ImageIO in Apple Mac OS X 10.4.11 and 10.5.8 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PixarFilm encoded TIFF image, related to "multiple memory corruption issues."
https://exchange.xforce.ibmcloud.com/vulnerabilities/53170
http://www.securityfocus.com/bid/36359
http://support.apple.com/kb/HT3865
http://secunia.com/advisories/36701
http://lists.apple.com/archives/security-announce/2009/Sep/msg00004.html