-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

                      ESB-2005.0076 -- GLSA 200501-31
             Multiple vulnerabilities in teTeX, pTeX and CSTeX
                              25 January 2005

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

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

Product:           teTeX
                   pTeX
                   CSTeX
Operating System:  UNIX variants
                   Linux variants
Impact:            Execute Arbitrary Code/Commands
                   Overwrite Arbitrary Files
Access:            Remote/Unauthenticated
                   Existing Account
CVE Names:         CAN-2005-0064 CAN-2004-1125 CAN-2004-0889
                   CAN-2004-0888

- --------------------------BEGIN INCLUDED TEXT--------------------

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200501-31
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: teTeX, pTeX, CSTeX: Multiple vulnerabilities
      Date: January 23, 2005
      Bugs: #75801
        ID: 200501-31

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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


- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================

-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQCVAwUBQfWkFCh9+71yA2DNAQIlegP/T7cQu1D5j47YCFfdZTrd32KSFZwUFZOt
d0QuUZbVj4nGp+t1IlbGWvTphxvOYWDhpExkzHMEWA1X3Icd4pXkJIBePINB0rQg
dsvZsUh0uiIIQco9xrntDgbi8+IBlY7vGOH3omtJIoNnYHkolecERgOBgUnEyMov
L2leXVzBO+A=
=sfgv
-----END PGP SIGNATURE-----