4 ms·
I discovered a very similar vulnerability in Mysa smart thermostats a year ago, also involving MQTT, and also allowing me to view and control anyone's thermosta
by dlenski 8mo ago
I discovered a very similar vulnerability in Mysa smart thermostats a year ago, also involving MQTT, and also allowing me to view and control anyone's thermostat anywhere in the world:
https://news.ycombinator.com/item?id=43392991 https://news.ycombinator.com/item?id=43392991
Also discovered during reverse-engineering of the devices’ communications protocols.
IoT device security is an utterly shambolic mess.
- minimalthinker 8mo agoI’m not super familiar with MQTT. I wonder how common this is..
- dlenski 8mo agoMQTT is a very simple pub/sub messaging protocol. It's used in a enormous number of IoT devices. The "IoT gateway" service from AWS supports MQTT and a whole lot of IoT devices are tethered to this service specifically.
- stevage 8mo agoThat is terrifying. Messing with thermostats could be enough to kill vulnerable people.
- dlenski 8mo agoYes. An excerpt from my initial email to Mysa's security contact… > I stumbled upon these vulnerabilities on one of the coldest days of this winter in Vancouver. An attacker using them could have disabled all Mysa-connected heaters in the America/Vancouver timezone in the middle of the night. That would include the heat in the room where my 7-month-old son sleeps.