ESB-2021.1316 – [Debian] xorg-server: Increased privileges – Existing account

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1316
                        xorg-server security update
                               20 April 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           xorg-server
Publisher:         Debian
Operating System:  Debian GNU/Linux
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-3472  

Reference:         ESB-2021.1295
                   ESB-2021.1283
                   ESB-2021.1227

Original Bulletin: 
   http://www.debian.org/security/2021/dsa-4893

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Debian Security Advisory DSA-4893-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
April 19, 2021                        https://www.debian.org/security/faq
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Package        : xorg-server
CVE ID         : CVE-2021-3472

Jan-Niklas Sohn discovered that missing input sanitising in the XInput
extension of the X.org X server may result in privilege escalation if
the X server is running privileged.

For the stable distribution (buster), this problem has been fixed in
version 2:1.20.4-1+deb10u3.

We recommend that you upgrade your xorg-server packages.

For the detailed security status of xorg-server please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/xorg-server

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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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
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Contact information for the authors of the original document is included
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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.
===========================================================================
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