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
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.
This section provides details on affected 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.
No other Cisco products are currently known to be affected by these vulnerabilities, including all previous versions of Cisco Unified CallManager.
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:
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.
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.
There are no workarounds for these vulnerabilities.
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 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 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 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.
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.
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
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.
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.
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 1.0 |
2006-July-12 1600 UTC (GMT) |
Initial public release |
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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| Updated: Jul 12, 2006 | Document ID: 70652 |