CVE-2016-7977

NameCVE-2016-7977
DescriptionGhostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently read arbitrary files via the use of the .libfile operator in a crafted postscript document.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-674-1, DSA-3691-1
NVD severitymedium (attack range: remote)
Debian Bugs839841

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ghostscript (PTS)wheezy9.05~dfsg-6.3+deb7u2vulnerable
wheezy (security)9.05~dfsg-6.3+deb7u7fixed
jessie9.06~dfsg-2+deb8u5fixed
jessie (security)9.06~dfsg-2+deb8u6fixed
stretch (security), stretch9.20~dfsg-3.2+deb9u1fixed
buster, sid9.22~dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ghostscriptsource(unstable)9.19~dfsg-3.1high839841
ghostscriptsourcejessie9.06~dfsg-2+deb8u3mediumDSA-3691-1
ghostscriptsourcewheezy9.05~dfsg-6.3+deb7u3mediumDLA-674-1

Notes

Upstream bug: http://bugs.ghostscript.com/show_bug.cgi?id=697169
Reproducer: http://www.openwall.com/lists/oss-security/2016/09/29/28
Patch: http://git.ghostscript.com/?p=ghostpdl.git;h=8abd22010eb4db0fb1b10e430d5f5d83e015ef70
http://www.openwall.com/lists/oss-security/2016/10/05/7

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