5.1 6.3(1) 8.5(0.46)RFW Ok
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
3 0014.a90c.9956 to 0014.a90c.995d 5.0 7.2(1) 5.1(6)E1 Ok
4 0014.a90c.66e6 to 0014.a90c.66ed 1.7 4.2(3) Ok
5 0013.c42e.7fe0 to 0013.c42e.7fe3 4.4 8.1(3) 12.2(18)SXF1 Ok
[...]
After locating the correct slot, issue the "show module <slot number>"
command to identify the software version that is running, as shown in
the following example:
switch>show module 2
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
2 6 Firewall Module WS-SVC-FWM-1 SAD10360485
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
2 0018.ba41.5092 to 0018.ba41.5099 4.0 7.2(1) 3.2(2)10 Ok
[...]
The preceding example shows that the FWSM is running software version
3.2(2)10 as indicated by the column under "Sw."
Note: Recent versions of Cisco IOS Software will show the software
version of each module in the output from the "show module" command;
therefore, executing the "show module <slot number>" command is not
necessary.
If a Virtual Switching System (VSS) is used to allow two physical
Cisco Catalyst 6500 Series Switches to operate as a single logical
virtual switch, the "show module switch all" command can display the
software version of all FWSMs that belong to switch 1 and switch 2.
The output from this command will be similar to the output from the
"show module <slot number>" but will include module information for the
modules in each switch in the VSS.
Alternatively, version information can be obtained directly from the
FWSM through the show version command, as shown in the following
example:
FWSM> show version
FWSM Firewall Version 3.2(2)10
[...]
Customers who use the Cisco Adaptive Security Device Manager (ASDM)
to manage their devices can find the version of the software
displayed in the table in the login window or in the upper left
corner of the ASDM window. The version notation is similar to the
following example. The FWSM
offers firewall services with stateful packet filtering and deep
packet inspection.
Note: These vulnerabilities are only triggered by transit traffic;
traffic that is destined to the device does not trigger these
vulnerabilities.
TCP Denial of Service Vulnerability
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can partition a single FWSM into multiple virtual devices, known
as security contexts. Each context has its own security policy,
interfaces, and administrators. Multiple contexts are similar to
multiple standalone devices. Many features are supported in multiple
context mode, which includes routing tables, firewall features, and
management. The Cisco FWSM is only affected by
this vulnerability when is configured in multi-mode (with virtual
firewalls) and configured to accept Telnet, SSH or ASDM connections.
Note: A TCP three-way handshake is needed to exploit this
vulnerability. This vulnerability is only triggered by traffic that
is destined to the affected device; transit traffic does not trigger
this vulnerability.
This vulnerability is documented in Cisco bug ID CSCtg68694
and has been assigned Common Vulnerabilities and Exposures (CVE) ID
CVE-2010-2821.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCte61710, CSCte61622, CSCte61662 - Passthrough traffic crashes FWSM
with SunRPC inspection
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
CSCtg68694 - FWSM may crash with certain TCP sessions in multiple mode
CVSS Base Score - 7.1
Access Vector - Network
Access Complexity - Medium
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of all the vulnerabilities described in this
security advisory may cause a reload of the affected appliance.
Repeated exploitation could result in a sustained DoS condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
+-------------------------------------------------------------------+
| | Major | First |
| Vulnerability | Release | Fixed |
| | | Release |
|--------------------------------------------+---------+------------|
| | 3.1 | 3.1(17.2) |
| |---------+------------|
| SunRPC Inspection Denial of Service | 3.2 | 3.2(16.1) |
| Vulnerabilities (CSCte61710, CSCte61622, |---------+------------|
| and CSCte61662) | 4.0 | 4.0(10.1) |
| |---------+------------|
| | 4.1 | 4.1(1.1) |
|--------------------------------------------+---------+------------|
| | 3.1 | Not |
| | | vulnerable |
| |---------+------------|
| TCP Denial of Service Vulnerability | 3.2 | 3.2(17.2) |
| (CSCtg68694) |---------+------------|
| | 4.0 | 4.0(11.1) |
| |---------+------------|
| | 4.1 | 4.1(1.2) |
+-------------------------------------------------------------------+
Recommended Releases
~~~~~~~~~~~~~~~~~~~~
The following table lists all recommended releases. These recommended
releases contain the fixes for all vulnerabilities in this advisory.
