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Services – Critical – Arbitrary Code Execution – SA-CONTRIB-2017-029

Advisory ID: DRUPAL-SA-CONTRIB-2016-029
Project: Services (third-party module)
Version: 7.x
Date: 2017-March-08
Security risk: 21/25 ( Highly Critical) AC:None/A:None/CI:All/II:All/E:Theoretical/TD:Default
Vulnerability: Arbitrary PHP code execution
Description
This 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.

CVE identifier(s) issued
A CVE identifier will be requested, and added upon issuance, in accordance with Drupal Security Team processes.
Versions affected
Services 7.x-3.x versions prior to 7.x-3.19.
Drupal core is not affected. If you do not use the contributed Services module, there is nothing you need to do.
Solution
Install the latest version:
If you use the Services 3.x module for Drupal 7.x, upgrade to Services 7.x-3.19
You may disable “application/vnd.php.serialized” under “Request parsing” in Drupal to prevent


 

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