Check Point Advisories

ISC BIND RRSIG Query Denial of Service (CVE-2011-1907)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-401
Date Published:	20 Sep 2012
Severity:	Critical
Last Updated:	Saturday 20 April, 2024
Source:	CVE-2011-1907
Protection Provided by:	Security Gateway R75
Who is Vulnerable?	ISC BIND 9.8.0
Vulnerability Description	A denial of service vulnerability has been reported in ISC BIND.
Vulnerability Details	The vulnerability is caused due to an assertion error failure while processing RRSIG queries. A remote attacker can exploit this issue by sending RRSIG requests to the target server. Successful exploitation would cause the server to become unresponsive, resulting in a denial of service condition.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

In the IPS tab, click Protections and find the ISC BIND RRSIG Query Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: DNS Enforcement Violation
Attack Information: ISC BIND RRSIG Query Denial of Service