USN-4966-2: libx11 vulnerability
25 May 2021
libx11 could allow unintended access to services.
Releases
Packages
- libx11 - X11 client-side library
Details
USN-4966-1 fixed a vulnerability in libx11. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that libx11 incorrectly validated certain parameter
lengths. A remote attacker could possibly use this issue to trick libx11
into emitting extra X protocol requests.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
libx11-6
-
2:1.6.3-1ubuntu2.2+esm1
Available with Ubuntu Pro
Ubuntu 14.04
-
libx11-6
-
2:1.6.2-1ubuntu2.1+esm2
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Related notices
- USN-4966-1: libx11-data, libx11-dev, libx11-6-udeb, libx11-xcb-dev, libx11-6, libx11-doc, libx11, libx11-xcb1