Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During an internal penetration test you discover that the organization's IoT lighting controller exposes an MQTT broker on TCP port 1883 that allows unauthenticated connections. Following a standard IoT hacking methodology, which step should you perform next to validate that the weakness leads to practical device manipulation?

  • Perform a UDP service scan against port 47808 to look for exposed BACnet objects.

  • Query the broker for its software version to identify potential buffer-overflow exploits.

  • Publish a crafted "ON" command to the lights/room1/set topic and observe whether fixtures respond.

  • Capture and decrypt Zigbee traffic between bulbs and the hub using a software-defined radio.

Certified Ethical Hacker (CEH)
Mobile Platform, IoT, and OT Hacking
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