An "integer arithmetic" error in Apple QuickTime 7.2 allows remote attackers to execute arbitrary code via a crafted movie file containing a movie atom with a large size value, which triggers a stack-based buffer overflow.
http://www.vupen.com/english/advisories/2008/2735
http://www.securityfocus.com/bid/26443
http://www.securityfocus.com/archive/1/483717/100/100/threaded
http://support.apple.com/kb/HT3189
http://security.gentoo.org/glsa/glsa-200803-08.xml
http://secunia.com/advisories/32121
http://secunia.com/advisories/29182
http://lists.apple.com/archives/security-announce/2008/Oct/msg00000.html