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
=================
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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
