Check Point Advisories

PHP Webshell Upload Over HTTP

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0286
Date Published:	24 Jun 2021
Severity:	Critical
Last Updated:	Monday 07 October, 2024
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	An attacker might upload a webshell backdoor to a PHP server. A successful exploitation might allow the attacker to run arbitrary code, or use the server as a bot for further attacks.

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 PHP Webshell Upload Over HTTP 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: PHP Webshell Upload Over HTTP