Check Point Advisories

CHiyu Devices Authentication Bypass (CVE-2021-31251)

Check Point Reference: CPAI-2021-1750
Date Published: 24 May 2023
Severity: Critical
Last Updated: Wednesday 24 May, 2023
Industry Reference:CVE-2021-31251
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? CHiyu Converter BF-430
CHiyu Converter BF-431
CHiyu Converter BF-450M
Vulnerability Description An authentication bypass vulnerability exists in CHiyu devices. Successful exploitation of this vulnerability could allow a remote attacker to gain unauthorized access to 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 CHiyu Devices Authentication Bypass (CVE-2021-31251) 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:  Application Servers Protection Violation.
Attack Information:  CHiyu Devices Authentication Bypass (CVE-2021-31251)

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