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

Background
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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
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-------------------------------------------------------------------
Package / Vulnerable / Unaffected
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1 kde-base/kdegraphics < 3.3.1 Vulnerable!
-------------------------------------------------------------------
=A0 =A0 =A0NOTE: Certain packages are still vulnerable. See Workaround.

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

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

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

Availability
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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?
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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
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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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