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Gentoo Linux Security Advisory                           GLSA 200608-06
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                                            https://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:

  https://security.gentoo.org/glsa/200608-06

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
https://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.

https://creativecommons.org/licenses/by-sa/2.5/