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[ GLSA 200412-17 ] kfax: Multiple overflows in the included TIFF library
From: Sune Kloppenborg Jeppesen <jaervosz () gentoo org>
Date: Sun, 19 Dec 2004 20:15:53 +0100

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Gentoo Linux Security Advisory                           GLSA 200412-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: kfax: Multiple overflows in the included TIFF library
      Date: December 19, 2004
      Bugs: #73795
        ID: 200412-17

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Synopsis
========

kfax contains several buffer overflows potentially leading to execution
of arbitrary code.

Background
==========

KDE is a feature-rich graphical desktop environment for Linux and
Unix-like Operating Systems. kfax (part of kdegraphics) is the KDE fax
file viewer.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  kde-base/kdegraphics       < 3.3.1                    Vulnerable!
    -------------------------------------------------------------------
     NOTE: Certain packages are still vulnerable. See Workaround.

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

Than Ngo discovered that kfax contains a private copy of the TIFF
library and is therefore subject to several known vulnerabilities (see
References).

Impact
======

A remote attacker could entice a user to view a carefully-crafted TIFF
image file with kfax, which would potentially lead to execution of
arbitrary code with the rights of the user running kfax.

Workaround
==========

The KDE Team recommends to remove the kfax binary as well as the
kfaxpart.la KPart:

    rm /usr/kde/3.*/lib/kde3/kfaxpart.la
    rm /usr/kde/3.*/bin/kfax

Note: This will render the kfax functionality useless, if kfax
functionality is needed you should upgrade to the KDE 3.3.2 which is
not stable at the time of this writing.

Resolution
==========

All kfax users should use the workaround as no patches are available
yet.

References
==========

  [ 1 ] KDE Security Advisory: kfax libtiff vulnerabilities
        http://www.kde.org/info/security/advisory-20041209-2.txt
  [ 2 ] GLSA 200410-11
        http://www.gentoo.org/security/en/glsa/glsa-200410-11.xml
  [ 3 ] CAN-2004-0803
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0803
  [ 4 ] CAN-2004-0804
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0804
  [ 5 ] CAN-2004-0886
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0886

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

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

  http://security.gentoo.org/glsa/glsa-200412-17.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 2004 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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