Ok, so these "AMD flaws" are nowhere near anything like Meltdown or Spectre.

According to their "whitepaper", it lets you pwn your PSP and chipset if you already have root access on the main CPU. In the worst case, it's like the Intel ME BUP bug from december.
It's useful for researchers, coreboot porting, breaking DRM, etc. But it's no use for a remote (or even unprivileged local) attacker.

Their website makes it look way more dangerous than it is.

Then there's a lot of fishy stuff, like
- too much effort went into the website's design
- the website has lots of infographics and not-very-specific text, repeating the same things over and over again
- the whitepaper doesn't look like a whitepaper, and seems to be written with non-technical people in mind, especially the first few pages
- they have a huge legal disclaimer that says they may have financial interest in the value of AMD shares
- cts-labs.com exists for less than 1 year

@Wolf480pl also they only gave AMD 24 hours notice. 'responsible' disclosure my ass.

@samis @Wolf480pl I don't know what website you two are talking about, but picking on researchers for disclosing PSP flaws is, IMO, ridiculous.

PSP itself is a flaw. A malignant tumor that shouldn't exist.

Shame on you two for defending it.

@taoeffect @samis
I'm not defending PSP, but it's problematic only as long as we can't control it.

And I'm not picking on researchers for disclosing the flaws. I'm picking on them for making it look like a CPU flaw, like-Meltdown-except-worse. And telling people that their network is in danger because of it.

Also, the researchers didn't disclose any technical details, ust a bunch of noise.
It just looks like a hoax or an attempt to harm AMD by spreading FUD.

amdflaws.com/

@Wolf480pl @samis PSP is like-Meltdown-except-worse. I see nothing wrong with that description of it.

@taoeffect @samis No it isn't. You can't exploit a flaw in PSP from an unprivileged process. Or from JS running in the browser. You have to be root to exploit PSP. At which point, why bother doing that, you got root anyway.

@Wolf480pl @samis Meltdown doesn't give you total control over a computer. PSP does (my understanding), and it does so with no defense or mitigation possible.

A purposefully-built unstoppable backdoor is worse than an accidental design-flaw.

@taoeffect @samis But you have to already have total control over a computer in order to use PSP to gain total control over the computer.

@Wolf480pl @samis Eh, I doubt that. Is there proof that there's no master key?

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@taoeffect @samis there's not.
But that's not what the researchers found.
Can we agree that the flaws in PSP that the researchers found are not dangerous to a reasonably security-conscious user?
Then we can discuss the PSP itself if you like.

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