The Instant Messenger (IM) inspection engine in Cisco Adaptive Security Appliance (ASA) and Cisco PIX security appliance 7.2.x before 7.2(4), 8.0.x before 8.0(3)10, and 8.1.x before 8.1(1)2 allows remote attackers to cause a denial of service via a crafted packet.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42837
http://www.vupen.com/english/advisories/2008/1750/references
http://www.cisco.com/en/US/products/products_security_advisory09186a00809a8354.shtml
http://securitytracker.com/id?1020181