Check Point Advisories

strongSwan gmp Plugin Denial of Service (CVE-2017-11185)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0772
Date Published:	19 Sep 2017
Severity:	Medium
Last Updated:	Wednesday 27 September, 2017
Source:	STRONG SWAN
Industry Reference:	CVE-2017-11185
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	strongSwan strongSwan prior to 5.6.0
Vulnerability Description	A denial-of-service vulnerability exists in strongSwan. The vulnerability is due to insufficient validation of RSA signature values before their use within the gmp plugin. A remote attacker could exploit this vulnerability by sending a crafted message to the target server.

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 strongSwan gmp Plugin 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: IKE Protection Violation.
Attack Information: strongSwan gmp Plugin Denial of Service