Pulse of Truth

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krogoth@infosec.pub

‘Sinkclose’ Flaw in Hundreds of Millions of AMD Chips Allows Deep, Virtually Unfixable Infections (www.wired.com)

submitted 3 months ago by lemmydev2@infosec.pub to c/pulse_of_truth@infosec.pub

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Researchers warn that a bug in AMD’s chips would allow attackers to root into some of the most privileged portions of a computer—and that it has persisted in the company’s processors for decades.

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[–] mrvictory1@lemmy.world 9 points 3 months ago (2 children)

tldr: this exploit allows someone with kernel level access to reach system management mode.

[–] 7355608@lemmy.world 4 points 3 months ago (1 children)

I wouldn't call myself a computer science expert, but if you have kernel level access can't you already reach system management mode? Or am I way off the mark here?

[–] mrvictory1@lemmy.world 0 points 3 months ago

User level: Ring 3. Kernel level: Ring 0. This is the highest level an OS is supposed to access. SMM: Ring -2. Here is a post about accessing SMM if you are interested (scroll down to HP daystarter) https://cohost.org/cathoderaydude/post/1311259-hell-never-ends-on-x