The SYMDNS.SYS driver in Symantec Norton Internet Security and Professional 2002 through 2004, Norton Personal Firewall 2002 through 2004, Norton AntiSpam 2004, Client Firewall 5.01 and 5.1.1, and Client Security 1.0 through 2.0 allows remote attackers to cause a denial of service (CPU consumption from infinite loop) via a DNS response with a compressed name pointer that points to itself.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16132
http://www.securityfocus.com/bid/10336
http://www.kb.cert.org/vuls/id/682110
http://www.ciac.org/ciac/bulletins/o-141.shtml
http://securitytracker.com/id?1010146
http://securitytracker.com/id?1010145
http://securitytracker.com/id?1010144
http://securityresponse.symantec.com/avcenter/security/Content/2004.05.12.html
http://secunia.com/advisories/11066
http://lists.grok.org.uk/pipermail/full-disclosure/2004-May/021359.html