Check Point Advisories

SonicWall SMA Directory Traversal (CVE-2021-20040)

Check Point Reference: CPAI-2021-2131
Date Published: 13 Mar 2024
Severity: High
Last Updated: Wednesday 13 March, 2024
Industry Reference:CVE-2021-20040
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? SonicWall Sma 200 Firmware
SonicWall Sma 200 Firmware
Vulnerability Description A directory traversal vulnerability exists in SonicWall Sma 200 Firmware. Successful exploitation of this vulnerability would allow a remote attacker to list directories on 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

  1. In the IPS tab, click Protections and find the SonicWall SMA Directory Traversal (CVE-2021-20040) protection using the Search tool and Edit the protection's settings.
  2. 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 Directory Traversal (CVE-2021-20040)

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