Unspecified vulnerability in the Session Initiation Protocol (SIP) implementation in Cisco IOS 12.2 through 12.4 and Unified Communications Manager 4.1 through 6.1, when VoIP is configured, allows remote attackers to cause a denial of service (device or process reload) via unspecified valid SIP messages, aka Cisco Bug ID CSCsm46064, a different vulnerability than CVE-2008-3800 and CVE-2008-3802.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6047
http://www.vupen.com/english/advisories/2008/2671
http://www.vupen.com/english/advisories/2008/2670
http://www.securityfocus.com/bid/31367
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a0156a.shtml
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01562.shtml