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                                  CERT-Renater

                       Note d'Information No. 2004/VULN491
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DATE                      : 17/11/2004

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running SquirrelMail versions prior to 1.4.3a-r2.

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Gentoo Linux Security Advisory                           GLSA 200411-25
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                                             http://security.gentoo.org/
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   Severity: Low
      Title: SquirrelMail: Encoded text XSS vulnerability
       Date: November 17, 2004
       Bugs: #70739
         ID: 200411-25

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Synopsis
========

Squirrelmail fails to properly sanitize user input, which could lead to
a compromise of webmail accounts.

Background
==========

SquirrelMail is a webmail package written in PHP. It supports IMAP and
SMTP, and can optionally be installed with SQL support.

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

     -------------------------------------------------------------------
      Package                   /   Vulnerable   /           Unaffected
     -------------------------------------------------------------------
   1  mail-client/squirrelmail      < 1.4.3a-r2            >= 1.4.3a-r2

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

SquirrelMail fails to properly sanitize certain strings when decoding
specially-crafted headers.

Impact
======

By enticing a user to read a specially-crafted e-mail, an attacker can
execute arbitrary scripts running in the context of the victim's
browser. This could lead to a compromise of the user's webmail account,
cookie theft, etc.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All SquirrelMail users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.3a-r2"

Note: Users with the vhosts USE flag set should manually use
webapp-config to finalize the update.

References
==========

   [ 1 ] SquirrelMail Advisory
         http://article.gmane.org/gmane.mail.squirrelmail.user/21169

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

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

   http://security.gentoo.org/glsa/glsa-200411-25.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 2004 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


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         Les serveurs de référence du CERT-Renater
         http://www.urec.fr/securite
         http://www.cru.fr/securite
         http://www.renater.fr
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         + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
         + 75013 Paris           | email: certsvp@renater.fr     +
         =========================================================