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Check Point Advisories

PHP Webshell Upload Over HTTP

Check Point Reference: CPAI-2021-0286
Date Published: 24 Jun 2021
Severity: Critical
Last Updated: 24 Jun 2021
Protection Provided by:

Security Gateway
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 R80 / R77 / R75

  1. 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.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  PHP Webshell Upload Over HTTP

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