Check Point Advisories

Netgate pfSense Command Injection (CVE-2018-4021)

Check Point Reference: CPAI-2019-0308
Date Published: 12 Feb 2019
Severity: Medium
Last Updated: 20 Mar 2019
Industry Reference:CVE-2018-4021
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? pfSense
Vulnerability Description A command injection vulnerability exists in the administrative interface of Netgate pfSense. The vulnerability is due to improper sanitization of three parameters in requests sent to system. Successful exploitation results in the execution of arbitrary commands as the root user on the target server.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Netgate pfSense Command Injection protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Netgate pfSense Command Injection

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