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Gentoo Linux Security Advisory                           GLSA 200502-02
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                                            https://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
================
    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  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:

  https://security.gentoo.org/glsa/200502-02

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 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.

https://creativecommons.org/licenses/by-sa/2.0/