Gentoo: Sendmail Race condition in the handling of asynchronous signals
Posted by Benjamin D. Thomas   
Gentoo Sendmail is vulnerable to a race condition which could lead to the execution of arbitrary code with sendmail privileges.
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Gentoo Linux Security Advisory                           GLSA 200603-21
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Sendmail: Race condition in the handling of asynchronous
            signals
      Date: March 22, 2006
      Bugs: #125623
        ID: 200603-21

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Synopsis
========

Sendmail is vulnerable to a race condition which could lead to the
execution of arbitrary code with sendmail privileges.

Background
==========

Sendmail is a popular mail transfer agent (MTA).

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  mail-mta/sendmail      < 8.13.6                         >= 8.13.6

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

ISS discovered that Sendmail is vulnerable to a race condition in the
handling of asynchronous signals.

Impact
======

An attacker could exploit this via certain crafted timing conditions.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Sendmail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-mta/sendmail-8.13.6"

References
==========

  [ 1 ] CVE-2006-0058
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0058
  [ 2 ] Sendmail Inc. advisory
        http://www.sendmail.com/company/advisory/index.shtml

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

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

  http://security.gentoo.org/glsa/glsa-200603-21.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