ID

VAR-200809-0039

CVE

CVE-2008-3805

TITLE

Cisco IOS In UDP Interfering with service operations related to packet processing (DoS) Vulnerabilities

DESCRIPTION

Cisco IOS 12.0 through 12.4 on Cisco 10000, uBR10012 and uBR7200 series devices handles external UDP packets that are sent to 127.0.0.0/8 addresses intended for IPC communication within the device, which allows remote attackers to cause a denial of service (device or linecard reload) via crafted UDP packets, a different vulnerability than CVE-2008-3806. this is CVE-2008-3806 Is a different vulnerability.Crafted by a third party UDP Service disruption by processing packets (DoS) There is a possibility of being put into a state. Multiple Cisco products running Cisco IOS (Internetwork Operating System) are prone to a denial-of-service vulnerability when handling maliciously crafted UDP-based IPC traffic. An attacker can exploit this issue to trigger device or linecard reloads, causing denial-of-service conditions. The following device series are affected: Cisco 10000 Cisco uBR10012 Cisco uBR7200. ---------------------------------------------------------------------- Do you need accurate and reliable IDS / IPS / AV detection rules? Get in-depth vulnerability details: http://secunia.com/binary_analysis/sample_analysis/ ---------------------------------------------------------------------- TITLE: Cisco IOS Multiple Vulnerabilities SECUNIA ADVISORY ID: SA31990 VERIFY ADVISORY: http://secunia.com/advisories/31990/ CRITICAL: Moderately critical IMPACT: Exposure of sensitive information, DoS, System access WHERE: >From remote OPERATING SYSTEM: Cisco IOS R12.x http://secunia.com/advisories/product/50/ Cisco IOS 12.x http://secunia.com/advisories/product/182/ DESCRIPTION: Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to disclose sensitive information, cause a DoS (Denial of Service), or to compromise a vulnerable system. 1) An unspecified error exists in the processing of SSL packets during the termination of an SSL session, which can potentially be exploited to crash an affected system. 2) Two unspecified errors exist within the processing of Protocol Independent Multicast (PIM) packets, which can be exploited to cause an affected device to reload. 3) Unspecified errors within the processing of segmented Skinny Call Control Protocol (SCCP) messages can be exploited to cause a Cisco IOS device to reload. Successful exploitation requires that the device is configured with Network Address Translation (NAT) SCCP Fragmentation Support. 4) A memory leak in the processing of Session Initiation Protocol (SIP) messages can be exploited to cause a DoS for all voice services. 6) An unspecified error in the IOS Intrusion Prevention System (IPS) feature when processing certain IPS signatures that use the SERVICE.DNS engine can be exploited to cause a DoS via specially crafted network traffic. 7) A security issue exists in the processing of extended communities with Multi Protocol Label Switching (MPLS) Virtual Private Networks (VPN), which can lead to traffic leaking from one MPLS VPN to another. 8) An unspecified error within the Multi Protocol Label Switching (MPLS) Forwarding Infrastructure (MFI) can be exploited to cause a DoS via specially crafted network packets. Successful exploitation requires access to the MPLS network. 9) An unspecified error within the Application Inspection Control (AIC) can be exploited to cause a reload of an affected device via specially crafted HTTP packets. 10) An unspecified error in the processing of Layer 2 Tunneling Protocol (L2TP) packets can be exploited to cause an affected device to reload via a specially crafted L2TP packets. Successful exploitation requires that the L2TP mgmt daemon process is running. This process may be enabled e.g. via Layer 2 virtual private networks (L2VPN), Layer 2 Tunnel Protocol Version 3 (L2TPv3), Stack Group Bidding Protocol (SGBP), or Cisco Virtual Private Dial-Up Networks (VPDN). 11) An unspecified error exists in the processing of IPC messages. 12) A security issue is caused due to the device automatically enabling SNMP with a default community string, which can be exploited to gain control an affected system. Successful exploitation requires that a device is configured for linecard redundancy. SOLUTION: Update to the fixed version (please see the vendor's advisories for details). PROVIDED AND/OR DISCOVERED BY: Reported by the vendor. ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody 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 ---------------------------------------------------------------------- . No other platforms are affected. Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml Note: The September 24, 2008 IOS Advisory bundled publication includes twelve Security Advisories. Eleven of the advisories address vulnerabilities in Cisco's IOS^ software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each Advisory lists the releases that correct the vulnerability described in the Advisory. Please reference the following software table to find a release that fixes all published IOS software Advisories as of September 24th, 2008: http://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml Individual publication links are listed below: * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml * http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml Affected Products ================= Cisco 10000, uBR10012 and uBR7200 series devices that are running an affected version of Cisco IOS are affected. The following example shows an output taken from a Cisco 10000 series device running Cisco IOS software release 12.2(31)SB10e: c10k#show version | include IOS Cisco IOS Software, 10000 Software (C10K3-P11-M), Version 12.2(31)SB10e, RELEASE SOFTWARE (fc1) c10k# The following example shows an output taken from a Cisco uBR10012 series device running Cisco IOS software release 12.3(17b)BC7: ubr10k#show version | include IOS IOS (tm) 10000 Software (UBR10K-K8P6U2-M), Version 12.3(17b)BC7, RELEASE SOFTWARE (fc1) ubr10k# The following example shows an output taken from a Cisco uBR7200 series device running Cisco IOS software release 12.3(21a)BC2: ubr7200#show version | include IOS IOS (tm) 7200 Software (UBR7200-IK9SU2-M), Version 12.3(21a)BC2, RELEASE SOFTWARE (fc1) ubr7200# Please refer to the document entitled "White Paper: Cisco IOS Reference Guide" for additional information on the Cisco IOS release naming conventions. This document is available at the following link: http://www.cisco.com/warp/public/620/1.html Any version of Cisco IOS prior to the fixed versions listed in the Software Versions and Fixes section below is vulnerable. No other Cisco products are currently known to be affected by this vulnerability. This channel uses addresses from the 127.0.0.0/8 range and UDP port 1975. Filtering unauthorized traffic destined to 127.0.0.0/8 or UDP port 1975 will mitigate this vulnerability. This vulnerability is documented in the Cisco Bug IDs CSCsg15342 and CSCsh29217 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2008-3805. 