Sommaire

  • Cet exposé a été présenté le 05 avril 2019.

Description

  • Orateur

    Ludovic Claudepierre

Electromagnetic injection (EMI) is a common and non-invasive technique used to perform fault attacks. In that case, an electromagnetic wave is radiated by an antenna in the close vicinity of the targeted microcontroller (STM32 in our case).
The clock signal is generated thanks to a Phase-Locked-Loop (PLL). The PLL is highly sensitive to EMI and then induces severe disruption on the clock signal just after the injection. It appears that these clock glitches are the cause of faults observed at the software level.
TRAITOR is a light and highly configurable platform which can reproduce, using FPGA, a clock signal with the same disruptions than obtained by EMI. The signal generated replaces the clock source of the STM32.
User can then perform several glitches at different time in order to fault a program at run-time and induce vulnerabilities. It can especially be applied to code with counter-measure to only one injection fault and then bypass this counter-measure. At the end, multiple fault injection could completely transform an innocent piece of code and make it malicious.

Infos pratiques

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