This signature triggers on an attempt to exploit a Session Initiation Protocol (SIP) packet processing vulnerability in certain versions of the Cisco Unified Communications Manager and Cisco PGW softswitch. Successful exploitation of the vulnerability can result in a denial of service condition that may interrupt voice services. This signature recognizes the attempt over TCP.The Vulnerability in Cisco Unified Communications Manager is documented in Cisco Bug ID CSCsz40392. This vulnerability has been assigned the CVE identifier CVE-2009-2051. The Vulnerability in Cisco PGW softswitch is documented in Cisco Bug ID CSCsk38165. This vulnerability has been assigned the CVE identifier CVE-2010-0604.The potential for false positives exists, as such, this signature ships disabled by default and should only be used if running a vulnerable version of CUCM. In addition, alerts should be filtered to exclude everything except the destination IP addresses of those vulnerable servers.
Alerts should be filtered to exclude everything except the destination IP addresses of CUCM servers running a vulnerable version of code.
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