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Certified Ethical Hacker (CEH) Practice Question

During an engagement against a smart lighting system, you successfully downloaded a firmware update file for the bulbs from the vendor's public URL. According to standard IoT hacking methodology, what is the most appropriate next step to identify hard-coded SSH private keys or passwords inside the image?

  • Send fuzzed MQTT publish messages to the controller in hopes of triggering a buffer overflow.

  • Run an aggressive TCP SYN scan with Nmap to discover any additional open ports on the bulbs.

  • Launch an 802.11 deauthentication attack to capture WPA/WPA2 handshakes from the lighting network.

  • Use binwalk to extract and inspect the firmware's file system for embedded credentials.

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