Heap-based buffer overflow in Apple QuickTime before 7.7 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted STTS atoms in a QuickTime movie file.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15884
http://support.apple.com/kb/HT5002
http://lists.apple.com/archives/security-announce/2011//Aug/msg00000.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html