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Sicherheit: Mangelnde Rechteprüfung in LibXfont2 und X11
Aktuelle Meldungen Distributionen
Name: Mangelnde Rechteprüfung in LibXfont2 und X11
ID: 201801-10
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Di, 9. Januar 2018, 09:15
Referenzen: https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-16611
Applikationen: LibXfont2, X11

Originalnachricht

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From: Thomas Deutschmann <whissi@gentoo.org>
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <892d1e0e-42f0-2118-d0cc-761da6d4f3b8@gentoo.org>
Subject: [ GLSA 201801-10 ] LibXfont, LibXfont2: Arbitrary file access

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Gentoo Linux Security Advisory GLSA 201801-10
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https://security.gentoo.org/
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Severity: Normal
Title: LibXfont, LibXfont2: Arbitrary file access
Date: January 08, 2018
Bugs: #639064
ID: 201801-10

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Synopsis
========

A vulnerability has been found in LibXfont and LibXfont2 which may
allow for arbitrary file access.

Background
==========

X.Org Xfont library.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 x11-libs/libXfont < 1.5.4 >= 1.5.4
2 x11-libs/libXfont2 < 2.0.3 >= 2.0.3
-------------------------------------------------------------------
2 affected packages

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

It was discovered that libXfont incorrectly followed symlinks when
opening font files.

Impact
======

A local unprivileged user could use this flaw to cause the X server to
access arbitrary files, including special device files.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All LibXfont users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.5.4"

All LibXfont2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont2-2.0.3"

References
==========

[ 1 ] CVE-2017-16611
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-16611

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

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

https://security.gentoo.org/glsa/201801-10

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.

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


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