USN-4487-2: libx11 vulnerabilities

USN-4487-2: libx11 vulnerabilities

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)
Source: USN-4487-2: libx11 vulnerabilities