Ubuntu Security Notice 4487-2 - USN-4487-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM. Todd Carson discovered that libx11 incorrectly handled certain memory operations. A local attacker could possibly use this issue to escalate privileges. Various other issues were also addressed.
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Ubuntu Security Notice USN-4487-2
September 08, 2020
libx11 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in libx11.
Software Description:
- 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 ESM:
libx11-6 2:1.6.2-1ubuntu2.1+esm1
Ubuntu 12.04 ESM:
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:
https://usn.ubuntu.com/4487-2
https://usn.ubuntu.com/4487-1
CVE-2020-14344, CVE-2020-14363