QuickTime in Apple Mac OS X 10.6.x before 10.6.5 accesses uninitialized memory locations during processing of JP2 image data, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted JP2 file.
http://www.securitytracker.com/id?1024729
http://support.apple.com/kb/HT4447
http://support.apple.com/kb/HT4435
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
http://lists.apple.com/archives/security-announce/2010//Dec/msg00000.html