ID

VAR-201007-0203

CVE

CVE-2010-1577

TITLE

CDS Used in Cisco Internet Streamer Vulnerable to directory traversal

DESCRIPTION

Directory traversal vulnerability in Cisco Internet Streamer, as used in Cisco Content Delivery System (CDS) 2.2.x, 2.3.x, 2.4.x, and 2.5.x before 2.5.7 allows remote attackers to read arbitrary files via a crafted URL. The Cisco CDS Internet Streamer webserver component is prone to a directory-traversal vulnerability. An unauthenticated attacker can exploit this issue to access sensitive information. Successful exploits may lead to other attacks. This issue is tracked by Cisco BugID CSCtd68063. Versions prior to Cisco Content Delivery System 2.5.7 are vulnerable. Remote attackers can read arbitrary files with the help of malformed URLs. 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-20100721-spcdn.shtml. Vulnerable Products +------------------ To determine the software version running on a Cisco Content Delivery Engine, log in to the device and issue the "show version" command line interface (CLI) command to display the system banner. On the same line of output, the version number will be provided. Content Delivery System Software Release 2.5.3 (build b8 Jan 21 2010) Version: cde200-2.5.3.8 Compiled 16:07:11 Jan 21 2010 by ipvbuild Compile Time Options: KQ SS System was restarted on Thu Jun 3 04:09:25 2010. The system has been up for 2 hours, 11 minutes, 27 seconds. cdn-cde# Alternatively the Content Delivery System Manager home page gives a brief summary of the software versions in use on all the devices in the content delivery system network. To view the software version running on a particular device, choose "Devices > Devices". The Devices Table page displays the software version for each device listed. For further information on finding the software version, refer to the "Maintaining the Internet Streamer CDS" at the following link: http://www.cisco.com/en/US/docs/video/cds/cda/is/2_5/configuration_guide/maint.html#wp1198510. No other Cisco products are currently known to be affected by this vulnerability. Details ======= The Cisco Internet Streamer application provides edge caching, content streaming, and downloads to subscriber IP devices such as PCs. This includes the password files used to hold admin account details and system logs. This vulnerability can be exploited over all open HTTP ports; TCP ports 80 (Default HTTP port), 443 (Default HTTPS port) and 8090 (Alternate HTTP and HTTPS port), as well as those that are configured as part of the HTTP proxy. In Cisco content delivery system software 2.5.3 and earlier, it is possible to configure "Enable Incoming Proxy", which when enabled, accepts incoming requests on configured ports, in addition to TCP port 80. The additional ports that the device will listen on for HTTP requests is defined in the "List of Incoming HTTP Ports" field, within "Devices > Devices > Application Control > Web > HTTP > HTTP Connections" of the content delivery system manager menu. For further information on HTTP settings, refer to the "Cisco Internet Streamer CDS 2.5 Software Configuration Guide - Configuring Devices" at the following link: http://www.cisco.com/en/US/docs/video/cds/cda/is/2_5/configuration_guide/configdevice.html. This vulnerability is documented in the Cisco Bug ID CSCtd68063 and has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2010-1577. Vulnerability Scoring Details +---------------------------- Cisco has provided scores for the vulnerability 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 * CSCtd68063 ("CDS Internet Streamer: Web Server Directory Traversal Vulnerability") CVSS Base Score - 7.8 Access Vector - Network Access Complexity - Low Authentication - Single Confidentiality Impact - Complete Integrity Impact - None Availability Impact - None CVSS Temporal Score - 6.4 Exploitability - Functional Remediation Level - Official-Fix Report Confidence - Confirmed Impact ====== An unauthenticated attacker may be able to exploit this issue to access sensitive information, including the password files and system logs, which could be leveraged to launch subsequent attacks. 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. The recommended release contains other software fixes that are recommended by Cisco. For further information please consult the release notes at the following link: http://www.cisco.com/en/US/docs/video/cds/cda/is/2_5/release_notes/CDS_RelNotes2_5_9.html#wp100128 +---------------------------------------+ | Cisco | | | | Content | | | | Delivery | First Fixed | Recommended | | System | Release | Release | | Software | | | | Release | | | |-----------+-------------+-------------| | | Vulnerable, | | | 2.2.x | Migrate to | | | | 2.5.7 or | | | | later | | |-----------+-------------+-------------| | | Vulnerable, | | | 2.3.x | Migrate to | | | | 2.5.7 or | | | | later | | |-----------+-------------+-------------| | | Vulnerable, | | | 2.4.x | Migrate to | | | | 2.5.7 or | | | | later | | |-----------+-------------+-------------| | 2.5.x | 2.5.7 | 2.5.9 | +---------------------------------------+ Workarounds =========== Service Rules +------------ As an interim step prior to upgrading the Cisco content delivery system software, it is possible to deny access to sensitive directories via service rules. The following example shows denying access to move up a directory level. This also caters for other directory moves, such as "\.\./", ".\./" or "\../": rule enable rule action block pattern-list 1 rule pattern-list 1 url-regex ^http://.*/../.* rule pattern-list 1 url-regex ^https://.*/../.* For more information on configuring service rules and for instructions on how to perform this via the content delivery system manager, consult the Cisco Internet Streamer CDS 2.5 Software Configuration Guide at the following link: http://www.cisco.com/en/US/docs/video/cds/cda/is/2_5/configuration_guide/configdevice.html#wp1773573. Obtaining Fixed Software ======================== Cisco has released free software updates that address this vulnerability. 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. This vulnerability was reported to Cisco by BT and identified by Christopher Richardson & Simon John. 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-20100721-spcdn.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 1.0 | 2010 July 21 | Initial 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. All rights reserved. +-------------------------------------------------------------------- Updated: Jul 21, 2010 Document ID: 112019 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAkxHEIEACgkQ86n/Gc8U/uBiSQCeO8DOXUa1HP5mwVgPYQVkEVZJ fBAAnjNOGCtXhg/W5ktGiM+LNZ+Y5/Sg =Hf9O -----END PGP SIGNATURE----- . ---------------------------------------------------------------------- "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 Content Delivery System Internet Streamer Directory Traversal Vulnerability SECUNIA ADVISORY ID: SA40701 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/40701/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=40701 RELEASE DATE: 2010-07-22 DISCUSS ADVISORY: http://secunia.com/advisories/40701/#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/40701/ 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=40701 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 Cisco Content Delivery System, which can be exploited by malicious people to disclose sensitive information. This can be exploited to access arbitrary files (e.g. The vulnerability is reported in versions 2.2.x, 2.3.x, 2.4.x, and 2.5.x. SOLUTION: Update to version 2.5.7 or later. ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20100721-spcdn.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

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

path traversal

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Christopher Richardson and Simon John.

SOURCES

LAST UPDATE DATE

2025-04-11T23:20:45.818000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE