Download Drupal 7.74 / 8.8.11 / 8.9.9 / 9.0.8

Updates have been released for Drupal versions 7.7, 8.8, 8.9 and 9.0. Drupal is a PHP-written, user-friendly and powerful content management platform, with which, for example, websites can be created. It’s simple enough for a novice user, but powerful enough to build a more complex website as well. The program includes a content management platform and a development framework. The updates contain a fix for the following security issue:

Drupal core – Critical – Remote code execution – SA-CORE-2020-012

Project: Drupal core
Date: 2020-November-18
security risk: Critical 17∕25 AC:Basic/A:User/CI:All/II:All/E:Theoretical/TD:Default
Vulnerability: Remote code execution
CVE IDs: CVE-2020-13671

Description: Documented longer list of dangerous file extensions
Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations.

Solution:
Install the latest version:

• If you are using Drupal 9.0, update to Drupal 9.0.8
• If you are using Drupal 8.9, update to Drupal 8.9.9
• If you are using Drupal 8.8 or earlier, update to Drupal 8.8.11
• If you are using Drupal 7, update to Drupal 7.74

Versions of Drupal 8 prior to 8.8.x are end-of-life and do not receive security coverage.

Additionally, it’s recommended that you audit all previously uploaded files to check for malicious extensions. Look specifically for files that include more than one extension, like filename.php.txt or filename.html.gif, without an underscore (_) in the extension. Pay specific attention to the following file extensions, which should be considered dangerous even when followed by one or more additional extensions:

• phar
• php
• pl
• py
• cgi
• asp
• js
• html
• htm
• phtml

This list is not exhaustive, so evaluate security concerns for other unmunged extensions on a case-by-case basis.