Cisco IP Phones 7902/7905/7912, ATA 186/188, Unity Express, ACNS, and Subscriber Edge Services Manager (SESM) allows remote attackers to cause a denial of service (crash or instability) via a compressed DNS packet with a label length byte with an incorrect offset.
https://exchange.xforce.ibmcloud.com/vulnerabilities/20712
http://www.securityfocus.com/bid/13729
http://www.niscc.gov.uk/niscc/docs/re-20050524-00432.pdf?lang=en
http://www.niscc.gov.uk/niscc/docs/al-20050524-00433.html
http://www.cisco.com/warp/public/707/cisco-sn-20050524-dns.shtml
http://securitytracker.com/id?1015975
http://securitytracker.com/id?1014046
http://securitytracker.com/id?1014045
http://securitytracker.com/id?1014044