Cisco recommends upgrading to a release that is equal to or later
than these recommended releases. Administrators can disable
SunRPC inspection by issuing the "no inspect sunrpc" command in class
configuration sub-mode within policy-map configuration.
The TCP DoS vulnerability can be mitigated by only allowing trusted
hosts to communicate with the FWSM via HTTPs, SSH, or Telnet. For
example, the following commands are used to enable the HTTPS server
and allow only hosts on the inside interface with an address in the
192.168.1.0/24 network to create ASDM, SSH or Telnet connections:
asa(config)# http server enable
asa(config)# http 192.168.1.0 255.255.255.0 inside
asa(config)# telnet 192.168.1.0 255.255.255.0 inside
asa(config)# ssh 192.168.1.0 255.255.255.0 inside
Additional mitigation techniques that can be deployed on Cisco
devices within the network are available in the Cisco Applied
Mitigation Bulletin companion document for this advisory:
http://www.cisco.com/warp/public/707/cisco-amb-20100804-fwsm.shtml
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at:
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tac@cisco.com
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
These vulnerabilities were found during the troubleshooting of
customer service requests and internal testing.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100804-fwsm.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
* cust-security-announce@cisco.com
* first-bulletins@lists.first.org
* bugtraq@securityfocus.com
* vulnwatch@vulnwatch.org
* cisco@spot.colorado.edu
* cisco-nsp@puck.nether.net
* full-disclosure@lists.grok.org.uk
* comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+---------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-August-04 | public |
| | | release. |
+---------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:
http://www.cisco.com/go/psirt
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| VAR-201008-0393 | No CVE | Novell ZENworks Remote Management Password Security Bypass Vulnerability |
CVSS V2: 9.0 CVSS V3: - Severity: HIGH |
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell ZENWorks Remote Management. Access to a single node with Remote Management client installed and configured is required.The specific flaw exists within the storage of Remote Management authentication information on the client. The client utilizes a password stored in the registry that is common among all nodes. This can be exploited by an attacker to execute remote code on any target with the client installed. Novell ZENworks Configuration Management is a desktop management software that helps customers reduce their IT ownership costs. Novell ZENworks Server and desktop management have security vulnerabilities that allow malicious users to bypass some security restrictions. Novell ZENworks is prone to a security-bypass vulnerability.
The following applications are vulnerable:
Novell ZENworks for Servers 3.0.2
Novell ZENworks for Desktops 4
Novell ZENworks for Desktops 4.0.1
Novell ZENworks Server Management 7.ZSM7 SP1
Novell ZENworks Desktop Management 7.ZDM7 SP1. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Novell ZENworks Remote Management Password Authentication Security
Issue
SECUNIA ADVISORY ID:
SA40838
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40838/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40838
RELEASE DATE:
2010-08-05
DISCUSS ADVISORY:
http://secunia.com/advisories/40838/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40838/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40838
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
A security issue has been reported in Novell ZENworks Server and
Desktop Management, which can be exploited by malicious people to
bypass certain security restrictions. when a common password has been distributed
via NAL or TED).
SOLUTION:
The vendor recommends disabling password mode of authentication in
the Remote Management policy (disabled by default). Alternatively,
the vendor suggests to only distribute a common password via NAL or
TED in trusted environments.
PROVIDED AND/OR DISCOVERED BY:
The vendor credits TippingPoint ZDI.
