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Gentoo Linux Security Advisory                           GLSA 200608-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Courier MTA: Denial of Service vulnerability
      Date: August 04, 2006
      Bugs: #135005
        ID: 200608-06

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Synopsis
========

Courier MTA has fixed a DoS issue related to usernames containing a "="
character.

Background
==========

Courier MTA is an integrated mail and groupware server based on open
protocols.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  mail-mta/courier      < 0.53.2                          >= 0.53.2

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

Courier MTA has fixed a security issue relating to usernames containing
the "=" character, causing high CPU utilization.

Impact
======

An attacker could exploit this vulnerability by sending a specially
crafted email to a mail gateway running a vulnerable version of Courier
MTA.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Courier MTA users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-mta/courier-0.53.2"

References
==========

  [ 1 ] CVE-2006-2659
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2659

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

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

  http://security.gentoo.org/glsa/glsa-200608-06.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/2.5