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Ubuntu Security Notice USN-4487-1
September 02, 2020
libx11 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in libx11.
Software Description:
– 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 LTS:
libx11-6 2:1.6.9-2ubuntu1.1
Ubuntu 18.04 LTS:
libx11-6 2:1.6.4-3ubuntu0.3
Ubuntu 16.04 LTS:
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:
https://usn.ubuntu.com/4487-1
CVE-2020-14344, CVE-2020-14363
Package Information:
https://launchpad.net/ubuntu/+source/libx11/2:1.6.9-2ubuntu1.1
https://launchpad.net/ubuntu/+source/libx11/2:1.6.4-3ubuntu0.3
https://launchpad.net/ubuntu/+source/libx11/2:1.6.3-1ubuntu2.2
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