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 CSCsg15342 - IPC processing needs to be more robust CVSS Base Score - 8.5 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - Partial Availability Impact - Complete CVSS Temporal Score - 7 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed CSCsh29217 - IPC processing needs to be more robust CVSS Base Score - 8.5 Access Vector - Network Access Complexity - Low Authentication - None Confidentiality Impact - None Integrity Impact - Partial Availability Impact - Complete CVSS Temporal Score - 7 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== Successful exploitation of the vulnerability may result in a reload of the device, linecards, or both, resulting in a 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. Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table. +-------------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |-------------+-----------------------------------------------------| | Affected | | Recommended | | 12.0-Based | First Fixed Release | Release | | Releases | | | |-------------+-------------------------------------+---------------| | 12.0 | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0DA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0DB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0DC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | Releases prior to 12.0(32)S are | 12.0(32)S11 | | 12.0S | vulnerable, release 12.0(32)S and | | | | later are not vulnerable; | 12.0(33)S1 | |-------------+-------------------------------------+---------------| | 12.0SC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0SL | Vulnerable, migrate to 12.0S, 12.1 | | |-------------+-------------------------------------+---------------| | 12.0SP | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0ST | Vulnerable, migrate to 12.0S, 12.1 | | |-------------+-------------------------------------+---------------| | 12.0SX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0SY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | | 12.0(32)S11 | | 12.0SZ | 12.0(30)SZ4 | | | | | 12.0(33)S1 | |-------------+-------------------------------------+---------------| | 12.0T | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0W | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0WC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0WT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XI | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XN | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XS | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.0XV | Not Vulnerable | | |-------------+-------------------------------------+---------------| | Affected | | Recommended | | 12.1-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.1 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.2-Based | First Fixed Release | Release | | Releases | | | |-------------+-------------------------------------+---------------| | 12.2 | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2B | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2BC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2BW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2BX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2BY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2BZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2CX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2CY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2CZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2DA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2DD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2DX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2EW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2EWA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2EX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2EY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2EZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2FX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2FY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2FZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IRB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2IXG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2JA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2JK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2MB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2MC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2S | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | 12.2(31)SB13 | 12.2(33)SB2; | | 12.2SB | | Available on | | | 12.2(33)SB1 | 26-SEP-08 | |-------------+-------------------------------------+---------------| | 12.2SBC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SCA | 12.2(33)SCA1 | 12.2(33)SCA1 | |-------------+-------------------------------------+---------------| | 12.2SE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SED | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SEG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SGA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SO | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SRA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SRB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SRC | 12.2(33)SRC2 | 12.2(33)SRC2 | |-------------+-------------------------------------+---------------| | 12.2SU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SV | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SVA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SVC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SVD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SXH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2SZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2T | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2TPC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XI | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XN | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XNA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XNB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XO | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XS | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XV | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2XW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YN | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YO | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YP | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YS | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YV | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2YZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZP | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | | 12.2(33)SB2; | | 12.2ZX | Vulnerable; first fixed in 12.2SB | Available on | | | | 26-SEP-08 | |-------------+-------------------------------------+---------------| | 12.2ZY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.2ZYA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | Affected | | Recommended | | 12.3-Based | First Fixed Release | Release | | Releases | | | |-------------+-------------------------------------+---------------| | 12.3 | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3B | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | 12.3(17b)BC6 | | | | | | | 12.3BC | 12.3(21a)BC1 | 12.3(23)BC4 | | | | | | | 12.3(23)BC | | |-------------+-------------------------------------+---------------| | 12.3BW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3EU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JEA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JEB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JEC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3JX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | Note: Releases prior to 12.3(14)T3 | 12.4(15)T7 | | 12.3T | are vulnerable, release 12.3(14)T3 | | | | and later are not vulnerable; | 12.4(18c) | |-------------+-------------------------------------+---------------| | 12.3TPC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3VA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | | | 12.2(33)SB2; | | 12.3XI | 12.3(7)XI10a | Available on | | | | 26-SEP-08 | |-------------+-------------------------------------+---------------| | 12.3XJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XS | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3XZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YH | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YI | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YS | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YU | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3YZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.3ZA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | Affected | | Recommended | | 12.4-Based | First Fixed Release | Release | | Releases | | | |-------------+-------------------------------------+---------------| | | Note: Releases prior to 12.4(3) are | | | 12.4 | vulnerable, release 12.4(3) and | 12.4(18c) | | | later are not vulnerable; | | |-------------+-------------------------------------+---------------| | 12.4JA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JMA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JMB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JMC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4JX | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4MD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4MR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4SW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4T | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XA | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XB | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XC | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XD | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XE | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XF | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XG | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XJ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XK | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XL | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XM | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XN | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XP | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XQ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XR | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XT | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XV | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XW | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XY | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4XZ | Not Vulnerable | | |-------------+-------------------------------------+---------------| | 12.4YA | Not Vulnerable | | +-------------------------------------------------------------------+ Workarounds =========== Workarounds consist of filtering packets that are sent to 127.0.0.0/8 range and UDP packets that are sent to port 1975. Using Interface Access Control Lists +----------------------------------- Access lists that filter UDP packets destined to port 1975 can be used to mitigate this vulnerability. UDP port 1975 is a registered port number that can be used by certain applications. However, filtering all packets that are destined to UDP port 1975 may cause some applications to malfunction. Therefore, access lists need to explicitly deny UDP 1975 packets that are sent to any router interface IP addresses and permit transit traffic. Such access lists need to be applied on all interfaces to be effective. Since the IPC channel uses addresses from the 127.0.0.0/8 range, it is also necessary to filter packets that are sourced from or destined to this range. An example is given below: access-list 100 deny udp any host <router-interface 1> eq 1975 access-list 100 deny udp any host <router-interface 2> eq 1975 access-list 100 deny udp any host <router-interface ...