In RIOT 2019.07, the MQTT-SN implementation (asymcute) mishandles errors occurring during a read operation on a UDP socket. The receive loop ends. This allows an attacker (via a large packet) to prevent a RIOT MQTT-SN client from working until the device is restarted.
| Software | From | Fixed in |
|---|---|---|
| riot-os / riot | 2019.07 | 2019.07.x |