| Name | CVE-2017-13721 |
| Description | In 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4000-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xorg-server (PTS) | jessie, jessie (lts) | 2:1.16.4-1+deb8u17 | fixed |
| stretch (security) | 2:1.19.2-1+deb9u9 | fixed |
| stretch (lts), stretch | 2:1.19.2-1+deb9u20 | fixed |
| buster, buster (lts) | 2:1.20.4-1+deb10u15 | fixed |
| buster (security) | 2:1.20.4-1+deb10u14 | fixed |
| bullseye | 2:1.20.11-1+deb11u13 | fixed |
| bullseye (security) | 2:1.20.11-1+deb11u14 | fixed |
| bookworm (security), bookworm | 2:21.1.7-3+deb12u8 | fixed |
| sid, trixie | 2:21.1.14-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[wheezy] - xorg-server <not-affected> (Vulnerable code introduced later)
https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1