Date: Tue, 27 Feb 2007 16:23:51 +0100
From: Raphael Marichez <falco@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200702-12 ] CHMlib: User-assisted remote execution of arbitrary code
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Gentoo Linux Security Advisory GLSA 200702-12
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http://security.gentoo.org/
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Severity: Normal
Title: CHMlib: User-assisted remote execution of arbitrary code
Date: February 27, 2007
Bugs: #163989
ID: 200702-12
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Synopsis
========
A memory corruption vulnerability in CHMlib could lead to the remote
execution of arbitrary code.
Background
==========
CHMlib is a library for the MS CHM (Compressed HTML) file format plus
extracting and HTTP server utils.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-doc/chmlib < 0.39 >= 0.39
Description
===========
When certain CHM files that contain tables and objects stored in pages
are parsed by CHMlib, an unsanitized value is passed to the alloca()
function resulting in a shift of the stack pointer to arbitrary memory
locations.
Impact
======
An attacker could entice a user to open a specially crafted CHM file,
resulting in the execution of arbitrary code with the permissions of
the user viewing the file.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All CHMlib users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-doc/chmlib-0.39"
References
==========
[ 1 ] Original Advisory
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=468
[ 2 ] CVE-2007-0619
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0619
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200702-12.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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