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Gentoo Linux Security Advisory                           GLSA 200711-26
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: teTeX: Multiple vulnerabilities
      Date: November 18, 2007
      Bugs: #198238
        ID: 200711-26

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Synopsis
========

Multiple vulnerabilities have been discovered in teTeX, possibly
allowing to execute arbitrary code or overwrite arbitrary files.

Background
==========

teTeX is a complete TeX distribution for editing documents.

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

    -------------------------------------------------------------------
     Package         /   Vulnerable   /                     Unaffected
    -------------------------------------------------------------------
  1  app-text/tetex      < 3.0_p1-r6                      >= 3.0_p1-r6

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

Joachim Schrod discovered several buffer overflow vulnerabilities and
an insecure temporary file creation in the "dvilj" application that is
used by dvips to convert DVI files to printer formats (CVE-2007-5937,
CVE-2007-5936). Bastien Roucaries reported that the "dvips" application
is vulnerable to two stack-based buffer overflows when processing DVI
documents with long \href{} URIs (CVE-2007-5935). teTeX also includes
code from Xpdf that is vulnerable to a memory corruption and two
heap-based buffer overflows (GLSA 200711-22); and it contains code from
T1Lib that is vulnerable to a buffer overflow when processing an overly
long font filename (GLSA 200710-12).

Impact
======

A remote attacker could entice a user to process a specially crafted
DVI or PDF file which could lead to the execution of arbitrary code
with the privileges of the user running the application. A local
attacker could exploit the "dvilj" vulnerability to conduct a symlink
attack to overwrite arbitrary files.

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-3.0_p1-r6"

References
==========

  [ 1 ] CVE-2007-5935
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5935
  [ 2 ] CVE-2007-5936
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5936
  [ 3 ] CVE-2007-5937
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5937
  [ 4 ] GLSA 200710-12
        http://www.gentoo.org/security/en/glsa/glsa-200710-12.xml
  [ 5 ] GLSA 200711-22
        http://www.gentoo.org/security/en/glsa/glsa-200711-22.xml

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

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

  http://security.gentoo.org/glsa/glsa-200711-26.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 2007 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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