CVE-2016-9773

NameCVE-2016-9773
DescriptionHeap-based buffer overflow in the IsPixelGray function in MagickCore/pixel-accessor.h in ImageMagick 7.0.3.8 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted image file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9556.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
imagemagick (PTS)jessie8:6.8.9.9-5+deb8u12fixed
jessie (security)8:6.8.9.9-5+deb8u14fixed
stretch8:6.9.7.4+dfsg-11+deb9u3fixed
stretch (security)8:6.9.7.4+dfsg-11+deb9u6fixed
buster, sid8:6.9.10.8+dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
imagemagicksource(unstable)(not affected)

Notes

- imagemagick <not-affected> (Affects only the ImageMagick-7 branch, cf. NOTE)
Fixed by: https://github.com/ImageMagick/ImageMagick/commit/4e8c2ed53fcb54a34b3a6185b2584f26cf6874a3
https://blogs.gentoo.org/ago/2016/12/01/imagemagick-heap-based-buffer-overflow-in-ispixelgray-pixel-accessor-h-incomplete-fix-for-cve-2016-9556/
https://github.com/ImageMagick/ImageMagick/issues/312
Upstream statement: https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=31045

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