Heap-based buffer overflow in Apple QuickTime before 7.7.2 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted movie file with H.264 encoding.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15938
http://www.securitytracker.com/id?1027065
http://www.securityfocus.com/bid/53576
http://support.apple.com/kb/HT5261
http://lists.apple.com/archives/security-announce/2012/May/msg00005.html