ORIGINAL ADVISORY:
Novell:
http://www.novell.com/support/viewContent.do?externalId=7006557&sliceId=1
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
.
-- Vendor Response:
Novell has issued an update to correct this vulnerability. More
details can be found at:
http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=7006557&sliceId=1&docTypeID=DT_TID_1_1&dialogID=80488553&stateId=1%200%2080486291
-- Disclosure Timeline:
2010-06-07 - Vulnerability reported to vendor
2010-08-09 - Coordinated public release of advisory
-- Credit:
This vulnerability was discovered by:
* sb
-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.
Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:
http://www.zerodayinitiative.com
The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.
Our vulnerability disclosure policy is available online at:
http://www.zerodayinitiative.com/advisories/disclosure_policy/
Follow the ZDI on Twitter:
http://twitter.com/thezdi
| VAR-201008-0398 | No CVE | D-Link WBR-2310 Web Server HTTP GET Request Remote Buffer Overflow Vulnerability |
CVSS V2: - CVSS V3: - Severity: - |
D-Link WBR-2310 is a wireless router device. D-Link WBR-2310 Web Server incorrectly filters specially constructed GET requests. Remote attackers can use the vulnerability to perform denial of service attacks on service programs. D-Link WBR-2310 is prone to a remote buffer-overflow vulnerability because it fails to bounds-check user-supplied input before copying it into an insufficiently sized memory buffer. This issue occurs in the device's webserver.
D-Link WBR-2310 firmware version 1.04 is vulnerable; other versions may also be affected
| VAR-201008-0272 | CVE-2010-2967 | Wind River VxWorks loginDefaultEncrypt Algorithm encryption problem vulnerability |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
The loginDefaultEncrypt algorithm in loginLib in Wind River VxWorks before 6.9 does not properly support a large set of distinct possible passwords, which makes it easier for remote attackers to obtain access via a (1) telnet, (2) rlogin, or (3) FTP session. It is relatively easy to find a string that has the same hash value as a regular password.Authentication by attacker API (loginLib) May be used to access services using. The hashing algorithm that is used in the standard authentication API for VxWorks is susceptible to collisions. An attacker can brute force a password by guessing a string that produces the same hash as a legitimate password. VxWorks is prone to a security vulnerability due to an insecure-hashing algorithm.
The issue affects multiple products from multiple vendors that ship with the VxWorks operating system.
NOTE: This document previously covered two vulnerabilities in VxWorks. The remote security-bypass issue has been moved to BID 42158 (VxWorks Debugging Service Security-Bypass Vulnerability) to allow for better documentation of both issues.
This flaw occurs due to an insecure password hashing implementation in
the authentication library (loginLib) of the VxWorks operating system.
Regardless of what password is set for a particular account, there are a
only small number (~210k) of possible hash outputs. Typical passwords
consisting of alphanumeric characters and symbols fall within an even
smaller range of hash outputs (~8k), making this trivial to brute force
over the network. To excaberate matters, loginLib has no support for
account lockouts and the FTP daemon does not disconnect clients that
consistently fail to authenticate. This reduces the brute force time for
the FTP service to approximately 30 minutes.
To demonstrate the hash weakness, the password of "insecure" hashes to
the value "Ry99dzRcy9". The password of "s{{{{{^O" also hashes to the
same output. The hashing algorithm itself is based on an additive sum
with a small XOR operation. The resulting sums are then transformed to a
printable string, but the range of possible intermediate values is
limited and mostly sequential. The entire collision table has been
precomputed and will be released in early September as an input file for
common brute force tools. More information about the hashing algorithm
itself is available at the Metasploit blog post below:
http://blog.metasploit.com/2010/08/vxworks-vulnerabilities.html
There are three requirements for this vulnerability to be exploited:
* The device must be running at least one service that uses loginLib
for authentication. Telnet and FTP do so by default.
* A valid username must be known to the attacker. This is usually easy
to determine through product manuals or a cursory review of the firmware
binaries.
