Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug

Ledger's Donjon security team has published a detailed analysis of the Raspberry Pi RP2350 microcontroller, demonstrating a sophisticated hardware attack method. By utilizing photon-emission-guided laser fault injection (LFI), researchers were able to bypass the device's secure debug protections. The study highlights how precise laser pulses can disrupt the chip's internal operations, specifically targeting the security mechanisms intended to prevent unauthorized access to debug interfaces. This research provides critical insights into the physical security vulnerabilities of modern microcontrollers. By mapping photon emissions, the team identified the exact timing and location required to induce faults that effectively disable security locks. This finding serves as a significant case study for hardware engineers and security researchers focusing on side-channel attacks and physical tamper resistance in embedded systems, emphasizing the ongoing challenge of securing hardware against advanced laboratory-grade exploitation techniques.