Check Point Advisories

ISC BIND lwresd Query Name Denial of Service (CVE-2016-2775)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0798
Date Published:	15 Sep 2016
Severity:	Medium
Last Updated:	Sunday 09 October, 2016
Source:	ISC AA-01393
Industry Reference:	CVE-2016-2775
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	ISC BIND 9.0.x -> 9.9.9-P1 ISC BIND 9.10.0->9.10.4-P1 ISC BIND 9.11.0a3->9.11.0b1
Vulnerability Description	A denial-of-service vulnerability exists in ISC BIND. The vulnerability is due to failure to check the query length when using lightweight resolver protocol. A remote, unauthenticated attacker could exploit this vulnerability by sending crafted queries potentially leading to denial-of-service conditions.

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 lwresd Query Name 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 lwresd Query Name Denial of Service