Check Point Advisories

ISC BIND DNSSEC Validation Denial of Service (CVE-2015-4620)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-1154
Date Published:	6 Oct 2015
Severity:	Critical
Last Updated:	Wednesday 07 October, 2015
Source:	ISC AA-01267
Industry Reference:	CVE-2015-4620
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	ISC BIND 9.10.0 to 9.10.2-P1 ISC BIND 9.7.1 to 9.7.7 ISC BIND 9.8.0 to 9.8.8 ISC BIND 9.9.0 to 9.9.7
Vulnerability Description	A denial of service vulnerability exists in ISC BIND. The vulnerability is due to an error during DNSSEC validation. A remote attacker can exploit this vulnerability by sending crafted queries under certain circumstances.

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 ISC BIND DNSSEC Validation 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: ISC BIND DNSSEC Validation Denial of Service