Full Disclosure: [ GLSA 200907-09 ] Cyrus-SASL: Execution of arbitrary code

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200907-09
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Cyrus-SASL: Execution of arbitrary code
      Date: July 12, 2009
      Bugs: #270261
        ID: 200907-09

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Synopsis
========

A buffer overflow in Cyrus-SASL might allow for the execution of
arbitrary code in applications or daemons that authenticate using SASL.

Background
==========

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

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  dev-libs/cyrus-sasl      < 2.1.23                       >= 2.1.23

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

James Ralston reported that in certain situations, Cyrus-SASL does not
properly terminate strings which can result in buffer overflows when
performing Base64 encoding.

Impact
======

A remote unauthenticated user might send specially crafted packets to a
daemon using Cyrus-SASL, possibly resulting in the execution of
arbitrary code with the privileges of the user running the daemon or a
Denial of Service.

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-2.1.23"

References
==========

  [ 1 ] CVE-2009-0688
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0688

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

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

  http://security.gentoo.org/glsa/glsa-200907-09.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 2009 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

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