> eq 1975 access-list 100 deny ip 127.0.0.0 0.255.255.255 any access-list 100 deny ip any 127.0.0.0 0.255.255.255 access-list 100 permit ip any any interface Serial 0/0 ip access-group 100 in Using Control Plane Policing +--------------------------- Control Plane Policing (CoPP) can be used to block untrusted UDP port 1975 access to the affected device. Cisco IOS software releases 12.2BC and 12.2SCA support the CoPP feature. CoPP may be configured on a device to protect the management and control planes to minimize the risk and effectiveness of direct infrastructure attacks by explicitly permitting only authorized traffic sent to infrastructure devices in accordance with existing security policies and configurations. The following example can be adapted to your network. Note: CoPP is not supported on uBR10012 series devices. !-- Permit all UDP/1975 traffic so that it !-- will be policed and dropped by the CoPP feature ! access-list 111 permit udp any any eq 1975 access-list 111 permit ip any 127.0.0.0 0.255.255.255 access-list 111 permit ip 127.0.0.0 0.255.255.255 any ! !-- Permit (Police or Drop)/Deny (Allow) all other Layer 3 and !-- Layer 4 traffic in accordance with existing security policies !-- and configurations for traffic that is authorized to be sent !-- to infrastructure devices ! !-- Create a Class-Map for traffic to be policed by the CoPP !-- feature ! class-map match-all drop-IPC-class match access-group 111 ! !-- Create a Policy-Map that will be applied to the Control-Plane !-- of the device ! policy-map drop-IPC-traffic class drop-IPC-class drop ! !-- Apply the Policy-Map to the Control-Plane of the device ! control-plane service-policy input drop-IPC-traffic ! In the above CoPP example, the access control list entries (ACEs) which match the potential exploit packets with the "permit" action result in these packets being discarded by the policy-map "drop" function, while packets that match the "deny" action (not shown) are not affected by the policy-map drop function. Please note that in the Cisco IOS 12.2S and 12.0S trains the policy-map syntax is different: ! policy-map drop-IPC-traffic class drop-IPC-class police 32000 1500 1500 conform-action drop exceed-action drop ! Additional information on the configuration and use of the CoPP feature can be found at http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html, http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6642/prod_white_paper0900aecd804fa16a.html and http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html Using Infrastructure ACLs at Network Boundary +-------------------------------------------- Although it is often difficult to block traffic transiting your network, it is possible to identify traffic which should never be allowed to target your infrastructure devices and block that traffic at the border of your network. iACLs are a network security best practice and should be considered as a long-term addition to good network security as well as a workaround for this specific vulnerability. The iACL example shown below should be included as part of the deployed infrastructure access-list which will protect all devices with IP addresses in the infrastructure IP address range: !-- Note: IPC packets sent to UDP destination port 1975 must not !-- be permitted from any trusted source as this traffic !-- should only be sent and received internally by the !-- affected device using an IP address allocated from the !-- 127.0.0.0/8 prefix. !-- !-- IPC that traffic that is internally generated and sent !-- and/or received by the affected device is not subjected !-- to packet filtering by the applied iACL policy. ! access-list 150 deny udp any host INTERFACE_ADDRESS#1 eq 1975 access-list 150 deny udp any host INTERFACE_ADDRESS#2 eq 1975 access-list 150 deny udp any host INTERFACE_ADDRESS#N eq 1975 ! !-- Deny all IP packets with a source or destination IP address !-- from the 127.0.0.0/8 prefix. ! access-list 150 deny ip 127.0.0.0 0.255.255.255 any access-list 150 deny ip any 127.0.0.0 0.255.255.255 ! !-- Permit/deny all other Layer 3 and Layer 4 traffic in accordance !-- with existing security policies and configurations. ! !-- Permit all other traffic to transit the device. ! access-list 150 permit ip any any ! !-- Apply iACL to interfaces in the ingress direction. ! interface GigabitEthernet0/0 ip access-group 150 in ! Note: iACLs that filter UDP packets destined to port 1975 can be used to mitigate this vulnerability. However, UDP port 1975 is a registered port number that can be used by certain applications. Filtering all packets that are destined to UDP port 1975 may cause some applications to malfunction. Therefore, the iACL policy needs to explicitly deny UDP packets using a destination port of 1975 that are sent to any router interface IP addresses for affected devices, then permit and/or deny all other Layer 3 and Layer 4 traffic in accordance with existing security policies and configurations, and then permit all other traffic to transit the device. iACLs must be applied on all interfaces to be used effectively. Since the IPC channel uses addresses from the 127.0.0.0/8 range, it is also necessary to filter packets that are sourced from or destined to this range as provided in the preceding example. The white paper entitled "Protecting Your Core: Infrastructure Protection Access Control Lists" presents guidelines and recommended deployment techniques for infrastructure protection access lists. This white paper can be obtained here: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a00801a1a55.shtml Additional Mitigation Techniques +------------------------------- 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, which is available at the following link: http://www.cisco.com/warp/public/707/cisco-amb-20080924-ipc-and-ubr.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/products/prod_warranties_item09186a008088e31f.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/warp/public/687/Directory/DirTAC.shtml 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. This vulnerability was found internally. 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-20080924-ipc.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 | 2008-Sep-24 | 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin) iEYEARECAAYFAkjaLcIACgkQ86n/Gc8U/uDLHwCeO1ZYLn/jMCO2qIX5cBhtLo46 uokAn1Q+dApUNnQOJY6Eh1cVegNVXg43 =jP+C -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

permissions and access control issues

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco Security bulletin

SOURCES

LAST UPDATE DATE

2025-04-10T22:56:57.990000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE