A Mozilla Firefox security update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200503-31
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http://security.gentoo.org/
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Severity: Normal
Title: Mozilla Firefox: Multiple vulnerabilities
Date: March 25, 2005
Bugs: #86148
ID: 200503-31

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Synopsis
=======

Mozilla Firefox 1.0.2 fixes new security vulnerabilities, including the remote execution of arbitrary code through malicious GIF images or sidebars.



Background
=========

Mozilla Firefox is the popular next-generation browser from the Mozilla project.

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

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Package / Vulnerable / Unaffected
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1 www-client/mozilla-firefox < 1.0.2 >= 1.0.2
2 www-client/mozilla-firefox-bin < 1.0.2 >= 1.0.2
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2 affected packages on all of their supported architectures.
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Description
==========

The following vulnerabilities were found and fixed in Mozilla Firefox:

* Mark Dowd from ISS X-Force reported an exploitable heap overrun in the GIF processing of obsolete Netscape extension 2 (CAN-2005-0399)

* Kohei Yoshino discovered that a page bookmarked as a sidebar could bypass privileges control (CAN-2005-0402)

* Michael Krax reported a new way to bypass XUL security restrictions through drag-and-drop of items like scrollbars (CAN-2005-0401)

Impact
=====

* The GIF heap overflow could be triggered by a malicious GIF image that would end up executing arbitrary code with the rights of the user running Firefox

* By tricking the user into bookmarking a malicious page as a Sidebar, a remote attacker could potentially execute arbitrary code with the rights of the user running the browser

* By setting up a malicious website and convincing users to obey very specific drag-and-drop instructions, attackers may leverage drag-and-drop features to bypass XUL security restrictions, which could be used as a stepping stone to exploit other vulnerabilities

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All Mozilla Firefox users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/mozilla-firefox-1.0.2"

All Mozilla Firefox binary users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=www-client/mozilla-firefox-bin-1.0.2"

References
=========

[ 1 ] CAN-2005-0399
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0399
[ 2 ] CAN-2005-0401
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0401
[ 3 ] CAN-2005-0402
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0402
[ 4 ] Mozilla Security Advisories
http://www.mozilla.org/projects/security/known-vulnerabilities.html

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

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

http://security.gentoo.org/glsa/glsa-200503-31.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