Drupal Core - Critical - Multiple Vulnerabilities - SA-CORE-2015-002

Impersonation (OpenID module - Drupal 6 and 7 - Critical)

A vulnerability was found in the OpenID module that allows a malicious user to log in as other users on the site, including administrators, and hijack their accounts.

This vulnerability is mitigated by the fact that the victim must have an account with an associated OpenID identity from a particular set of OpenID providers (including, but not limited to, Verisign, LiveJournal, or StackExchange).

Open redirect (Field UI module - Drupal 7 - Less critical)

The Field UI module uses a “destinations” query string parameter in URLs to redirect users to new destinations after completing an action on a few administration pages. Under certain circumstances, malicious users can use this parameter to construct a URL that will trick users into being redirected to a 3rd party website, thereby exposing the users to potential social engineering attacks.

This vulnerability is mitigated by the fact that only sites with the Field UI module enabled are affected.

Drupal 6 core is not affected, but see the similar advisory for the Drupal 6 contributed CCK module: SA-CONTRIB-2015-126

Open redirect (Overlay module - Drupal 7 - Less critical)

The Overlay module 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.

Information disclosure (Render cache system - Drupal 7 - Less critical)

On sites utilizing Drupal 7’s render cache system to cache content on the site by user role, private content viewed by user 1 may be included in the cache and exposed to non-privileged users.

This vulnerability is mitigated by the fact that render caching is not used in Drupal 7 core itself (it requires custom code or the contributed Render Cache module to enable) and that it only affects sites that have user 1 browsing the live site. Exposure is also limited if an administrative role has been assigned to the user 1 account (which is done, for example, by the Standard install profile that ships with Drupal core).

CVE identifier(s) issued

• Impersonation (OpenID module - Drupal 6 and 7): CVE-2015-3234 * Open redirect (Field UI module - Drupal 7):CVE-2015-3232 * Open redirect (Overlay module - Drupal 7:CVE-2015-3233 * Information disclosure (Render cache system - Drupal 7):CVE-2015-3231

Versions affected

• Drupal core 6.x versions prior to 6.36
• Drupal core 7.x versions prior to 7.38

Solution

Install the latest version:

• If you use Drupal 6.x, upgrade to Drupal core 6.36
• If you use Drupal 7.x, upgrade to Drupal core 7.38

Also see the Drupal core project page.

Reported by

Impersonation in the OpenID module:

• Vladislav Mladenov
• Christian Mainka
• Christian Koßmann

Open redirect in the Field UI module:

• Michael Smith

Open redirect in the Overlay module:

• Jeroen Vreuls
• David Rothstein of the Drupal Security Team

Information disclosure in the render cache system:

• Nathaniel Catchpole of the Drupal Security Team

Fixed by

Impersonation in the OpenID module:

• Christian Schmidt, OpenID module maintainer
• Christian Mainka
• Christian Koßmann

Open redirect in the Field UI module:

• Yves Chedemois, Field UI module maintainer
• Damien McKenna provisional member of the Drupal Security Team
• Pere Orga of the Drupal Security Team
• David Rothstein of the Drupal Security Team
• Klaus Purer of the Drupal Security Team

Open redirect in the Overlay module:

• Jeroen Vreuls
• Ben Dougherty of the Drupal Security Team
• David Rothstein of the Drupal Security Team
• Katherine Senzee, Overlay module maintainer

Information disclosure in the render cache system:

• David Rothstein of the Drupal Security Team
• Wim Leers
• willzyx

Coordinated by

• The Drupal Security Team