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

http://security.gentoo.org/

Severity:	normal
Title:	Courier MTA: Denial of Service vulnerability
Date:	08/04/2006
Bugs:	#135005
ID:	200608-06

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	Architecture(s)
mail-mta/courier	< 0.53.2	>= 0.53.2	All supported architectures

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

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 https://bugs.gentoo.org.