Check Point Advisories

WordPress Core Phar Insecure Deserialization

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0846
Date Published:	20 Aug 2018
Severity:	High
Last Updated:	Monday 20 August, 2018
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	WordPress Core 4.9 and above
Vulnerability Description	An insecure deserialization vulnerability exists in WordPress core. The vulnerability is due to the lack of input validation in PHP phar stream wrapper. Successful exploitation of this vulnerability could allow a remote authenticated attacker with at least author-level privileges to execute arbitrary code 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 R80 / R77 / R75

In the IPS tab, click Protections and find the WordPress Core Phar Insecure Deserialization 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: WordPress Enforcement Protection.
Attack Information: WordPress Core Phar Insecure Deserialization