by David Snopek on March 8, 2017 - 12:41pm

As you may know, Drupal 6 has reached End-of-Life (EOL) which means the Drupal Security Team is no longer doing Security Advisories or working on security patches for Drupal 6 core or contrib modules - but the Drupal 6 LTS vendors are and we're one of them!

Today, there is a Highly Critical security release for the Services module to fix a Remote Code Execution (RCE) vulnerability.

The Services module provides a standardized solution for building API's so that external clients can communicate with Drupal.

The module accepts user submitted data in PHP's serialization format ("Content-Type: application/vnd.php.serialized") which can lead to arbitrary remote code execution.

This vulnerability is mitigated by the fact that an attacker must know your Service Endpoint's path, and your Service Endpoint must have "application/vnd.php.serialized" enabled as a request parser.

See the security advisory for Drupal 7 for more information.

Here you can download the Drupal 6 patch.

NOTE: there's a pre-existing, unfixed security issue in the Drupal 6 version of Services from 2013 (see SA-CONTRIB-2013-051 - Services - Cross site request forgery (CSRF)), so using Services in Drupal 6 isn't recommended in general, however, that issue is much less critical than the one announced today.

If you have a Drupal 6 site using the Services module, we recommend you update immediately, or disable the Services module entirely.

If you'd like all your Drupal 6 modules to receive security updates and have the fixes deployed the same day they're released, please check out our D6LTS plans.

Note: if you use the myDropWizard module (totally free!), you'll be alerted to these and any future security updates, and will be able to use drush to install them (even though they won't necessarily have a release on Drupal.org).

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