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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                       ESB-2008.0038 -- [UNIX/Linux]
                      Xfce: Multiple vulnerabilities
                              11 January 2008

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Xfce
Publisher:            Gentoo Linux
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-6532 CVE-2007-6531

Ref:                  ESB-2007.1035

Original Bulletin:    http://security.gentoo.org/glsa/glsa-200801-06.xml

Comment: This advisory references vulnerabilities in products which run on
         platforms other than Gentoo. It is recommended that administrators
         running Xfce check for an updated version of the software
         for their operating system.

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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       < 4.4.2                      >= 4.4.2
  2  xfce-base/libxfcegui4       < 4.4.2                      >= 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 ">=xfce-base/xfce4-panel-4.4.2"

All libxfcegui4 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=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

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