Debian Long Term Support / LTS Security Information / 2021 / Security Information -- DLA-2666-1 libx11

Debian Security Advisory

DLA-2666-1 libx11 -- LTS security update

Date Reported:

24 May 2021

Affected Packages:

libx11

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 988737.
In Mitre's CVE dictionary: CVE-2021-31535.

More information:

Roman Fiedler found that libX11, the X11 protocol client library, was vulnerable to protocol command injection due to insufficient validation of arguments to some functions.

For Debian 9 stretch, this problem has been fixed in version 2:1.6.4-3+deb9u4.

We recommend that you upgrade your libx11 packages.

For the detailed security status of libx11 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libx11

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS