Cisco Security Advisory-
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 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-cucm
Cisco has released software updates that address these vulnerabilities. There are no available workarounds to mitigate these vulnerabilities. This advisory is posted at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110824-ime.
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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
Other than the Cisco Unified Communications Manager, no other Cisco products are currently known to be affected by these vulnerabilities.
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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.
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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: https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20110824-cucm-ime
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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
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory.
These vulnerabilities were found during internal testing.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessRevision 1.0
2011-August-24
Initial public release.
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