GLSA 200501-31: teTeX, pTeX, CSTeX
Posted on: 01/23/2005 08:42 AM

teTeX, pTeX, CSTeX updates are available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200501-31
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http://security.gentoo.org/
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Severity: Normal
Title: teTeX, pTeX, CSTeX: Multiple vulnerabilities
Date: January 23, 2005
Bugs: #75801
ID: 200501-31

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Synopsis
=======

teTeX, pTeX and CSTeX make use of vulnerable Xpdf code which may allow the remote execution of arbitrary code. Furthermore, the xdvizilla script is vulnerable to temporary file handling issues.

Background
=========

teTeX is a complete and open source TeX distribution. CSTeX is another TeX distribution including Czech and Slovak support. pTeX is another alternative that allows Japanese publishing with TeX. xdvizilla is an auxiliary script used to integrate DVI file viewing in Mozilla-based browsers.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-text/tetex < 2.0.2-r5 >= 2.0.2-r5
2 app-text/cstetex < 2.0.2-r1 >= 2.0.2-r1
3 app-text/ptex < 3.1.4-r2 >= 3.1.4-r2
-------------------------------------------------------------------
3 affected packages on all of their supported architectures.
-------------------------------------------------------------------

Description
==========

teTeX, pTeX and CSTeX all make use of Xpdf code and may therefore be vulnerable to the various overflows that were discovered in Xpdf code (CAN-2004-0888, CAN-2004-0889, CAN-2004-1125 and CAN-2005-0064). Furthermore, Javier Fernandez-Sanguino Pena discovered that the xdvizilla script does not handle temporary files correctly.

Impact
=====

An attacker could design a malicious input file which, when processed using one of the TeX distributions, could lead to the execution of arbitrary code. Furthermore, a local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When xdvizilla is called, this would result in the file being overwritten with the rights of the user running the script.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All teTeX users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/tetex-2.0.2-r5"

All CSTeX users should also upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/cstetex-2.0.2-r1"

Finally, all pTeX users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/ptex-3.1.4-r2"

References
=========

[ 1 ] CAN-2004-0888
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0888
[ 2 ] CAN-2004-0889
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0889
[ 3 ] CAN-2004-1125
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1125
[ 4 ] CAN-2005-0064
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064

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

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

http://security.gentoo.org/glsa/glsa-200501-31.xml

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 http://bugs.gentoo.org.

License
======

Copyright 2005 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/2.0


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