Home / mailings [gentoo-announce] [ GLSA 201709-07 ] Kpathsea: User-assisted execution of arbitrary code
Posted on 17 September 2017
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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.
http://creativecommons.org/licenses/by-sa/2.5
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