Check Point Advisories

SonicWall Email Security Directory Traversal (CVE-2021-20023)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0950
Date Published:	16 Jan 2022
Severity:	Medium
Last Updated:	Sunday 16 January, 2022
Source:
Industry Reference:	CVE-2021-20023
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	SonicWall Email Security version 10.0.9.x
Vulnerability Description	A directory traversal vulnerability exists in SonicWall Email Security. Successful exploitation of this vulnerability could allow an attacker to access arbitrary files 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

In the IPS tab, click Protections and find the SonicWall Email Security Directory Traversal (CVE-2021-20023) 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 Email Security Directory Traversal (CVE-2021-20023)