Check Point Advisories

Zyxel NBG2105 Authentication Bypass (CVE-2021-3297)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-2211
Date Published:	26 Sep 2024
Severity:	High
Last Updated:	Thursday 26 September, 2024
Source:
Industry Reference:	CVE-2021-3297
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Zyxel NBG2105 firmware V1.00(AAGU.2)C0
Vulnerability Description	An authentication bypass vulnerability exists in Zyxel NBG2105 firmware. 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 NBG2105 Authentication Bypass (CVE-2021-3297) 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: Application Servers Protection Violation.
Attack Information: Zyxel NBG2105 Authentication Bypass (CVE-2021-3297)