|Check Point Reference:
|20 Sep 2022
|Tuesday 20 September, 2022
|Protection Provided by:
|Who is Vulnerable?
|DNSmasq prior to 2.83
|An out-of-bounds write vulnerability has been discovered in dnsmasq, a DNS and DHCP server. The vulnerability occurs while extracting domain name of a RR record using the extract_name() function while sorting multiple RR records. A remote, unauthenticated attacker can run a server to send a specially crafted DNS reply to a target server.
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.
This protection's log will contain the following information:
Attack Name: DNS Enforcement Violation.
Attack Information: DNSmasq Out-of-Bounds Write (CVE-2020-25682)