Check Point Advisories

DNS Server Bind 9 Response Message Rendering Denial of Service (CVE-2016-2776)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0873
Date Published:	5 Oct 2016
Severity:	Critical
Last Updated:	Thursday 08 December, 2016
Source:
Industry Reference:	CVE-2016-2776
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	DNS Servers
Vulnerability Description	A denial-of-service vulnerability exists in DNS Servers due to a defect in the rendering of messages into packets. A remote attacker may send a specifically modified request in order to trigger the vulnerability.

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 DNS Server Bind 9 Response Message Rendering 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: DNS Server Bind 9 Response Message Rendering Denial of Service