These vulnerabilities are caused by the improper design or implementation of authentication mechanisms and input validation. Exploiting these vulnerabilities could enable an attacker to bypass authentication, which could lead to the unauthorized disclosure or tampering of authenticated information, unauthorized access to sensitive data, and remote access without proper authorization.

The identified vulnerability types and potential impacts are shown below:

Affected Products:

The affected products and firmware versions are shown below.

Solutions:

Moxa has developed appropriate solutions to address the vulnerabilities. The solutions for affected products are shown below.

Mitigation

• Minimize network exposure to ensure the device is not accessible from the Internet.
• When remote access is required, use secure methods, such as Virtual Private Networks (VPNs).
• The starting point of all the above vulnerabilities is from the web service, so it is suggested to disable web service temporarily if you completed configuration to prevent further damages from these vulnerabilities until installed patch or updated firmware. 

Products Confirmed Not Vulnerable:

Only products listed in the Affected Products section of this advisory are known to be affected by these vulnerabilities. 

Acknowledgment:

We would like to express our appreciation to Noam Moshe of Claroty Research - Team82 for reporting the vulnerabilities (CVE-2023-39979, CVE-2023-39980, and CVE-2023-39981), Darren Martyn for advising on a vulnerability (CVE-2023-39982), and James Sebree from the Tenable Bug Bounty Program for his contribution in reporting a vulnerability (CVE-2023-39983) and working with us to help enhance the security of our products and provide a better service to our customers.

Revision History: