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From: Thomas Deutschmann <whissi@gentoo.org>
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <13d5eaed-7f05-b7d5-1f93-6ad5a27eb127@gentoo.org>
Subject: [ GLSA 201706-29 ] KAuth and KDELibs: Privilege escalation

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Gentoo Linux Security Advisory                           GLSA 201706-29
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                                           https://security.gentoo.org/
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 Severity: High
    Title: KAuth and KDELibs: Privilege escalation
     Date: June 27, 2017
     Bugs: #618108
       ID: 201706-29

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Synopsis
========

A vulnerability in KAuth and KDELibs allows local users to gain root
privileges.

Background
==========

KAuth provides a convenient, system-integrated way to offload actions
that need to be performed as a privileged user (root, for example) to
small (hopefully secure) helper utilities.

The KDE libraries, basis of KDE and used by many open source projects.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  kde-frameworks/kauth       < 5.29.0-r1              >= 5.29.0-r1
  2  kde-frameworks/kdelibs      < 4.14.32                 >= 4.14.32
    -------------------------------------------------------------------
     2 affected packages

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

KAuth and KDELibs contains a logic flaw in which the service invoking
D-Bus is not properly checked. This allows spoofing the identity of the
caller and with some carefully crafted calls can lead to gaining root
from an unprivileged account.

Impact
======

A local attacker could spoof the identity of the caller invoking D-Bus,
possibly resulting in gaining privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All KAuth users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose
 ">=kde-frameworks/kauth-5.29.0-r1"

All KDELibs users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose
 ">=kde-frameworks/kdelibs-4.14.32"

References
==========

[ 1 ] CVE-2017-8422
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-8422

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

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

 https://security.gentoo.org/glsa/201706-29

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
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2017 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.

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


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