GLSA 200608-06 Courier MTA: Denial of Service vulnerability

Posted by Bob on: 08/04/2006 06:22 AM [ Print | 0 comment(s) ]

A new security update has been released for Gentoo Linux - Courier MTA: Denial of Service vulnerability. Here the announcement:

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 lt; 0.53.2 gt;= 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 "gt;=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