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Chip.Fail - Glitching the Silicon of the Connected World

Black Hat via YouTube

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Overview

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This presentation demonstrates voltage fault-injection attacks against IoT processors, using inexpensive equipment, FPGA-based glitchers, and host-control software. It applies the methodology to devices including the nRF52840, ESP32, and STM32F2, and discusses defensive testing and design practices.

Syllabus

Intro
Takeaways
Why is this getting important?
Voltage glitching: Flash reads
Voltage glitching: RAM reads
Three steps to success
Power domains
Removing capacitors: Problem...
The chip.fail glitcher
Digilent Cmod A7
MAX PMOD
Hooking it up
The glitcher
FPGA Bitstream
Host control: Jupyter Notebook
Host control: Example glitcher
nRF52840: Test firmware
Glitching results
ESP32: Glitching
The 5$ Glitcher...
Previous work
STM32 Read-out Protection (RDP)
Dumping the bootrom
Let's apply our methodology
Bootrom Glitching
STM32F2 Boot process (1.4ms)
Power consumption after reset (200)
Parameters
Dumping the money!
The STM32F2 Glitcher
Options for defense
Conclusion

Taught by

Black Hat

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