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ESB-2008.0031 -- [UNIX/Linux] -- Claws Mail: Insecure temporary file creation

Date: 10 January 2008

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

                       ESB-2008.0031 -- [UNIX/Linux]
               Claws Mail: Insecure temporary file creation
                              10 January 2008

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

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

Product:              Claws Mail
Publisher:            Gentoo
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Overwrite Arbitrary Files
Access:               Existing Account
CVE Names:            CVE-2007-6208

Original Bulletin:    http://security.gentoo.org/glsa/glsa-200801-03.xml

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

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Gentoo Linux Security Advisory                           GLSA 200801-03
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Claws Mail: Insecure temporary file creation
      Date: January 09, 2008
      Bugs: #201244
        ID: 200801-03

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Synopsis
========

Claws Mail uses temporary files in an insecure manner, allowing for a
symlink attack.

Background
==========

Claws Mail is a GTK based e-mail client.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  mail-client/claws-mail     < 3.0.2-r1                 >= 3.0.2-r1

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

Nico Golde from Debian reported that the sylprint.pl script that is
part of the Claws Mail tools creates temporary files in an insecure
manner.

Impact
======

A local attacker could exploit this vulnerability to conduct symlink
attacks to overwrite files with the privileges of the user running
Claws Mail.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Claws Mail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-client/claws-mail-3.0.2-r1"

References
==========

  [ 1 ] CVE-2007-6208
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6208

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

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

  http://security.gentoo.org/glsa/glsa-200801-03.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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You have received this e-mail bulletin as a result of your organisation's
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================

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