Gentoo: SpamAssassin 3, Vipul's Razor Denial of Service vulnerability
Posted by Benjamin D. Thomas   
Gentoo SpamAssassin and Vipul's Razor are vulnerable to a Denial of Service attack when handling certain malformed messages.
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Gentoo Linux Security Advisory                           GLSA 200506-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: SpamAssassin 3, Vipul's Razor: Denial of Service
            vulnerability
      Date: June 21, 2005
      Bugs: #94722, #95492
        ID: 200506-17

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Synopsis
========

SpamAssassin and Vipul's Razor are vulnerable to a Denial of Service
attack when handling certain malformed messages.

Background
==========

SpamAssassin is an extensible email filter which is used to identify
junk email. Vipul's Razor is a client for a distributed, collaborative
spam detection and filtering network.

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

    -------------------------------------------------------------------
     Package                   /  Vulnerable  /             Unaffected
    -------------------------------------------------------------------
  1  mail-filter/spamassassin       < 3.0.4                   >= 3.0.4
                                                               < 3.0.1
  2  mail-filter/razor              < 2.71                     >= 2.71
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

SpamAssassin and Vipul's Razor contain a Denial of Service
vulnerability when handling special misformatted long message headers.

Impact
======

By sending a specially crafted message an attacker could cause a Denial
of Service attack against the SpamAssassin/Vipul's Razor server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All SpamAssassin users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-filter/spamassassin-3.0.4"

All Vipul's Razor users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-filter/razor-2.71"

References
==========

  [ 1 ] CAN-2005-1266
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1266
  [ 2 ] SpamAssassin Announcement
        http://mail-archives.apache.org/mod_mbox/spamassassin-announce/200506.mbox/%3c17072.35054.586017.822288@proton.pathname.com%3e
  [ 3 ] Vipul's Razor Announcement
        http://sourceforge.net/mailarchive/forum.php?thread_id=7520323&forum_id=4259

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

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

  http://security.gentoo.org/glsa/glsa-200506-17.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