Check Point Advisories

PHP ftp_genlist method Integer Overflow (CVE-2015-4022)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0775
Date Published:	1 Jul 2015
Severity:	Critical
Last Updated:	Sunday 09 August, 2015
Source:	PHP
Industry Reference:	CVE-2015-4022
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	PHP Group PHP prior to 5.6.9
Vulnerability Description	A code execution vulnerability exists in PHP's ftp_genlist() method. The vulnerability is due to lack of integer overflow detection when calculating the size of the response to the FTP LIST command. A remote attacker can exploit the vulnerability by hosting an FTP server and sending crafted ata to a web application running a vulnerable version of PHP.

Protection Overview

This protection will detect and block 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 PHP ftp_genlist method Integer Overflow 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 ftp_genlist method Integer Overflow