From: Sune Kloppenborg Jeppesen <jaervosz@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200612-05 ] KOffice shared libraries: Heap corruption
Date: Sun, 10 Dec 2006 16:03:12 +0100
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Cc: bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk,
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Organization: Gentoo Linux Security Team
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Gentoo Linux Security Advisory GLSA 200612-05
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http://security.gentoo.org/
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Severity: Normal
Title: KOffice shared libraries: Heap corruption
Date: December 10, 2006
Bugs: #155914
ID: 200612-05
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Synopsis
========
An integer overflow in koffice-libs allows for a Denial of Service and
possibly the execution of arbitrary code when viewing malicious
PowerPoint files.
Background
==========
KOffice is an integrated office suite for KDE. koffice-libs is a
package containing shared librares used by KOffice programs.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-office/koffice-libs < 1.5.0 >= 1.5.0
Description
===========
Kees Cook of Ubuntu discovered that 'KLaola::readBigBlockDepot()' in
klaola.cc fills 'num_of_bbd_blocks' while reading a .ppt (PowerPoint)
file without proper sanitizing, resulting in an integer overflow
subsequently overwriting the heap with parts of the file being read.
Impact
======
By enticing a user to open a specially crafted PowerPoint file, an
attacker could crash the application and possibly execute arbitrary
code with the rights of the user running KOffice.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All koffice-libs users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-office/koffice-libs-1.5.0"
References
==========
[ 1 ] CVE-2006-6120
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6120
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200612-05.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 2006 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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