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Gentoo Linux Security Advisory                           GLSA 200604-09
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Cyrus-SASL: DIGEST-MD5 Pre-Authentication Denial of Service
      Date: April 21, 2006
      Bugs: #129523
        ID: 200604-09

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Synopsis
========

Cyrus-SASL contains a vulnerability in the DIGEST-MD5 process that
could lead to a Denial of Service.

Background
==========

Cyrus-SASL is an implementation of the Simple Authentication and
Security Layer.

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

    -------------------------------------------------------------------
     Package              /   Vulnerable   /                Unaffected
    -------------------------------------------------------------------
  1  dev-libs/cyrus-sasl      < 2.1.21-r2                 >= 2.1.21-r2

Description
===========

Cyrus-SASL contains an unspecified vulnerability in the DIGEST-MD5
process that could lead to a Denial of Service.

Impact
======

An attacker could possibly exploit this vulnerability by sending
specially crafted data stream to the Cyrus-SASL server, resulting in a
Denial of Service even if the attacker is not able to authenticate.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Cyrus-SASL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/cyrus-sasl-2.1.21-r2"

References
==========

  [ 1 ] CVE-2006-1721
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1721

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

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

  http://security.gentoo.org/glsa/glsa-200604-09.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/2.0