A vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple QuickTime. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists in the parsing of mov video files in QuickTimeH264.scalar. A maliciously crafted MDAT atom can cause a heap corruption resulting in the execution of arbitrary code under the context of the current user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/69813/ZDI-08-062.txt
Source: https://packetstormsecurity.com/files/69813/Zero-Day-Initiative-Advisory-08-062.html