Check Point Advisories

Zyxel USG Authentication Bypass (CVE-2020-29583)

Vulnerability
Protection

Check Point Reference:	CPAI-2020-3436
Date Published:	29 Jan 2023
Severity:	Critical
Last Updated:	Sunday 29 January, 2023
Source:
Industry Reference:	CVE-2020-29583
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Zyxel USG Firmware version 4.60
Vulnerability Description	An authentication bypass vulnerability exists in Zyxel USG. Successful exploitation of this vulnerability would allow remote attackers to gain unauthorized access 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 Zyxel USG Authentication Bypass (CVE-2020-29583) 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: SSH Protection Violation.
Attack Information: Zyxel USG Authentication Bypass (CVE-2020-29583)