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 within the Apple ImageIO framework during the parsing of malformed JPEG2000 files. The function CGImageReadGetBytesAtOffset can utilize miscalculated values during a memmove operation that will result in an exploitable heap corruption allowing attackers to execute arbitrary code under the context of the current user.
Patch Availability:
Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT4077
