ImageIO in Apple Mac OS X 10.4.11 and 10.5 through 10.5.4 allows context-dependent attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a crafted TIFF image.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45167
http://www.vupen.com/english/advisories/2008/3107
http://www.vupen.com/english/advisories/2008/2584
http://www.us-cert.gov/cas/techalerts/TA08-260A.html
http://www.securitytracker.com/id?1020876
http://www.securityfocus.com/bid/31189
http://support.apple.com/kb/HT3298
http://support.apple.com/kb/HT3276
http://secunia.com/advisories/32706
http://secunia.com/advisories/31882
http://lists.apple.com/archives/security-announce//2008/Sep/msg00005.html
http://lists.apple.com/archives/security-announce//2008/Nov/msg00001.html