* The target service must be using with default loginLib library and
must not have changed the authentication function to point to a custom
backend.
A typical VxWorks device will meet all three requirements by default,
but customization by the device manufacturer may preclude this from
being exploited. In general, if the device displays a VxWorks banner for
Telnet or FTP, it is more than likely vulnerable.
-- Vendor Response:
Wind River Systems has notified their customers of the issue and
suggested that each downstream vendor replace the existing hash
implementation with SHA512 or SHA256. The exact extent of the
vulnerability and the complete list of affected devices is not known at
this time. Example code from Wind River Systems has been supplied to
CERT and is included in the advisory below:
http://www.kb.cert.org/vuls/id/840249
-- Disclosure Timeline:
2009-06-02 - Vulnerability reported to CERT for vendor notification
2009-08-02 - Coordinated public release of advisory
-- Credit:
This vulnerability was discovered by HD Moore
-- About Rapid7 Security
Rapid7 provides vulnerability management, compliance and penetration
testing solutions for Web application, network and database security. In
addition to developing the NeXpose Vulnerability Management system,
Rapid7 manages the Metasploit Project and is the primary sponsor of the
W3AF web assessment tool.
Our vulnerability disclosure policy is available online at:
http://www.rapid7.com/disclosure.jsp
| VAR-201008-1004 | CVE-2010-2967 | Wind River VxWorks loginDefaultEncrypt Algorithm encryption problem vulnerability |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
The loginDefaultEncrypt algorithm in loginLib in Wind River VxWorks before 6.9 does not properly support a large set of distinct possible passwords, which makes it easier for remote attackers to obtain access via a (1) telnet, (2) rlogin, or (3) FTP session. Some products based on VxWorks have the WDB target agent debug service enabled by default. This service provides read/write access to the device's memory and allows functions to be called. The VxWorks WDB target agent is a target-resident, run-time facility that is required for connecting host tools to a VxWorks target system during development. WDB is a selectable component in the VxWorks configuration and is enabled by default. The WDB debug agent access is not secured and does provide a security hole in a deployed system. It is advisable for production systems to reconfigure VxWorks with only those components needed for deployed operation and to build it as the appropriate type of system image. It is recommended to remove host development components such as the WDB target agent and debugging components (INCLUDE_WDB and INCLUDE_DEBUG) as well as other operating system components that are not required to support customer applications. Consult the VxWorks Kernel Programmer's guide for more information on WDB.Additional information can be found in ICS-CERT advisory ICSA-10-214-01 and on the Metasploit Blog. An attacker can use the debug service to fully compromise the device. The hashing algorithm that is used in the standard authentication API for VxWorks is susceptible to collisions. An attacker can brute force a password by guessing a string that produces the same hash as a legitimate password. VxWorks is an embedded real-time operating system. VxWorks has multiple security vulnerabilities that allow an attacker to bypass security restrictions and gain unauthorized access to the system. For example, when logging in with the default 'target/password', 'y{{{{{SS' will HASH out the same result as 'password'. So you can use 'password' and 'y{{{{{SS' as the password to log in. Vendor affected: TP-Link (http://tp-link.com)
Products affected:
* All TP-Link VxWorks-based devices (confirmed by vendor)
* All "2-series" switches (confirmed by vendor)
* TL-SG2008 semi-managed switch (confirmed by vendor)
* TL-SG2216 semi-managed switch (confirmed by vendor)
* TL-SG2424 semi-managed switch (confirmed by vendor)
* TL-SG2424P semi-managed switch (confirmed by vendor)
* TL-SG2452 semi-managed switch (confirmed by vendor)
Vulnerabilities:
* All previously-reported VxWorks vulnerabilities from 6.6.0 on;
at the very least:
* CVE-2013-0716 (confirmed by vendor)
* CVE-2013-0715 (confirmed by vendor)
* CVE-2013-0714 (confirmed by vendor)
* CVE-2013-0713 (confirmed by vendor)
* CVE-2013-0712 (confirmed by vendor)
* CVE-2013-0711 (confirmed by vendor)
* CVE-2010-2967 (confirmed by vendor)
* CVE-2010-2966 (confirmed by vendor)
* CVE-2008-2476 (confirmed by vendor)
* SSLv2 is available and cannot be disabled unless HTTPS is
completely disabled (allows downgrade attacks)
(confirmed by vendor)
* SSL (v2, v3) offers insecure cipher suites and HMACs which cannot
be disabled (allows downgrade attacks)
(confirmed by vendor)
Design flaws:
* Telnet is available and cannot be disabled (confirmed by vendor)
* SSHv1 enabled by default if SSH is enabled (confirmed by vendor)
Vendor response:
TP-Link are not convinced that these flaws should be repaired.
