Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.3068
USN-4490-1: X.Org X Server vulnerability
9 September 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: X.Org X Server
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14345
Reference: ESB-2020.3050
Original Bulletin:
https://usn.ubuntu.com/4490-1/
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4490-1: X.Org X Server vulnerability
08 September 2020
X.Org X Server could be made to crash or run programs if it received
specially crafted input.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o xorg-server - X.Org X11 server
o xorg-server-hwe-16.04 - X.Org X11 server
o xorg-server-hwe-18.04 - X.Org X11 server
Details
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled the
XkbSetNames function. A local attacker could possibly use this issue to
escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o xserver-xorg-core - 2:1.20.8-2ubuntu2.4
Ubuntu 18.04
o xserver-xorg-core - 2:1.19.6-1ubuntu4.6
o xserver-xorg-core-hwe-18.04 - 2:1.20.8-2ubuntu2.2~18.04.3
Ubuntu 16.04
o xserver-xorg-core - 2:1.18.4-0ubuntu0.10
o xserver-xorg-core-hwe-16.04 - 2:1.19.6-1ubuntu4.1~16.04.4
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
o CVE-2020-14345
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=+4Z8
-----END PGP SIGNATURE-----