Multiple vulnerabilities has been identified and fixed in ffmpeg: oggparsevorbis.c in FFmpeg 0.5 does not properly perform certain pointer arithmetic, which might allow remote attackers to obtain sensitive memory contents and cause a denial of service via a crafted file that triggers an out-of-bounds read. vorbis_dec.c in FFmpeg 0.5 uses an assignment operator when a comparison operator was intended, which might allow remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted file that modifies a loop counter and triggers a heap-based buffer overflow. Multiple integer underflows in FFmpeg 0.5 allow remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted file that bypasses a validation check in vorbis_dec.c and triggers a wraparound of the stack pointer, or access a pointer from out-of-bounds memory in mov.c, related to an elst tag that appears before a tag that creates a stream. FFmpeg 0.5 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted MOV container with improperly ordered tags that cause mov.c and utils.c to use inconsistent codec types and identifiers, which causes the mp3 decoder to process a pointer for a video structure, leading to a stack-based buffer overflow. FFmpeg 0.5 allows remote attackers to cause a denial of service via a crafted file that triggers an infinite loop. The av_rescale_rnd function in the AVI demuxer in FFmpeg 0.5 allows remote attackers to cause a denial of service via a crafted AVI file that triggers a divide-by-zero error. Array index error in vorbis_dec.c in FFmpeg 0.5 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted Vorbis file that triggers an out-of-bounds read. flicvideo.c in libavcodec 0.6 and earlier in FFmpeg, as used in MPlayer and other products, allows remote attackers to execute arbitrary code via a crafted flic file, related to an arbitrary offset dereference vulnerability. Fix memory corruption in WMV parsing libavcodec/vorbis_dec.c in the Vorbis decoder in FFmpeg 0.6.1 and earlier allows remote attackers to cause a denial of service via a crafted .ogg file, related to the vorbis_floor0_decode function. Multiple buffer overflows in vorbis_dec.c in the Vorbis decoder in FFmpeg, as used in Google Chrome before 8.0.552.237 and Chrome OS before 8.0.552.344, allow remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted WebM file, related to buffers for the channel floor and the channel residue. Fix heap corruption crashes Fix invalid reads in VC-1 decoding And several additional vulnerabilites originally discovered by Google Chrome developers were also fixed with this advisory. The updated packages have been patched to correct these issues.