Uniqueness Violation in decode_ihdr_chunk Function in FFmpeg

CVE-2015-6818 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

The decode_ihdr_chunk function in libavcodec/pngdec.c in FFmpeg before 2.7.2 does not enforce uniqueness of the IHDR (aka image header) chunk in a PNG image, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via a crafted image with two or more of these chunks.

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