RESTWS - Highly critical - Remote code execution - SA-CONTRIB-2016-040

• Advisory ID: DRUPAL-SA-CONTRIB-2016-040
• Project: RESTful Web Services (third-party module)
• Version: 7.x
• Date: 2016-July-13
• Security risk: 22/25 ( Highly Critical) AC:None/A:None/CI:All/II:All/E:Theoretical/TD:All
• Vulnerability: Arbitrary PHP code execution

Description

This module enables you to expose Drupal entities as RESTful web services.

RESTWS alters the default page callbacks for entities to provide additional functionality.

A vulnerability in this approach allows an attacker to send specially crafted requests resulting in arbitrary PHP execution.

There are no mitigating factors. This vulnerability can be exploited by anonymous users.

CVE identifier(s) issued

• A CVE identifier will be requested, and added upon issuance, in accordance with Drupal Security Team processes.

Versions affected

• RESTful Web Services 7.x-2.x versions prior to 7.x-2.6.
• RESTful Web Services 7.x-1.x versions prior to 7.x-1.7.

Drupal core is not affected. If you do not use the contributed RESTful Web Services module, there is nothing you need to do.

Solution

Install the latest version:

• If you use the RESTful Web Services module for Drupal 7.x, upgrade to RESTful Web Services 7.x-2.6
• If you use the RESTful Web Services module for Drupal 7.x, upgrade to RESTful Web Services 7.x-1.7

Also see the RESTful Web Services project page.

Reported by

• Devin Zuczek

Fixed by

• Klaus Purer of the Drupal Security Team
• Wolfgang Ziegler the module maintainer

Coordinated by

• Klaus Purer of the Drupal Security Team
• Greg Knaddison 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 https://www.drupal.org/contact.

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

Follow the Drupal Security Team on Twitter at https://twitter.com/drupalsecurity