Project: 
Printer, email and PDF versions
Date: 
2018-October-03
Security risk: 
Highly critical 20 ∕ 25 AC:None/A:None/CI:All/II:All/E:Theoretical/TD:Uncommon
Vulnerability: 
Remote Code Execution
Description: 

This module provides printer-friendly versions of content, including send by e-mail and PDF versions.

The module doesn't sufficiently sanitize the arguments passed to the wkhtmltopdf executable, allowing a remote attacker to execute arbitrary shell commands. It also doesn't sufficiently sanitize the HTML content passed to dompdf, allowing a privileged attacker to execute arbitrary PHP code.

This vulnerability is mitigated by the fact that the site must have either the wkhtmltopdf or dompdf sub-modules enabled and selected as the PDF generation tool. In the case of the dompdf vulnerability, the attacker must be able to write content to the site.

Solution: 

Install the latest version:

  • If you use the print module for Drupal 7.x, upgrade to print 7.x-2.1

In alternative, disable PDF generation, or replace the PDF generation library with another of the supported versions.

Also see the Printer, email and PDF versions project page.

Reported By: 
Fixed By: 
Coordinated By: