PublicDateAtUSN: 2015-09-05
Candidate: CVE-2015-6818
PublicDate: 2015-09-06 02:59:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6818
 https://ubuntu.com/security/notices/USN-2944-1
Description:
 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.
Ubuntu-Description:
Notes:
 mdeslaur> as of 2016-03-11, no equivalent fix in libav
Bugs:
Priority: medium
Discovered-by: Mateusz Jurczyk and Gynvael Coldwind
Assigned-to:
CVSS: 

Patches_ffmpeg:
 upstream: http://git.videolan.org/?p=ffmpeg.git;a=commit;h=47f4e2d8960ca756ca153ab8e3e93d80449b8c91
upstream_ffmpeg: needs-triage
precise_ffmpeg: DNE
precise/esm_ffmpeg: DNE
trusty_ffmpeg: DNE
trusty/esm_ffmpeg: DNE
vivid_ffmpeg: not-affected (7:2.5.9-0ubuntu0.15.04.1)
vivid/stable-phone-overlay_ffmpeg: DNE
vivid/ubuntu-core_ffmpeg: DNE
wily_ffmpeg: not-affected (7:2.7.3-0ubuntu0.15.10.1)
xenial_ffmpeg: not-affected (7:2.8.3-1)
yakkety_ffmpeg: not-affected (7:2.8.3-1)
zesty_ffmpeg: not-affected (7:2.8.3-1)
artful_ffmpeg: not-affected (7:2.8.3-1)
bionic_ffmpeg: not-affected (7:2.8.3-1)
devel_ffmpeg: not-affected (7:2.8.3-1)

Patches_libav:
upstream_libav: needs-triage
precise_libav: released (4:0.8.17-0ubuntu0.12.04.2)
precise/esm_libav: DNE (precise was released [4:0.8.17-0ubuntu0.12.04.2])
trusty_libav: not-affected (code not present)
trusty/esm_libav: DNE (trusty was not-affected [code not present])
vivid_libav: ignored (reached end-of-life)
vivid/stable-phone-overlay_libav: DNE
vivid/ubuntu-core_libav: DNE
wily_libav: DNE
xenial_libav: DNE
yakkety_libav: DNE
zesty_libav: DNE
artful_libav: DNE
bionic_libav: DNE
devel_libav: DNE