[ GLSA 200608-06 ] Courier MTA: Denial of Service vulnerability

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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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

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