__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Multiple Cisco Unified CallManager Vulnerabilities [Document ID: 70652] July 13, 2006 23:00 GMT Number Q-245 ______________________________________________________________________________ PROBLEM: There are potential privilege escalation vulnerabilities in the CLI which may allow an authenticated administrator to access the base operating system with root privileges. There is also a buffer overflow vulnerability in the processing of hostnames contained in a SIP request which may result in arbitrary code execution or cause a denial of service. PLATFORM: Cisco Unified CallManager 5.0 DAMAGE: Successful exploitation of the CLI vulnerability may allow authenticated CLI users to execute arbitrary operating system commands with root privileges or allow an authenticated CLI user to modify or overwrite any file on the filesystem as the root user. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Execute arbitrary operating system commands ASSESSMENT: with root privileges. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-245.shtml ORIGINAL BULLETIN: http://www.cisco.com/en/US/products/products_security_advisory09186a00806e0b9f.shtml ______________________________________________________________________________ [***** Start Document ID: 70652 *****] Cisco Security Advisory: Multiple Cisco Unified CallManager Vulnerabilities Downloads Cisco Security Advisory: Multiple Cisco Unified CallManager Vulnerabilities Document ID: 70652 Advisory ID: cisco-sa-20060712-cucm http://www.cisco.com/warp/public/707/cisco-sa-20060712-cucm.shtml Revision 1.0 For Public Release 2006 July 12 1600 UTC (GMT) Contents Summary Affected Products Details Impact Software Version and Fixes Workarounds Obtaining Fixed Software Exploitation and Public Announcements Status of this Notice: FINAL Distribution Revision History Cisco Security Procedures Summary Cisco Unified CallManager (CUCM) 5.0 has Command Line Interface (CLI) and Session Initiation Protocol (SIP) related vulnerabilities. There are potential privilege escalation vulnerabilities in the CLI which may allow an authenticated administrator to access the base operating system with root privileges. There is also a buffer overflow vulnerability in the processing of hostnames contained in a SIP request which may result in arbitrary code execution or cause a denial of service. These vulnerabilities only affect Cisco Unified CallManager 5.0. Cisco has made free software available to address these vulnerabilities for affected customers. There are no workarounds available to mitigate the effects of these vulnerabilities. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20060712-cucm.shtml. Affected Products Vulnerable Products Only Cisco Unified CallManager versions 5.0(1), 5.0(2), 5.0(3) and 5.0(3a) are affected. The version of CallManager software running can be determined navigating to Show > Software in the CUCM IPT Platform administration interface or by running the command show version active in the CLI. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by these vulnerabilities, including all previous versions of Cisco Unified CallManager. Details Cisco Unified CallManager is the software-based call-processing component of the Cisco IP telephony solution which extends enterprise telephony features and functions to packet telephony network devices such as IP phones, media processing devices, voice-over-IP (VoIP) gateways, and multimedia applications. The CallManager CLI provides a backup management interface to the system in order to diagnose and troubleshoot the primary HTTPS-based management interfaces. The CLI, which runs as the root user, contains two vulnerabilities in the parsing of commands. The first vulnerability may allow an authenticated CUCM administrator to execute arbitrary operating system programs as the root user. The second vulnerability may allow output redirection of a command to a file or a folder specified on the command line. Cisco Unified CallManager supports the coexistence of both SCCP and SIP phones, allowing for migration to SIP while protecting investments in existing devices. CUCM contains a buffer overflow vulnerability in the processing of excessively long hostnames which may be included in a SIP request. These issues are documented by the following Cisco bug IDs: * CSCse11005 ( registered customers only) Certain CLI commands allow execution of arbitrary Linux commands * CSCse31704 ( registered customers only) User able to redirect command output to a file folder * CSCsd96542 ( registered customers only) SD-GA: CCM cores when SIP request line host name has ASCII overflow Impact Successful exploitation of the CLI vulnerability documented in Cisco bug ID CSCse11005 may allow authenticated CLI users to execute arbitrary operating system commands with root privileges. Exploitation of the CLI vulnerability documented in Cisco bug ID CSCse31704 may allow an authenticated CLI user to modify or overwrite any file on the filesystem as the root user. Exploitation of the SIP vulnerability documented in Cisco bug ID CSCsd96542 may result in arbitrary code execution or a denial of service. Software Version 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. Workarounds There are no workarounds for these vulnerabilities. Obtaining Fixed Software Cisco will make free software available to address this vulnerability for affected customers. This advisory will be updated as fixed software becomes available. 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/public/sw-license-agreement.html , or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml. Do not contact either "psirt@cisco.com" or "security-alert@cisco.com" for software upgrades. Fixed software may obtained at http://www.cisco.com/pcgi-bin/tablebuild.pl/callmgr-50. Affected Releases Fixed Releases Cisco Unified CallManager 5.0(1) Cisco Unified CallManager 5.0(2) Cisco Unified CallManager 5.0(3) Cisco Unified CallManager 5.0(3a) Cisco Unified CallManager 5.0(4) and later 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 agreement 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 who do not hold a Cisco service contract and customers who purchase through third-party vendors but are unsuccessful at obtaining fixed software through their point of sale should get their 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 Have your product serial number available and give the URL of this notice as evidence of your 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 special 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. 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-20060712-cucm.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-teams@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 2006-July-12 1600 UTC (GMT) 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. Updated: Jul 12, 2006 Document ID: 70652 [***** End Document ID: 70652 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Cisco for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) Q-235: Cisco Security Advisory: Access Point Web-browser Interface Vulnerability Q-236: OpenOffice.org Vulnerabilities Q-237: iTunes 6.0.5 Q-238: Kernel Security Update Q-239: ppp Programming Error Q-240: Vulnerability in Server Service Q-241: Vulnerability in Microsoft Internet Information Services using Active Server Pages Q-242: Vulnerabilities in Microsoft Excel Q-243: Vulnerabilities in Microsoft Office Q-244: Vulnerabilities in Microsoft Office Filters