[IT-SecNots] [Security-news] SA-CONTRIB-2012-009 - Revisioning - Access bypass

[security-news AT drupal.org]

  * Advisory ID: DRUPAL-SA-CONTRIB-2012-009
  * Project: Revisioning [1] (third-party module)
  * Version: 7.x
  * Date: 2012-January-18
  * Security risk: Less critical [2]
  * Exploitable from: Remote
  * Vulnerability: Access bypass

-------- DESCRIPTION  
---------------------------------------------------------

This module enables you to create moderation publication workflows, allowing
authors to create content that isn't visible to the public until it has been
approved by a moderator/publisher.

The module's implementation of hook_node_access() assumes that access is to
granted/denied based on the logged-in user's permissions. However, the hook
may be invoked in contexts whereby the access grants are to be returned for a
particular account passed into the hook. This could result in an access
bypass vulnerability if node_access() is called for a specific user account.

This vulnerability happens when using the XML sitemap module which as a
result will disclose the URLs of un-accessible or unpublished content to
anonymous users. The actual content itself is not disclosed.

-------- VERSIONS AFFECTED  
---------------------------------------------------

  * Revisioning 7.x-1.x versions prior to 7.x-1.3.

Drupal core is not affected. If you do not use the contributed Revisioning
[3] module, there is nothing you need to do.

-------- SOLUTION  
------------------------------------------------------------

Install the latest version:

  * If you use the Revisioning module for Drupal 7.x, upgrade to Revisioning
    7.x-1.3 [4].

See also the Revisioning [5] project page.

-------- REPORTED BY  
---------------------------------------------------------

  * Dave Reid [6], Drupal Security Team member
  * Adam Bramley [7]

-------- FIXED BY  
------------------------------------------------------------

  * Dave Reid [8], Drupal Security Team member
  * Rik de Boer [9], module maintainer

-------- COORDINATED BY  
------------------------------------------------------

  * Dave Reid [10], Drupal Security Team member

-------- CONTACT AND MORE INFORMATION  
----------------------------------------

The Drupal security team can be reached at security at drupal.org or via the
contact form at http://drupal.org/contact [11].

Learn more about the Drupal Security team and their policies [12], writing
secure code for Drupal [13], and securing your site [14].


[1] http://drupal.org/project/revisioning
[2] http://drupal.org/security-team/risk-levels
[3] http://drupal.org/project/revisioning
[4] http://drupal.org/node/1407456
[5] http://drupal.org/project/revisioning
[6] http://drupal.org/user/53892
[7] http://drupal.org/user/1036766
[8] http://drupal.org/user/53892
[9] http://drupal.org/user/404007
[10] http://drupal.org/user/53892
[11] http://drupal.org/contact
[12] http://drupal.org/security-team
[13] http://drupal.org/writing-secure-code
[14] http://drupal.org/security/secure-configuration

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