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AUSCERT External Security Bulletin Redistribution
ESB-2020.3019
USN-4487-1: libx11 vulnerabilities
3 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: libx11
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14363 CVE-2020-14344
Reference: ESB-2020.3009
ESB-2020.2787
ESB-2020.2783
ESB-2020.2782
Original Bulletin:
https://usn.ubuntu.com/4487-1/
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USN-4487-1: libx11 vulnerabilities
02 September 2020
Several security issues were fixed in libx11.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o 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
o libx11-6 - 2:1.6.9-2ubuntu1.1
Ubuntu 18.04
o libx11-6 - 2:1.6.4-3ubuntu0.3
Ubuntu 16.04
o 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
o CVE-2020-14363
o CVE-2020-14344
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