OAuth2 Client- Moderately Critical – Cross Site Request Forgery – SA-CONTRIB-2016-044

Advisory ID: DRUPAL-SA-CONTRIB-2016-044
Project: OAuth2 Client (third-party module)
Version: 7.x
Date: 2016-August-10
Security risk: 10/25 ( Moderately Critical) AC:Complex/A:None/CI:None/II:None/E:Proof/TD:All
Vulnerability: Cross Site Request Forgery

Description

This module provides an OAuth2 client.

The module does not check the validity of the state parameter, during server-side flow, before getting a token. This may allow a malicious user to feed a fake access_token to another user, and subsequently provide him fake data from the server. This page explains it in more details: http://www.twobotechnologies.com/blog/2014/02/importance-of-state-in-oau…

CVE identifier(s) issued

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

Versions affected

OAuth2 Client 7.x-1.x versions prior to 7.x-1.5.

Drupal core is not affected. If you do not use the contributed OAuth2 Client module, there is nothing you need to do.

Solution

Install the latest version:

If you use the OAuth2 Client module for Drupal 7.x, upgrade to OAuth2 Client 7.x-1.5

Also see the OAuth2 Client project page.

Reported by

Jason Woods

Fixed by

Dashamir Hoxha the module maintainer

Coordinated by

Michael Hess 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

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