From small business to large enterprise, VOIP phones can be found on nearly every desk. But how secure are they? What if your phone was spying on every conversation you have?

This talk is an introduction to hardware hacking and as a case study I’ll use the [REDACTED] Deskphone, a device frequently deployed in corporate environments. I’ll use it to introduce the tools and methodology needed to answer these questions.

During this talk, attendees will get a close up look at the operations of a hardware hacker, including ARM disassembly, firmware extraction using binwalk, microsoldering to patch an EEPROM and get a root shell over UART, and ultimately uncover an already known decadeold bug that somehow remained unnoticed in the device’s firmware.

Beyond the case study I will also address alternative tactics; some did not work, others may have but were not the lowesthanging fruit. When it comes to hardware hacking, the process is as important as the result; knowing that there are multiple ways to reach the end goal helps researchers remain confident when hurdles arise. After the talk, attendees will have an increased distrust towards alwayson devices; however, they will have the background knowledge to investigate the products and systems they encounter daily.

Philippe Laulheret
Philippe Laulheret is a Senior Security Researcher on the McAfee Advanced Threat Research team. With a focus on Reverse Engineering and Vulnerability Research, Philippe uses his background in Embedded Security and Software Engineering to poke at complex system and get them to behave in interesting ways. He previously talked about Reverse Engineering PSX game at Bsides PDX, created & contributed to some Hardware Hacking CTF when working at Red Balloon Security and shared the love of tearing apart VOIP phones during adhoc workshops at multiple conferences (Summer Con, Hardware Hacking Village, etc.)

Twitter: @phLaul