Check Point Advisories

DNSmasq Out-of-Bounds Write (CVE-2020-25683)

Vulnerability
Protection

Check Point Reference:	CPAI-2020-3700
Date Published:	6 Feb 2023
Severity:	Medium
Last Updated:	Monday 06 February, 2023
Source:
Industry Reference:	CVE-2020-25683
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	DNSmasq prior to 2.83
Vulnerability Description	An out-of-bounds write vulnerability has been discovered in DNSmasq. Successful exploitation of this vulnerability could result in Out-of-Bounds write.

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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the DNSmasq Out-of-Bounds Write (CVE-2020-25683) 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: DNSmasq Out-of-Bounds Write (CVE-2020-25683)