The roq_decode_init function in libavcodec/roqvideodec.c in FFmpeg before 1.1 allows remote attackers to have an unspecified impact via a crafted (1) width or (2) height dimension that is not a multiple of sixteen in id RoQ video data. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0849
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