Overview
Drupal released a security advisory, announcing remediation of a highly critical remote code execution vulnerability (CVE-2019-6430), which stems from some field types improperly sanitizing data from non-form sources, leading to potential execution of arbitrary PHP code.
For details, please click the following link:
https://www.drupal.org/sa-core-2019-003
Conditions for Exploiting the Vulnerability
A site is affected by the vulnerability if either of the following conditions is met:
- The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH or POST requests, or
- The site has another web services module enabled, such as JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7.
Affected Versions
- Drupal 8.6.x < 8.6.10
- Drupal 8.5.x (or earlier) < 8.5.11
Note: Drupal versions earlier than 8.5.x are end-of-life and do not receive security coverage.
Unaffected Versions
- Drupal 8.6.10
- Drupal 8.5.11
Solution
Drupal has released updates to fix this vulnerability. Users of the affected versions are advised to upgrade as soon as possible.
Users who cannot perform the upgrade for the time being can adopt the following measures for temporary protection:
Disable all web services modules, or configure the web server to not allow PUT/PATCH/POST requests to web services resources.
Note that web services resources may be available on multiple paths, depending on the configuration of users’ web servers. For Drupal 7, such resources are typically available via paths (clean URLs) and via arguments to the “q” query parameter. For Drupal 8, paths may still function when prefixed with index.php/.
For the detailed procedure and official recommendation, see Drupal’s security advisory at the following link:
https://www.drupal.org/sa-core-2019-003
https://helpx.adobe.com/security/products/acrobat/apsb18-09.html
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS IB is a wholly owned subsidiary of NSFOCUS, an enterprise application and network security provider, with operations in the Americas, Europe, the Middle East, Southeast Asia and Japan. NSFOCUS IB has a proven track record of combatting the increasingly complex cyber threat landscape through the construction and implementation of multi-layered defense systems. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide unified, multi-layer protection from advanced cyber threats.
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