CVE-2015-8540

NameCVE-2015-8540
DescriptionInteger underflow in the png_check_keyword function in pngwutil.c in libpng 0.90 through 0.99, 1.0.x before 1.0.66, 1.1.x and 1.2.x before 1.2.56, 1.3.x and 1.4.x before 1.4.19, and 1.5.x before 1.5.26 allows remote attackers to have unspecified impact via a space character as a keyword in a PNG image, which triggers an out-of-bounds read.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-375-1, DSA-3443-1
NVD severityhigh (attack range: remote)
Debian Bugs807694

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libpng (PTS)wheezy, wheezy (security)1.2.49-1+deb7u2fixed
jessie1.2.50-2+deb8u3fixed
jessie (security)1.2.50-2+deb8u2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libpngsource(unstable)(unfixed)high807694
libpngsourcejessie1.2.50-2+deb8u2highDSA-3443-1
libpngsourcesqueeze1.2.44-1+squeeze6highDLA-375-1
libpngsourcewheezy1.2.49-1+deb7u2highDSA-3443-1

Notes

http://www.openwall.com/lists/oss-security/2015/12/10/6
https://sourceforge.net/p/libpng/bugs/244/
http://sourceforge.net/p/libpng/code/ci/d9006f683c641793252d92254a75ae9b815b42ed/
Fixed in 1.0.66, 1.2.56, 1.4.19, and 1.5.26

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