Out-of-bounds array access in gif_copy_img_rect function in FFmpeg

CVE-2013-0864

The gif_copy_img_rect function in libavcodec/gifdec.c in FFmpeg before 1.1.2 performs an incorrect calculation for an "end pointer," which allows remote attackers to have an unspecified impact via crafted GIF data that triggers an out-of-bounds array access.

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