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Ubuntu 20.04 LTS: USN-4487-1 Critical: Libx11 Privilege Escalation

ubuntu
Calendar Grey September 2, 2020
Dist Ubuntu Esm H88
Critical vulnerabilities in libx11 have been addressed. Upgrade your Ubuntu system to bolster security and mitigate potential risks.
Several security issues were fixed in libx11.

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)

Topics%20covered

Topics Covered

security advisory privilege escalation local attack ubuntu libx11 September 2020

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://ubuntu.com/security/notices/USN-4487-1

CVE-2020-14344, CVE-2020-14363

Severity
critical
Lowest
Low
Medium
High
Critical

September 02, 2020

Topics%20covered

Topics Covered

security advisory privilege escalation local attack ubuntu libx11 September 2020

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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