Gentoo: GLSA-202012-17: D-Bus: Denial of service

Date 23 Dec 2020

Category Gentoo Linux Distribution - Security Advisories

110

Posted By LinuxSecurity Advisories

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

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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
This email address is being protected from spambots. You need JavaScript enabled to view it. 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