Drupal Core - Overlay - Less Critical - Open Redirect - SA-CORE-2015-004

The Overlay module in Drupal core displays administrative pages as a layer over the current page (using JavaScript), rather than replacing the page in the browser window. The Overlay module does not sufficiently validate URLs prior to displaying their contents, leading to an open redirect vulnerability.

This vulnerability is mitigated by the fact that it can only be used against site users who have the “Access the administrative overlay” permission, and that the Overlay module must be enabled.

An incomplete fix for this issue was released as part of SA-CORE-2015-002.

CVE identifier(s) issued

• CVE-2015-7943

Versions affected

• Drupal core 7.x versions prior to 7.41.

Solution

Install the latest version:

• If you use Drupal 7.x, upgrade to Drupal 7.41

Also see the Drupal core project page.

Reported by

• Samuel Mortenson
• Pere Orga of the Drupal Security Team

Fixed by

• Pere Orga of the Drupal Security Team
• David Rothstein of the Drupal Security Team

Coordinated by

• The Drupal Security Team