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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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