The SIP IX implementation in Cisco TelePresence Video Communication Server (VCS) and Expressway Software before X8.1.1 allows remote attackers to cause a denial of service (device reload) via crafted SDP packets, aka Bug ID CSCuo42252.
http://www.securitytracker.com/id/1031055
http://tools.cisco.com/security/center/viewAlert.x?alertId=35828
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141015-vcs