[DRUPAL-SA-2005-001] New Drupal release fixes critical security issue

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Drupal security advisory DRUPAL-SA-2005-001
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Advisory ID: DRUPAL-SA-2005-001
Date: 2005-jun-01
Security risk: highly critical
Impact: system access
Where: from remote
Vulnerability: privilege escalation
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Description
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The Drupal Security Team has found that the privilege system of Drupal can
be circumvented in a very special case because an input check is not
implemented properly.

Versions affected
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Drupal 4.4.0, 4.4.1, 4.4.2
Drupal 4.5.0, 4.5.1, 4.5.2
Drupal 4.6.0

Impact
------
If public registration is allowed then it is possible for an attacker
to obtain additional user roles. As a result, an attacker could grant
himself administration privileges.

Solution
--------
Either upgrade or disable public registration:
- If you are running Drupal 4.4.x, then upgrade to Drupal 4.4.3.
- If you are running Drupal 4.5.2, then upgrade to Drupal 4.5.3.
- If you are running Drupal 4.6.0, then upgrade to Drupal 4.6.1.
- If you cannot upgrade immediately, you can secure your site by
  disabling the public registration of Drupal accounts from Drupal's user
  administration screen. Log-in as an administrator, go to "administer >>
  users >> configure" and set the "Public registrations" option to "Only
  site administrators can create new user accounts".

Contact
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The security contact for Drupal can be reached at security_at_drupal.org
or using the form at http://drupal.org/contact.

// Uwe Herman, on behalf of the Drupal Security Team.

-- 
Uwe Hermann <uwe_at_hermann-uwe.de>
http://www.hermann-uwe.de                 | http://www.crazy-hacks.org
http://www.it-services-uh.de              | http://www.phpmeat.org
http://www.unmaintained-free-software.org | http://www.holsham-traders.de