TP-Link's Internet presence -- or at least DNS -- is available only
intermittently. Most emails bounced. Lost contact with vendor, but
did confirm that development lead is now on holiday and will not
return for at least a week.
Initial vendor reaction was to recommend purchase of "3-series"
switches. Vendor did not offer reasons why "3-series" switches would
be more secure, apart from lack of telnet service. Vendor confirmed
that no development time can be allocated to securing "2-series"
product and all focus has shifted to newer products.
(TL-SG2008 first product availability July 2014...)
Vendor deeply confused about security of DES/3DES, MD5, claimed that
all security is relative. ("...[E]ven SHA-1 can be cracked, they just
have different security level.")
Fix availability:
None.
Work-arounds advised:
None possible. Remove products from network. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Rockwell Automation 1756-ENBT Series A VxWorks Debugger Vulnerability
SECUNIA ADVISORY ID:
SA40829
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40829/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40829
RELEASE DATE:
2010-08-04
DISCUSS ADVISORY:
http://secunia.com/advisories/40829/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40829/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40829
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
A vulnerability has been reported in Rockwell Automation 1756-ENBT
series A, which can be exploited by malicious people to compromise
the vulnerable device.
The vulnerability is caused due to the VxWorks debug agent being
enabled, which can be exploited to gain control over the device by
e.g. sending specially crafted requests to port 17185/UDP.
The vulnerability is reported in Rockwell Automation 1756-ENBT series
A running firmware versions 3.2.6 and 3.6.1.
SOLUTION:
See Rockwell Automation Technote #69735.
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
PROVIDED AND/OR DISCOVERED BY:
Reported in VxWorks by Bennett Todd, Shawn Merdinger, and HD Moore.
ORIGINAL ADVISORY:
US-CERT VU#362332:
http://www.kb.cert.org/vuls/id/362332
http://www.kb.cert.org/vuls/id/MAPG-86FPQL
HD Moore:
http://blog.metasploit.com/2010/08/vxworks-vulnerabilities.html
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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| VAR-201008-1003 | CVE-2010-2966 | Wind River VxWorks INCLUDE_SECURITY Feature Trust Management Vulnerability |
CVSS V2: 7.8 CVSS V3: - Severity: HIGH |
The INCLUDE_SECURITY functionality in Wind River VxWorks 6.x, 5.x, and earlier uses the LOGIN_USER_NAME and LOGIN_USER_PASSWORD (aka LOGIN_PASSWORD) parameters to create hardcoded credentials, which makes it easier for remote attackers to obtain access via a (1) telnet, (2) rlogin, or (3) FTP session. Some products based on VxWorks have the WDB target agent debug service enabled by default. This service provides read/write access to the device's memory and allows functions to be called. The VxWorks WDB target agent is a target-resident, run-time facility that is required for connecting host tools to a VxWorks target system during development. WDB is a selectable component in the VxWorks configuration and is enabled by default. The WDB debug agent access is not secured and does provide a security hole in a deployed system. It is advisable for production systems to reconfigure