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Gentoo Linux Security Advisory GLSA 201709-07
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https://security.gentoo.org/
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Severity: Normal
Title: Kpathsea: User-assisted execution of arbitrary code
Date: September 17, 2017
Bugs: #612328
ID: 201709-07

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Synopsis
========

A vulnerability in Kpathsea allows remote attackers to execute
arbitrary commands by manipulating the -tex option from mpost program.

Background
==========

Kpathsea is a library to do path searching. It is used by TeX Live and
others TeX related software.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 dev-libs/kpathsea < 6.2.2_p20160523 >= 6.2.2_p20160523

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

It was discovered that the mpost program from the shell_escape_commands
list is capable of executing arbitrary external programs during the
conversion of .tex files. The responsible function is runpopen()
(texmfmp.c).

Impact
======

A remote attacker, by enticing a user to open a specially crafted .tex
file, could possibly execute arbitrary code with the privileges of the
process.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Kpathsea users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot -v “>=dev-libs/kpathsea-6.2.2_p20160523”

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.

References
==========

[ 1 ] CVE-2016-10243
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-10243

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

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

https://security.gentoo.org/glsa/201709-07

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.

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