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I think the main lesson from @xoreaxeaxeax's Via "backdoor" research is... read the datasheet before you write a fuzzer. Turns out it was documented all along. http://datasheets.chipdb.org/VIA/Eden-ESP/Eden%20v1.4.pdf … pages 70-71.
The other lessons are "motherboard BIOS writers are incompetent" (but we knew that already) and "you can easily blackbox reverse engineer an instruction set" (but I already did that a couple years ago: https://github.com/fail0verflow/radeon-tools/tree/master/f32 …)
So yeah. Google is a reverse engineer's best friend, and good Google-fu is more valuable than good IDA-fu. See: how we found bonaire.rai (also in the PS4 talk).
Well, there you have it 
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