Despite being alerted to these issues, the company has made no attempt to fix things.
If you have a Nexx brand WiFi garage door opener, now would be a good time to uninstall it.has discovered a number of vulnerabilities that allow hackers anywhere in the world to remotely open any Nexx-equipped garage door, and detailed it in a blog post on Medium. Worst of all, the company has made no attempt to fix things., security researcher Sam Sabetan discovered the critical vulnerabilities in Nexx’s smart device product line while conducting independent security research.
When someone uses the Nexx app to open their garage door, the app doesn’t directly communicate with the door opener. Instead, it posts a message to Nexx’s MQTT server. The garage door opener is subscribed to the server and when it sees the relevant message, it opens the door. This enables reliable performance and means your smartphone doesn’t have to be on the same network as your garage door opener, but it’s crucial that every device using the service has a secure, unique password.
Worse, Sabetan was able to replay the message posted to the server by his device to open his garage door. Although he didn’t, he could have used the same technique to open the garage door of any Nexx user in the world.
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