Heap-based buffer overflow in ImageIO in Apple Mac OS X before 10.6.8 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted JPEG2000 image.
http://www.securityfocus.com/bid/48439
http://support.apple.com/kb/HT4723
http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html