Check Point Advisories

Electric Sheep Fencing pfSense Remote Code Execution

Vulnerability
Protection

Check Point Reference:	CPAI-2024-1131
Date Published:	8 Dec 2024
Severity:	Medium
Last Updated:	Sunday 08 December, 2024
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Electric Sheep Fencing pfSense prior to 2.1.1
Vulnerability Description	An input validation error vulnerability exists in Electric Sheep Fencing pfSense firewall. Successful exploitation could lead to remote code execution under the security context of the root user.

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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Electric Sheep Fencing pfSense Remote Code Execution protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Electric Sheep Fencing pfSense Remote Code Execution