CVE-2011-3279: Undefined Security Weakness

The provider-edge MPLS NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service device reload via a malformed SIP packet to UDP port 5060, aka Bug ID CSCti98219...