– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Gentoo Linux Security Advisory GLSA 201810-09
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
https://security.gentoo.org/
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

Severity: High
Title: X.Org X Server: Privilege escalation
Date: October 30, 2018
Bugs: #669588
ID: 201810-09

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

Synopsis
========

A vulnerability in X.Org X Server allows local users to escalate
privileges.

Background
==========

The X Window System is a graphical windowing system based on a
client/server model.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 x11-base/xorg-server < 1.20.3 >= 1.20.3

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

An incorrect permission check for -modulepath and -logfile options when
starting Xorg. X server allows unprivileged users with the ability to
log in to the system via physical console to escalate their privileges
and run arbitrary code under root privileges.

Impact
======

A local attacker can escalate privileges to root by passing crafted
parameters to the X.org X server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All X.Org X Server users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=x11-base/xorg-server-1.20.3”

References
==========

[ 1 ] CVE-2018-14665
https://nvd.nist.gov/vuln/detail/CVE-2018-14665

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

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

https://security.gentoo.org/glsa/201810-09

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 2018 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

—–BEGIN PGP SIGNATURE—–
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=I5G2
—–END PGP SIGNATURE—–