• Advisory ID: DRUPAL-SA-CONTRIB-2015-146
• Project: Twitter (third-party module)
• Version: 6.x, 7.x
• Date: 2015-September-09
• Security risk: 12/25 ( Moderately Critical) AC:Basic/A:User/CI:None/II:Some/E:Exploit/TD:Uncommon
• Vulnerability: Access bypass

Description

This module enables you to pull in public tweets from Twitter accounts, post messages to Twitter to announce content changes, and authenticate using Twitter.

The module doesn’t sufficiently check for access when using the Twitter Post submodule to post messages to Twitter and allows a tweet to be posted to any authenticated account, not just one that the user owns.

The module also doesn’t sufficiently check for access when listing a user’s connected Twitter accounts, allowing any user to change the options for any other account, including deleting the attached Twitter account.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission “post to twitter” in order to post to Twitter, and have either the permission “add twitter accounts” or “add authenticated twitter accounts” in order to access the accounts list.

CVE identifier(s) issued

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

Versions affected

• Twitter 6.x-5.x versions prior to 6.x-5.2.
• Twitter 7.x-5.x versions prior to 7.x-5.9.
• Twitter 7.x-6.x versions prior to 7.x-6.0.

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

Solution

Install the latest version:

• If you use the Twitter 5.x module for Drupal 6.x, upgrade to Twitter 6.x-5.2 or later.
• If you use the Twitter 5.x module for Drupal 7.x, upgrade to Twitter 7.x-5.9 or later.
• If you use the Twitter 6.x module for Drupal 7.x, upgrade to Twitter 7.x-6.0 or later.

Also see the Twitter project page.

Reported by

• Chris Car
• Carl Bowles
• Stein Magne Bjørklund
• Omnia Ibrahim
• Daniel Roman Sabate
• mshepherd
• voughndutch

Fixed by

• adirael
• arcovia
• Michael Nielson
• Damien McKenna, the module maintainer.

Coordinated by

• David Snopek 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