USN-4487-2: libx11 vulnerabilities

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• libx11 - None

Details

USN-4487-1 fixed several vulnerabilities in libx11. This update provides
the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory 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 14.04

• libx11-6 - 2:1.6.2-1ubuntu2.1+esm1

Ubuntu 12.04

• libx11-6 - 2:1.4.99.1-0ubuntu2.5

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

References

• CVE-2020-14344
• CVE-2020-14363

Related notices

• USN-4487-1: libx11, libx11-doc, libx11-6-udeb, libx11-6, libx11-dev, libx11-data, libx11-xcb1, libx11-xcb-dev