[ GLSA 202107-31 ] polkit: Privilege escalation

John Helmert III <[email protected]> Mon, 12 Jul 2021 21:32:32 -0500
Newsgroups	gmane.linux.gentoo.announce
Message-ID	<[email protected]>
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Gentoo Linux Security Advisory                           GLSA 202107-31
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                                           https://security.gentoo.org/
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 Severity: High
    Title: polkit: Privilege escalation
     Date: July 13, 2021
     Bugs: #794052
       ID: 202107-31

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Synopsis
========

A vulnerability in polkit could lead to local root privilege
escalation.

Background
==========

polkit is a toolkit for managing policies related to unprivileged
processes communicating with privileged process.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-auth/polkit              < 0.119                    >= 0.119 

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

The function polkit_system_bus_name_get_creds_sync() was called without
checking for error, and as such temporarily treats the authentication
request as coming from root.

Impact
======

Please review the referenced CVE identifiers for details.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All polkit users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-auth/polkit-0.119"

References
==========

[ 1 ] CVE-2021-3560
      https://nvd.nist.gov/vuln/detail/CVE-2021-3560

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

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

 https://security.gentoo.org/glsa/202107-31

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 2021 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
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