SA-CONTRIB-2013-065 - Organic Groups - Access Bypass

This module 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.

The module allows any authenticated user to guess the node ID of private groups, and subscribe to them without approval, thus being able to see their content.
This vulnerability is mitigated by the fact that the permissions to subscribe are set to allow without approval.

Furthermore, misconfiguration of the OG access fields (a.k.a visibility fields) could have lead to nodes not being private even though a site admin would expect them to be private, due to the group default setting.
This vulnerability is mitigated by requiring a non-default configuration where the “Group visibility” field was not attached to the group node, and only the “Group content visibility” was attached to the group-content node.

CVE identifier(s) issued

• CVE-2013-4228

Versions affected

• OG 7.x-2.x versions prior to 7.x-2.3.

Drupal core is not affected. If you do not use the contributed Organic groups 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 OG 7.x-2.3

Also see the Organic groups project page.

Reported by

• Nic Ivy
• Hunter Fox of the Drupal Security Team

Fixed by

• Amitai Burstein the module maintainer
• Roy Segall from Gizra
• Hunter Fox of the Drupal Security Team

Coordinated by

• Hunter Fox of the Drupal Security Team
• David Stoline of the Drupal Security Team