A Vulnerability in Drupal Could Allow for Remote Code Execution

ITS Advisory Number: 
2018-034 - UPDATED
Date(s) Issued: 
Wednesday, March 28, 2018
Date Updated: 
Monday, April 16, 2018
Subject: 
A Vulnerability in Drupal Could Allow for Remote Code Execution
Overview: 

A vulnerability has been discovered in the Drupal core module which could allow for remote code execution. Drupal is an open source content management system (CMS) written in PHP. Successful exploitation of this vulnerability could allow for remote code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

ORIGINAL THREAT INTELLIGENCE:
There are currently no reports of this vulnerability being exploited in the wild.

APRIL 16th – UPDATED THREAT INTELLIGENCE:
There are reports of CVE-2018-7600 being actively exploited in the wild to drop malware and cryptojackers. POC code for this exploit is also available.

Systems Affected: 

• Drupal Core versions prior to 7.58 and 8.5.1
• Drupal Core version 6
• Drupal Core version 8.3.x
• Drupal Core version 8.4.x

RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
High
Small business entities: 
High
Home Users: 
Low
Description: 

A vulnerability has been discovered in Drupal core module which could allow for remote code execution. The vulnerability appears to exist within several subsytems of Drupal versions that could result in a site being completely compromised site.

Successful exploitation of this vulnerability could allow for remote code execution. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

Actions: 

• After appropriate testing, immediately apply the updates provided by Drupal to vulnerable systems.
• Ensure no unauthorized systems changes have occurred before applying patches.
• Run all software as a non-privileged user to diminish effects of a successful attack.
• Apply the Principle of Least Privilege to all systems and services.
• Drupal versions 6, 8.3.x and 8.4.x sites should be migrated to supported Drupal versions as soon as possible after patches are applied.