Check Point Advisories

OpenSSL Invalid PSS Parameters Denial of Service (CVE-2015-0208)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0511
Date Published:	14 May 2015
Severity:	High
Last Updated:	Sunday 24 July, 2022
Source:	OpenSSL Project
Industry Reference:	CVE-2015-0208
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	OpenSSL Project OpenSSL prior to 1.0.2a
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 invalid RSA PSS parameters. A remote, unauthenticated attacker can exploit this vulnerability by sending a crafted client certificate to a vulnerable server application that requests it. Successful exploitation will cause the server application to crash, resulting in a denial-of-service condition.

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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the OpenSSL Invalid PSS Parameters 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: OpenSSL Enforcement Violation.
Attack Information: OpenSSL Invalid PSS Parameters Denial of Service