Cisco IOS 12.4 and 15.0 through 15.4 and IOS XE 3.1.xS, 3.2.xS, 3.3.xS, 3.4.xS, 3.5.xS, 3.6.xS, and 3.7.xS before 3.7.6S; 3.8.xS, 3.9.xS, and 3.10.xS before 3.10.1S; and 3.11.xS before 3.12S allow remote attackers to cause a denial of service (device reload) via a crafted SIP message, aka Bug ID CSCul46586.
https://exchange.xforce.ibmcloud.com/vulnerabilities/96174
http://www.securitytracker.com/id/1030897
http://www.securityfocus.com/bid/70141
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140924-sip