VxWorks with only those components needed for deployed operation and to build it as the appropriate type of system image. It is recommended to remove host development components such as the WDB target agent and debugging components (INCLUDE_WDB and INCLUDE_DEBUG) as well as other operating system components that are not required to support customer applications. Consult the VxWorks Kernel Programmer's guide for more information on WDB.Additional information can be found in ICS-CERT advisory ICSA-10-214-01 and on the Metasploit Blog. An attacker can use the debug service to fully compromise the device. The hashing algorithm that is used in the standard authentication API for VxWorks is susceptible to collisions. An attacker can brute force a password by guessing a string that produces the same hash as a legitimate password. VxWorks is an embedded real-time operating system. VxWorks has multiple security vulnerabilities that allow an attacker to bypass security restrictions and gain unauthorized access to the system. For example, when logging in with the default 'target/password', 'y{{{{{SS' will HASH out the same result as 'password'. So you can use 'password' and 'y{{{{{SS' as the password to log in. Vendor affected: TP-Link (http://tp-link.com)
Products affected:
* All TP-Link VxWorks-based devices (confirmed by vendor)
* All "2-series" switches (confirmed by vendor)
* TL-SG2008 semi-managed switch (confirmed by vendor)
* TL-SG2216 semi-managed switch (confirmed by vendor)
* TL-SG2424 semi-managed switch (confirmed by vendor)
* TL-SG2424P semi-managed switch (confirmed by vendor)
* TL-SG2452 semi-managed switch (confirmed by vendor)
Vulnerabilities:
* All previously-reported VxWorks vulnerabilities from 6.6.0 on;
at the very least:
* CVE-2013-0716 (confirmed by vendor)
* CVE-2013-0715 (confirmed by vendor)
* CVE-2013-0714 (confirmed by vendor)
* CVE-2013-0713 (confirmed by vendor)
* CVE-2013-0712 (confirmed by vendor)
* CVE-2013-0711 (confirmed by vendor)
* CVE-2010-2967 (confirmed by vendor)
* CVE-2010-2966 (confirmed by vendor)
* CVE-2008-2476 (confirmed by vendor)
* SSLv2 is available and cannot be disabled unless HTTPS is
completely disabled (allows downgrade attacks)
(confirmed by vendor)
* SSL (v2, v3) offers insecure cipher suites and HMACs which cannot
be disabled (allows downgrade attacks)
(confirmed by vendor)
Design flaws:
* Telnet is available and cannot be disabled (confirmed by vendor)
* SSHv1 enabled by default if SSH is enabled (confirmed by vendor)
Vendor response:
TP-Link are not convinced that these flaws should be repaired.
TP-Link's Internet presence -- or at least DNS -- is available only
intermittently. Most emails bounced. Lost contact with vendor, but
did confirm that development lead is now on holiday and will not
return for at least a week.
Initial vendor reaction was to recommend purchase of "3-series"
switches. Vendor did not offer reasons why "3-series" switches would
be more secure, apart from lack of telnet service. Vendor confirmed
that no development time can be allocated to securing "2-series"
product and all focus has shifted to newer products.
(TL-SG2008 first product availability July 2014...)
Vendor deeply confused about security of DES/3DES, MD5, claimed that
all security is relative. ("...[E]ven SHA-1 can be cracked, they just
have different security level.")
Fix availability:
None.
