A stack-based buffer overflow in the built-in web server in Moxa NPort W2150A/W2250A Series firmware version 2.3 and prior allows a remote attacker to exploit the vulnerability by sending crafted payload to the web service. Successful exploitation of the vulnerability could result in denial of service.

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 web services, so it is suggested to disable web services temporarily if you have completed configuration them to prevent further damage from these vulnerabilities until a patch or firmware update is installed. 

Products That Are Not Vulnerable:

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

Acknowledgment:

We would like to express our appreciation to Vladimir Razov from Positive Technologies for reporting this vulnerability, working with us to help enhance the security of our products, and helping us provide a better service to our customers.

Revision History: