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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                       ESB-2007.0939 -- [UNIX/Linux]
                      teTeX: Multiple vulnerabilities
                             20 November 2007

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              teTeX
Publisher:            Gentoo
Operating System:     Gentoo
                      UNIX variants (UNIX, Linux, OSX)
Impact:               Execute Arbitrary Code/Commands
                      Overwrite Arbitrary Files
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5937 CVE-2007-5936 CVE-2007-5935

Original Bulletin:    http://security.gentoo.org/glsa/glsa-200711-26.xml

Comment: This advisory references vulnerabilities in products which run on
         platforms other than Gentoo. It is recommended that administrators
         running teTeX check for an updated version of the software for
         their operating system.

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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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