Work-arounds advised:
None possible. Remove products from network. R7-0034: VxWorks WDB Agent Debug Service Exposure
August 2, 2010
-- Rapid7 Customer Protection:
Rapid7 NeXpose customers have access to a vulnerability check for this
flaw as of the latest update. More information about this check can be
found online at:
http://www.rapid7.com/vulndb/lookup/vxworks-wdbrpc-exposed
-- Vulnerability Details:
This vulnerability allows remote attackers to read memory, write memory,
execute code, and ultimately take complete control of the affected
device. This issue affects over 100 different vendors and a multitude of
products, both shipping and end-of-life. A spreadsheet of identified
products affected by this flaw can be found at the URL below. This index
is not comprehensive and not all devices found are still supported.
http://www.metasploit.com/data/confs/bsideslv2010/VxWorksDevices.xls
This flaw occurs due to an insecure setting in the configuration file of
the manufacturer's source code. This setting results in a system- debug
service being exposed on UDP port 17185. More information about this issue can be found
at the Metasploit blog:
http://blog.metasploit.com/2010/08/vxworks-vulnerabilities.html
-- Vendor Response:
Wind River Systems has notified their customers of the issue and
indicated that the WDB agent should be disabled for production builds.
CERT has notified every vendor with an identified, shipping product
containing this vulnerability. Responses for each specific vendor can be
found in the CERT advisory:
http://www.kb.cert.org/vuls/id/362332
-- Disclosure Timeline:
2010-06-02 - Vulnerability reported to CERT for vendor notification
2010-08-02 - Coordinated public release of advisory
-- Credit:
This vulnerability had been discovered in specific devices in multiple
instances, first by Bennett Todd in 2002 and then Shawn Merdinger in
2005. A comprehensive analysis of all affected devices was conducted by
HD Moore in 2010.
-- About Rapid7 Security
Rapid7 provides vulnerability management, compliance and penetration
testing solutions for Web application, network and database security. In
addition to developing the NeXpose Vulnerability Management system,
Rapid7 manages the Metasploit Project and is the primary sponsor of the
W3AF web assessment tool.
Our vulnerability disclosure policy is available online at:
http://www.rapid7.com/disclosure.jsp
| VAR-201008-0270 | CVE-2010-2965 |
Wind River Systems VxWorks debug service enabled by default
Related entries in the VARIoT exploits database: VAR-E-201008-0090 |
CVSS V2: 10.0 CVSS V3: - Severity: HIGH |
The WDB target agent debug service in Wind River VxWorks 6.x, 5.x, and earlier, as used on the Rockwell Automation 1756-ENBT series A with firmware 3.2.6 and 3.6.1 and other products, allows remote attackers to read or modify arbitrary memory locations, perform function calls, or manage tasks via requests to UDP port 17185, a related issue to CVE-2005-3804. Some products based on VxWorks have the WDB target agent debug service enabled by default. This service provides read/write access to the device's memory and allows functions to be called. The VxWorks WDB target agent is a target-resident, run-time facility that is required for connecting host tools to a VxWorks target system during development. WDB is a selectable component in the VxWorks configuration and is enabled by default. The WDB debug agent access is not secured and does provide a security hole in a deployed system. It is advisable for production systems to reconfigure VxWorks with only those components needed for deployed operation and to build it as the appropriate type of system image. It is recommended to remove host development components such as the WDB target agent and debugging components (INCLUDE_WDB and INCLUDE_DEBUG) as well as other operating system components that are not required to support customer applications. Consult the VxWorks Kernel Programmer's guide for more information on WDB.Additional information can be found in ICS-CERT advisory ICSA-10-214-01 and on the Metasploit Blog. An attacker can use the debug service to fully compromise the device. The hashing algorithm that is used in the standard authentication API for VxWorks is susceptible to collisions. An attacker can brute force a password by guessing a string that produces the same hash as a legitimate password. It is relatively easy to find a string that has the same hash value as a regular password.Authentication by attacker API (loginLib) May be used to access services using. The problem is CVE-2005-3804 May be related toBy a third party UDP An arbitrary memory area may be read or modified, a function call executed, or a task managed through a request to the port. VxWorks is an embedded real-time operating system. VxWorks has multiple security vulnerabilities that allow an attacker to bypass security restrictions and gain unauthorized access to the system. For example, when logging in with the default 'target/password', 'y{{{{{SS' will HASH out the same result as 'password'. So you can use 'password' and 'y{{{{{SS' as the password to log in. Permissions and access control vulnerabilities exist in the WDB Target Agent Debugging Service in Wind River VxWorks 6.x, 5.x and earlier. VxWorks is prone to a remote security-bypass vulnerability.
