GLSA 200502-02: UW IMAP: CRAM-MD5 authentication bypass
Posted on: 02/02/2005 05:43 AM

An UW IMAP security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200502-02
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http://security.gentoo.org/
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Severity: Normal
Title: UW IMAP: CRAM-MD5 authentication bypass
Date: February 02, 2005
Bugs: #79874
ID: 200502-02

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Synopsis
=======

UW IMAP contains a vulnerability in the code handling CRAM-MD5 authentication allowing authentication bypass.

Background
=========

UW IMAP is the University of Washington IMAP toolkit which includes POP3 and IMAP daemons.

Affected packages
================

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Package / Vulnerable / Unaffected
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1 net-mail/uw-imap <= 2004a >= 2004b

Description
==========

A logic bug in the code handling CRAM-MD5 authentication incorrectly specifies the condition for successful authentication.

Impact
=====

An attacker could exploit this vulnerability to authenticate as any mail user on a server with CRAM-MD5 authentication enabled.

Workaround
=========

Disable CRAM-MD5 authentication.

Resolution
=========

All UW IMAP users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/uw-imap-2004b"

References
=========

[ 1 ] US-CERT VU#702777
http://www.kb.cert.org/vuls/id/702777

Availability
===========

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200502-02.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 2005 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/2.0


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