Gentoo: SquirrelMail Cross-site scripting and IMAP command injection
Posted by Benjamin D. Thomas   
Gentoo SquirrelMail is vulnerable to several cross-site scripting vulnerabilities and IMAP command injection.
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Gentoo Linux Security Advisory                           GLSA 200603-09
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: SquirrelMail: Cross-site scripting and IMAP command
            injection
      Date: March 12, 2006
      Bugs: #123781
        ID: 200603-09

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Synopsis
========

SquirrelMail is vulnerable to several cross-site scripting
vulnerabilities and IMAP command injection.

Background
==========

SquirrelMail is a webmail package written in PHP. It supports IMAP and
SMTP protocols.

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

    -------------------------------------------------------------------
     Package                   /  Vulnerable  /             Unaffected
    -------------------------------------------------------------------
  1  mail-client/squirrelmail       < 1.4.6                   >= 1.4.6

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

SquirrelMail does not validate the right_frame parameter in
webmail.php, possibly allowing frame replacement or cross-site
scripting (CVE-2006-0188). Martijn Brinkers and Scott Hughes discovered
that MagicHTML fails to handle certain input correctly, potentially
leading to cross-site scripting (only Internet Explorer,
CVE-2006-0195). Vicente Aguilera reported that the
sqimap_mailbox_select function did not strip newlines from the mailbox
or subject parameter, possibly allowing IMAP command injection
(CVE-2006-0377).

Impact
======

By exploiting the cross-site scripting vulnerabilities, 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. A remote attacker could exploit the IMAP command
injection to execute arbitrary IMAP commands on the configured IMAP
server.

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-1.4.6"

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

References
==========

  [ 1 ] CVE-2006-0188
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0188
  [ 2 ] CVE-2006-0195
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0195
  [ 3 ] CVE-2006-0377
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0377

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

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

  http://security.gentoo.org/glsa/glsa-200603-09.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 2006 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