In tandem with iTunes 9, Apple has released QuickTime 7.6.4, a minor update to its signature AV playback software. The patch primarily fixes problems with H.264 and/or MPEG-4 playback, which exposed systems to crashes or arbitrary code execution. H.264 vulnerabilities were connected to memory corruption and heap buffer overflows, while an MPEG-4 flaw involved conventional buffer overflows.
