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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