Check Point Advisories

Nginx DNS Resolver Denial of Service (CVE-2016-0742)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0274
Date Published:	10 Apr 2016
Severity:	Medium
Last Updated:	Wednesday 03 August, 2016
Source:	Nginx
Industry Reference:	CVE-2016-0742
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	nginx HTTP Server 0.6.18 through 1.9.9
Vulnerability Description	A denial-of-service vulnerability exists in NGINX. The vulnerability is due to nginx dereferencing an invalid pointer while processing certain DNS packets. A remote, man-in-the-middle attacker could exploit this vulnerability by forging UDP packets as if from a trusted DNS 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 Nginx DNS Resolver 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: DNS Enforcement Violation.
Attack Information: Nginx DNS Resolver Denial of Service