Check Point Advisories

Six Apart Movable Type Command Injection (CVE-2021-20837)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1812
Date Published:	31 Jul 2023
Severity:	Critical
Last Updated:	Wednesday 09 August, 2023
Source:
Industry Reference:	CVE-2021-20837
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Six Apart Movable Type from 4.0 up to 6.3.11 Six Apart Movable Type from 6.5.0 up to 6.8.2 Six Apart Movable Type from 7.0 up to 7.8.1 Six Apart Movable Type Advanced from 6.5.0 up to 6.8.2 Six Apart Movable Type Advanced from 7.0 up to 7.8.1 Six Apart Movable Type Premium up to 1.46 Six Apart Movable Type Premium Advanced up to 1.46
Vulnerability Description	A command injection vulnerability exists in Six Apart Movable Type. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary commands on the affected system.

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 Six Apart Movable Type Command Injection (CVE-2021-20837) 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: Six Apart Movable Type Command Injection (CVE-2021-20837)