Check Point Advisories

OpenSSL RSA PSS Absent Mask Generation Parameter Denial of Service (CVE-2015-3194)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0119
Date Published:	17 Feb 2016
Severity:	High
Last Updated:	Tuesday 22 March, 2016
Source:	OpenSSL Project
Industry Reference:	CVE-2015-3194
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	OpenSSL Project OpenSSL prior to 1.0.1q OpenSSL Project OpenSSL prior to 1.0.2e
Vulnerability Description	A denial-of-service vulnerability exists in OpenSSL. The vulnerability is due to a NULL pointer dereference when an OpenSSL application receives and processes a crafted certificate containing an invalid RSA PSS parameter. A remote, unauthenticated attacker can exploit this vulnerability by sending a crafted client certificate to a vulnerable server application that requests

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 OpenSSL RSA PSS Absent Mask Generation Parameter Denial of Service 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: SSL Enforcement Violation.
Attack Information: OpenSSL RSA PSS Absent Mask Generation Parameter Denial of Service