I decided that my forum activity should be bit more than trying to fight all the spam we've been getting recently so here it is.
Researcher Christopher Domas found hardware backdoor (as far as I understand unintentional one) in one of bit more obscure x86 CPUs, allowing privilege escalation.
Whitepapers/slides: https://www.blackhat.com/us-18/briefings/schedule/#god-mode-unlocked---hardware-backdoors-in-x86-cpus-10194
Video: https://www.youtube.com/watch?v=_eSAF_qT_FY
He also had interesting talk last year concerning finding undocumented x86 instructions:
https://www.youtube.com/watch?v=ajccZ7LdvoQ
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Hardware Backdoors in x86 CPUs
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Hardware Backdoors in x86 CPUs
by NETWORKsecurity on Thu Aug 30, 2018 5:46 pm
([msg=96192]see Hardware Backdoors in x86 CPUs[/msg])
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Re: Hardware Backdoors in x86 CPUs
by oasis on Fri Aug 31, 2018 9:57 am
([msg=96193]see Re: Hardware Backdoors in x86 CPUs[/msg])
Great video. He tel us exactly what he is doing and what he did in each step. Far too advanced for me but still good tosee how its done.
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Re: Hardware Backdoors in x86 CPUs
by Byrann on Tue Feb 05, 2019 3:29 am
([msg=97362]see Re: Hardware Backdoors in x86 CPUs[/msg])
Thanks for the topic.
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