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[ GLSA 200408-02 ] Courier: Cross-site scripting vulnerability in SqWebMail
From: Thierry Carrez <koon () gentoo org>
Date: Wed, 04 Aug 2004 17:51:04 +0200

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Gentoo Linux Security Advisory                           GLSA 200408-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Courier: Cross-site scripting vulnerability in SqWebMail
      Date: August 04, 2004
      Bugs: #58020
        ID: 200408-02

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Synopsis
========

The SqWebMail web application, included in the Courier suite, is
vulnerable to cross-site scripting attacks.

Background
==========

Courier is an integrated mail and groupware server based on open
protocols. It provides ESMTP, IMAP, POP3, webmail, and mailing list
services within a single framework. The webmail functionality included
in Courier called SqWebMail allows you to access mailboxes from a web
browser.

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

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                  Unaffected
    -------------------------------------------------------------------
  1  mail-mta/courier       <= 0.45.6              >= 0.45.6.20040618

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

Luca Legato found that SqWebMail is vulnerable to a cross-site
scripting (XSS) attack. An XSS attack allows an attacker to insert
malicious code into a web-based application. SqWebMail doesn't filter
appropriately data coming from message headers before displaying them.

Impact
======

By sending a carefully crafted message, an attacker can inject and
execute script code in the victim's browser window. This allows to
modify the behaviour of the SqWebMail application, and/or leak session
information such as cookies to the attacker.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of Courier.

Resolution
==========

All Courier users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=mail-mta/courier-0.45.6.20040618"
    # emerge ">=mail-mta/courier-0.45.6.20040618"

References
==========

  [ 1 ] CAN-2004-0591
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0591
  [ 2 ] XSS definition
        http://www.cert.org/advisories/CA-2000-02.html

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

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

    http://security.gentoo.org/glsa/glsa-200408-02.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/1.0

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