Check Point Advisories

SonicWall SMA Buffer Overflow (CVE-2021-20038)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1065
Date Published:	6 Feb 2022
Severity:	Critical
Last Updated:	Tuesday 30 April, 2024
Source:
Industry Reference:	CVE-2021-20038
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	SonicWall SMA200 firmware 10.2.0.8-37sv SonicWall SMA200 firmware 10.2.1.1-19sv SonicWall SMA200 firmware 10.2.1.2-24sv SonicWall SMA210 firmware 10.2.0.8-37sv SonicWall SMA210 firmware 10.2.1.1-19sv SonicWall SMA210 firmware 10.2.1.2-24sv SonicWall SMA400 firmware 10.2.0.8-37sv SonicWall SMA400 firmware 10.2.1.1-19sv SonicWall SMA400 firmware 10.2.1.2-24sv SonicWall SMA410 firmware 10.2.0.8-37sv SonicWall SMA410 firmware 10.2.1.1-19sv SonicWall SMA410 firmware 10.2.1.2-24sv SonicWall SMA500v firmware 10.2.0.8-37sv SonicWall SMA500v firmware 10.2.1.1-19sv SonicWall SMA500v firmware 10.2.1.2-24sv
Vulnerability Description	A buffer overflow vulnerability exists in SonicWall SMA. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system or cause application crashes.

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 SMA 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 SMA Buffer Overflow (CVE-2021-20038)