[Security-news] SA-CONTRIB-2011-050 - Organic groups - Access bypass

[security-news at drupal.org]

  * Advisory ID: DRUPAL-SA-CONTRIB-2011-050
  * Project: Organic groups [1] (third-party module)
  * Version: 7.x
  * Date: 2011-October-26
  * Security risk: Moderately critical [2]
  * Exploitable from: Remote
  * Vulnerability: Access bypass

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

Organic groups (OG) enables users to create and manage their own 'groups'.
Each group can have subscribers, and maintains a group home page where
subscribers communicate amongst themselves.
OG has an API function to check access to an entity which is in a group
"context". When the entity isn't in a group context, OG takes a permissive
approach and allows access to the entity. Implementing modules such as
Profile2 that try to check access on a non group/group content might result
in access bypass

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

  * Organic Groups 7.x-1.x versions prior to 7.x-1.2.

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

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

Install the latest version:

  * If you use the Organic Groups module for Drupal 7.x, upgrade to Organic
    Groups 7.x-1.2 [4]

See also the Organic groups [5] project page.

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

  * Matthias Hutterer (mh86) [6]

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

  * Wolfgang Ziegler (fago) [7]
  * Amitai Burstein (Amitaibu) [8] the module maintainer

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

  * Greg Knaddison [9] of the Drupal Security Team

-------- 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 [10].

Learn more about the Drupal Security team and their policies [11], writing
secure code for Drupal [12], and securing your site [13].


[1] http://drupal.org/project/og
[2] http://drupal.org/security-team/risk-levels
[3] http://drupal.org/project/og
[4] http://drupal.org/node/1322344
[5] http://drupal.org/project/og
[6] http://drupal.org/user/59747
[7] http://drupal.org/user/16747
[8] http://drupal.org/user/57511
[9] http://drupal.org/user/36762
[10] http://drupal.org/contact
[11] http://drupal.org/security-team
[12] http://drupal.org/writing-secure-code
[13] http://drupal.org/security/secure-configuration