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Ubuntu Security Notice USN-4487-1

Ubuntu Security Notice USN-4487-1
Posted Sep 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4487-1 - Todd Carson discovered that libx11 incorrectly handled certain memory operations. A local attacker could possibly use this issue to escalate privileges. Jayden Rivers discovered that libx11 incorrectly handled locales. A local attacker could possibly use this issue to escalate privileges.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2020-14344, CVE-2020-14363
SHA-256 | ed9063e4b3c1fca6e984c1c7ab040083e6748d419d186ee7a3a3b6e2ac48ab97

Ubuntu Security Notice USN-4487-1

Change Mirror Download
==========================================================================
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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