SA-CORE-2011-002 – Drupal core – Access bypass

Advisory ID: DRUPAL-SA-CORE-2011-002
Project: Drupal core
Version: 7.x
Date: 2011-JUNE-29
Security risk: Highly critical
Exploitable from: Remote
Vulnerability: Access bypass

Description

CVE: CVE-2011-2687

Access bypass in node listings

Listings showing nodes but not JOINing the node table show all nodes regardless of restrictions imposed by the node_access system. In core, this affects the taxonomy and the forum subsystem.

This issue only affects sites using a node access module such as content access or forum access. If you do not use any node access system then your site is not affected by this vulnerability. It is still considered a best practice to run the latest release and all site owners are encouraged to upgrade when they can regardless of whether or not they are affected.

Note that fixing this issue in contributed modules requires a backwards-compatible API change for modules listing nodes. See http://drupal.org/node/1204572 for more details.

This issue affects Drupal 7.x only.

Versions affected

Drupal 7.0, 7.1 and 7.2.

Solution

Install the latest version:

If you are running Drupal 7.x then upgrade to Drupal 7.3 or 7.4.

The Security Team has released both a pure security update without other bug fixes and a security update combined with other bug fixes and improvements. You can choose to either only include the security update for an immediate fix (which might require less quality assurance and testing) or more fixes and improvements alongside the security fixes by choosing between Drupal 7.3 and Drupal 7.4. Read the announcement for more information.

Reported by

The access bypass was reported independently by numerous people, including Sascha Grossenbacher, Khaled Alhourani, and Ben Ford.

Fixed by

The access bypass was fixed by Károly Négyesi, member 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.

Learn more about the Drupal Security team and their policies, writing secure code for Drupal, and securing your site.

Drupal version:

Drupal 7.x

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