Advisory ID: cisco-sa-20110824-ime
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-ime
Revision 1.0
For Public Release 2011 August 24 16:00 UTC (GMT)
Contents
Summary
Affected Products
Details
Vulnerability Scoring Details
Impact
Software Versions and Fixes
Workarounds
Obtaining Fixed Software
Exploitation and Public Announcements
Status of This Notice: Final
Distribution
Revision History
Cisco Security Procedures
Summary
Two denial of service (DoS) vulnerabilities exist in the Cisco Intercompany Media Engine. An unauthenticated attacker could exploit these vulnerabilities by sending crafted Service Advertisement Framework (SAF) packets to an affected device, which may cause the device to reload.
Note: Cisco Unified Communications Manager Software is also affected by these vulnerabilities. A separate Cisco Security Advisory has been published to disclose the vulnerabilities that affects the Cisco Unified Communications Manager. That advisory is available at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-cucm
Cisco has released free software updates that address these vulnerabilities. There are no available workarounds to mitigate these vulnerabilities. This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-ime.Affected Products
Vulnerable Products
Cisco Intercompany Media Engine Software Release 8.0.x is affected by this vulnerability. Cisco Intercompany Media Engine Software Release 8.5.x is not affected.
Cisco Unified Communications Manager Software Release 8.0.x is also affected by these vulnerabilities.
Products Confirmed Not Vulnerable
Details
Cisco Intercompany Media Engine provides a technique for establishing direct IP connectivity between enterprises by combining peer-to-peer technologies with the existing public switched telephone network (PSTN) infrastructure.
Cisco Intercompany Media Engine is affected by two DoS vulnerabilities that an unauthenticated attacker could exploit by sending crafted SAF packets to an affected device. Successful exploitation could cause the device to reload.
Note: A TCP three-way handshake is needed in order to trigger these vulnerabilities.
These vulnerabilities are documented in Cisco bug IDs CSCth26669 ( registered customers only) and CSCth19417 ( registered customers only) ; and have been assigned CVE IDs CVE-2011-2563 and CVE-2011-2564, respectively.
Vulnerability Scoring Details
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 .
|
CSCth26669 - IME may experience a reload when receiving certain UCM client msgs Calculate the environmental score of CSCth26669 |
||||||
|---|---|---|---|---|---|---|
|
CVSS Base Score - 7.8 |
||||||
|
Access Vector |
Access Complexity |
Authentication |
Confidentiality Impact |
Integrity Impact |
Availability Impact |
|
|
Network |
Low |
None |
None |
None |
Complete |
|
|
CVSS Temporal Score - 6.4 |
||||||
|
Exploitability |
Remediation Level |
Report Confidence |
||||
|
Functional |
Official-Fix |
Confirmed |
||||
|
CSCth19417 - IME may experience a reload when receiving certain UCM client msgs Calculate the environmental score of CSCth19417 |
||||||
|---|---|---|---|---|---|---|
|
CVSS Base Score - 7.8 |
||||||
|
Access Vector |
Access Complexity |
Authentication |
Confidentiality Impact |
Integrity Impact |
Availability Impact |
|
|
Network |
Low |
None |
None |
None |
Complete |
|
|
CVSS Temporal Score - 6.4 |
||||||
|
Exploitability |
Remediation Level |
Report Confidence |
||||
|
Functional |
Official-Fix |
Confirmed |
||||
Impact
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.
These vulnerabilities have been corrected in Cisco Intercompany Media Engine software version 8.5(1) and later.
Cisco Intercompany Media Engine software can be downloaded from:
http://www.cisco.com/cisco/software/navigator.html?mdfid=282822890&i=rm
Workarounds
There are no workarounds to mitigate these vulnerabilities.
Additional mitigations that can be deployed on Cisco devices in the network are available in the Cisco Applied Mitigation Bulletin companion document for this advisory, which is available at the following link: http://tools.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20110824-cucm-ime
Obtaining Fixed Software
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 Using Third-Party Support Organizations
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
These vulnerabilities were found during internal testing.
Status of This Notice: Final
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.
Distribution
This advisory is posted on Cisco's worldwide website at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-ime
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 |
2011-August-24 |
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.
