Heap-based buffer overflow in QuickTimeMPEG.qtx in QuickTime in Apple Mac OS X before 10.6.3 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted genl atom in a QuickTime movie file with MPEG encoding, which is not properly handled during decompression.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.