Cisco IOS 15.3M before 15.3(3)M2 and IOS XE 3.10.xS before 3.10.2S allow remote attackers to cause a denial of service (device reload) via crafted SIP messages, aka Bug ID CSCug45898. Per: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-sip
"The following Cisco IOS Software and Cisco IOS XE Software releases are affected by this vulnerability:
Cisco IOS Software release 15.3(3)M and 15.3(3)M1
Cisco IOS XE Software release 3.10.0S and 3.10.1S1"
Publication date: Fri, 28 Mar 2014 02:55:00 +0000