Array index error in the qtdemux_parse_samples function in gst/qtdemux/qtdemux.c in GStreamer Good Plug-ins (aka gst-plugins-good) 0.10.9 through 0.10.11 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted Sync Sample (aka stss) atom data in a malformed QuickTime media .mov file, related to "mark keyframes."
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.