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by nyanpasu64 1405 days ago
I've heard stories of Thinkpads with UEFI-level rootkits, flashed a modified UEFI myself (though my edits didn't achieve what I set out to do), and read about white-hat exploits putting keyloggers on the EC (power/keyboard controller): https://hackaday.com/2021/07/20/extracting-the-wifi-firmware.... I wouldn't fully trust used computers, to the extent I'd trust a Precursor, single-tasking microcontroller, or pre-2000 game console.