[ GLSA 200708-08 ] SquirrelMail G/PGP plugin: Arbitrary code execution

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200708-08
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                                            http://security.gentoo.org/
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  Severity: High
     Title: SquirrelMail G/PGP plugin: Arbitrary code execution
      Date: August 11, 2007
      Bugs: #185010
        ID: 200708-08

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Synopsis
========

Multiple vulnerabilities have been discovered in SquirrelMail, allowing
for the remote execution of arbitrary code.

Background
==========

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

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

    -------------------------------------------------------------------
     Package                   /   Vulnerable   /           Unaffected
    -------------------------------------------------------------------
  1  mail-client/squirrelmail     < 1.4.10a-r2           >= 1.4.10a-r2

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

The functions deletekey(), gpg_check_sign_pgp_mime() and gpg_recv_key()
used in the SquirrelMail G/PGP encryption plugin do not properly escape
user-supplied data.

Impact
======

An authenticated user could use the plugin to execute arbitrary code on
the server, or a remote attacker could send a specially crafted e-mail
to a SquirrelMail user, possibly leading to the execution of arbitrary
code with the privileges of the user running the underlying web server.
Note that the G/PGP plugin is disabled by default.

Workaround
==========

Enter the SquirrelMail configuration directory
(/usr/share/webapps/squirrelmail/version/htdocs/config), then execute
the conf.pl script. Select the plugins menu, then select the gpg plugin
item number in the "Installed Plugins" list to disable it. Press S to
save your changes, then Q to quit.

Resolution
==========

All SquirrelMail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.10a-r2"

References
==========

  [ 1 ] CVE-2005-1924
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1924
  [ 2 ] CVE-2006-4169
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4169

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

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

  http://security.gentoo.org/glsa/glsa-200708-08.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 2007 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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