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Researchers Hacked into Apple’s New USB-C Controller
The investigation started by analyzing the ACE2 to understand its architecture and vulnerabilities. Using hardware exploits on MacBooks and custom macOS kernel modules; they managed to backdoor the ACE2 persistently. However, the ACE3 posed a more formidable challenge due to its robust security enhancements.
It runs a complete USB stack and connects to internal device buses, such as the JTAG application processor and SPMI bus. Using electromagnetic fault injection at this critical juncture, they successfully bypassed the validation checks and booted a modified firmware patch into the chip’s CPU. While this hack underscores potential vulnerabilities in Apple’s hardware design, it also opens avenues for further research into securing custom chips like the ACE3.
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