Check Point Advisories

SonicWall SMA100 Buffer Overflow (CVE-2021-20038)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1065
Date Published:	6 Feb 2022
Severity:	Critical
Last Updated:	Sunday 06 February, 2022
Source:
Industry Reference:	CVE-2021-20038
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	SonicWall SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and prior.
Vulnerability Description	A buffer overflow vulnerability exists in SonicWall SMA100. Successful exploitation of this vulnerability could result in a denial of service or execution of arbitrary code into the affected system.

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 SonicWall SMA100 Buffer Overflow (CVE-2021-20038) 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: Web Server Enforcement Violation.
Attack Information: SonicWall SMA100 Buffer Overflow (CVE-2021-20038)