CUPS in Mac OS X 10.3.9 and 10.4.2 allows remote attackers to cause a denial of service (CPU consumption) by sending a partial IPP request and closing the connection.
http://securitytracker.com/id?1014698
http://lists.apple.com/archives/security-announce/2005/Aug/msg00000.html
http://lists.apple.com/archives/security-announce/2005//Aug/msg00001.html