CVE-2008-3621
VideoConference in Apple Mac OS X 10.4.11 and 10.5 through 10.5.4 allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via vectors involving H.264 encoded media.
Date published : 2008-09-16
http://lists.apple.com/archives/security-announce//2008/Sep/msg00005.html