Zero Day Initiative Advisory 09-015 – This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page. The specific flaw exists in the XUL tree method _moveToEdgeShift(). In some cases this call will trigger garbage collection routines on in use objects which will result in a future call to a dangling pointer. This can be leveraged to execute arbitrary code under the context of the current user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76200/ZDI-09-015.txt
Source: https://packetstormsecurity.com/files/76200/Zero-Day-Initiative-Advisory-09-015.html