GLSA 200801-06 Xfce: Multiple vulnerabilities

Gentoo Linux Security Advisory GLSA 200801-06:02
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http://security.gentoo.org/
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Severity: Normal
Title: Xfce: Multiple vulnerabilities
Date: January 09, 2008
Updated: January 09, 2008
Bugs: #201292, #201293
ID: 200801-06:02

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Synopsis
========

Multiple vulnerabilities in Xfce might allow user-assisted attackers to
execute arbitrary code.

Background
==========

Xfce is a GTK+ 2 based desktop environment that allows to run a modern
desktop environment on modest hardware.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 xfce-base/xfce4-panel lt; 4.4.2 gt;= 4.4.2
2 xfce-base/libxfcegui4 lt; 4.4.2 gt;= 4.4.2
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

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

Gregory Andersen reported that the Xfce4 panel does not correctly
calculate memory boundaries, leading to a stack-based buffer overflow
in the launcher_update_panel_entry() function (CVE-2007-6531). Daichi
Kawahata reported libxfcegui4 did not copy provided values when
creating "SessionClient" structs, possibly leading to access of freed
memory areas (CVE-2007-6532).

Impact
======

A remote attacker could entice a user to install a specially crafted
"rc" file to execute arbitrary code via long strings in the "Name" and
"Comment" fields or via unspecified vectors involving the second
vulnerability.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Xfce4 panel users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=xfce-base/xfce4-panel-4.4.2"

All libxfcegui4 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=xfce-base/libxfcegui4-4.4.2"

Please refer to the Upgrading section of the Xfce Configuration Guide
in case you are upgrading from Xfce 4.2.

References
==========

[ 1 ] CVE-2007-6531
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6531
[ 2 ] CVE-2007-6532
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6532
[ 3 ] Xfce Configuration Guide
http://www.gentoo.org/doc/en/xfce-config.xml

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

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

http://security.gentoo.org/glsa/glsa-200801-06.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 2008 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