[ GLSA 202012-17 ] D-Bus: Denial of service

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Gentoo Linux Security Advisory                           GLSA 202012-17
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                                            https://security.gentoo.org/
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  Severity: Low
     Title: D-Bus: Denial of service
      Date: December 23, 2020
      Bugs: #755392
        ID: 202012-17

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Synopsis
========

A local Denial of Service vulnerability was discovered in D-Bus.

Background
==========

D-Bus is a message bus system which processes can use to talk to each
other.

Affected packages
=================

     -------------------------------------------------------------------
      Package              /     Vulnerable     /            Unaffected
     -------------------------------------------------------------------
   1  sys-apps/dbus               < 1.12.20                 >= 1.12.20

Description
===========

It was discovered that D-Bus did not properly handle the situation when
two usernames have the same numeric UID.

Impact
======

An attacker could possibly cause a Denial of Service condition or
trigger other undefined behavior, possibly including incorrect
authorization decisions.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All D-Bus users should upgrade to the latest version:

   # emerge --sync
   # emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.12.20"

References
==========

[ 1 ] dbus 1.12.20 security update announcement
 
https://lists.freedesktop.org/archives/ftp-release/2020-July/000758.html

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/202012-17

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5