Successful exploits will allow remote attackers to perform debugging tasks on the vulnerable device.
The issue affects multiple products from multiple vendors that ship with the VxWorks operating system.
NOTE: This issue was previously covered in BID 42114 (VxWorks Multiple Security Vulnerabilities) but has been separated into its own record to better document it. ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
VxWorks loginLib Default Password Hashing Algorithm Security Issue
SECUNIA ADVISORY ID:
SA40803
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40803/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40803
RELEASE DATE:
2010-08-03
DISCUSS ADVISORY:
http://secunia.com/advisories/40803/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40803/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40803
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
A security issue has been reported in VxWorks, which can be exploited
by malicious people to conduct brute force attacks. collision attacks.
Successful exploitation requires that a valid login name is known.
SOLUTION:
The vendor has issued patches removing the 80 characters limitation
for encrypted password string length limitation for VxWorks versions
5.5.1 through 6.4.
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
PROVIDED AND/OR DISCOVERED BY:
HD Moore
ORIGINAL ADVISORY:
HD Moore:
http://blog.metasploit.com/2010/08/vxworks-vulnerabilities.html
Wind River:
http://www.kb.cert.org/vuls/id/MAPG-863QH9
https://support.windriver.com/olsPortal/faces/maintenance/downloadDetails.jspx?contentId=033709
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
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| VAR-201008-0278 | CVE-2010-2973 | iPhone and iPod touch Run on Apple iOS of IOSurface Vulnerable to integer overflow |
CVSS V2: 6.9 CVSS V3: - Severity: MEDIUM |
Integer overflow in IOSurface in Apple iOS before 4.0.2 on the iPhone and iPod touch, and before 3.2.2 on the iPad, allows local users to gain privileges via vectors involving IOSurface properties, as demonstrated by JailbreakMe.
Successfully exploiting this issue can allow attackers to elevate privileges, leading to a complete compromise of the device.
iOS versions 4.0.1 and prior are vulnerable.
NOTE (August 12, 2010): This BID was previously titled 'Apple iOS Multiple Vulnerabilities' and included details about a remote code-execution vulnerability. Following further analysis, we determined that the remote code-execution issue was already documented in BID 42241 (FreeType Compact Font Format (CFF) Multiple Stack Based Buffer Overflow Vulnerabilities). ----------------------------------------------------------------------
"From 2007 to 2009 vulnerabilities in a typical end-user PC almost doubled from about 220 to 420."
Non-Microsoft software to blame for increase in vulnerabilities affecting typical Windows end-users, read more:
http://secunia.com/gfx/pdf/Secunia_Half_Year_Report_2010.pdf
----------------------------------------------------------------------
TITLE:
Apple iOS Security Bypass and PDF File Processing Vulnerability
SECUNIA ADVISORY ID:
SA40807
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40807/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40807
RELEASE DATE:
2010-08-03
DISCUSS ADVISORY:
http://secunia.com/advisories/40807/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/40807/
ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=40807
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Two vulnerabilities have been reported in Apple iOS, which can be
exploited by malicious people to compromise a user's system.
1) An error in the processing of PDF files can be exploited to
execute arbitrary code e.g. when a user visits a specially crafted
web page.
2) An unspecified error in the kernel can be exploited to gain
escalated privileges.
The vulnerabilities are reported in 4.0.1. Other versions may also be
affected.
NOTE: The vulnerabilities are currently exploited to jailbreak a
vulnerable device.
SOLUTION:
Do not browse untrusted sites or follow links from untrusted sources.
Do not open PDF files from untrusted sources.
PROVIDED AND/OR DISCOVERED BY:
comex, disclosed via jailbreakme.com
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------
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