CVE-2017-13721

NameCVE-2017-13721
DescriptionIn X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.
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)
ReferencesDSA-4000-1
NVD severitylow (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xorg-server (PTS)jessie (security), jessie2:1.16.4-1+deb8u2fixed
stretch (security), stretch2:1.19.2-1+deb9u2fixed
buster2:1.19.6-1fixed
sid2:1.20.0-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xorg-serversource(unstable)2:1.19.4-1low
xorg-serversourcejessie2:1.16.4-1+deb8u2lowDSA-4000-1
xorg-serversourcestretch2:1.19.2-1+deb9u2lowDSA-4000-1
xorg-serversourcewheezy(not affected)

Notes

[wheezy] - xorg-server <not-affected> (Vulnerable code introduced later)
https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1

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