USN-4487-1: libx11 vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• libx11 - None

Details

Todd Carson discovered that libx11 incorrectly handled certain memory
operations. A local attacker could possibly use this issue to escalate
privileges. (CVE-2020-14344)

Jayden Rivers discovered that libx11 incorrectly handled locales. A local
attacker could possibly use this issue to escalate privileges.
(CVE-2020-14363)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

• libx11-6 - 2:1.6.9-2ubuntu1.1

Ubuntu 18.04

• libx11-6 - 2:1.6.4-3ubuntu0.3

Ubuntu 16.04

• libx11-6 - 2:1.6.3-1ubuntu2.2

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

• CVE-2020-14363
• CVE-2020-14344

Related notices

• USN-4487-2: libx11-doc, libx11-xcb1, libx11-6, libx11-data, libx11-6-udeb, libx11-xcb-dev, libx11, libx11-dev