Zero Day Initiative Advisory 09-063 – This 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 during the parsing of samples from a malformed MOV file utilizing the H.264 codec. While parsing data to render the stream, the application will mistrust a length that is used to initialize a heap chunk that was allocated in a header. If the length is larger than the size of the chunk allocated, then a memory corruption will occur leading to code execution under the context of the currently logged in user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/81196/ZDI-09-063.txt
Source: https://packetstormsecurity.com/files/81196/Zero-Day-Initiative-Advisory-09-063.html