Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During a red-team engagement you must gain control of Zigbee-based smart bulbs in a corporate lobby. Radio reconnaissance shows the lamps support Touch-Link commissioning, and you have physical proximity. Which attack will most reliably give you the Zigbee network key so you can later send authenticated commands from a laptop located anywhere in the building?

  • Push a crafted over-the-air firmware update that causes the bulb to print the key over its UART debug pins on reboot.

  • Start a rogue Touch-Link commissioning exchange and use the publicly leaked ZLL master key to decrypt the transmitted network key.

  • Passively capture normal Zigbee beacon frames because they include the network key in clear text.

  • Send continuous de-authentication or energy-detection floods so the bulbs fall back to an all-zero 128-bit link key that anyone can use.

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