Dan Guido on Twitter: "This is the truest comment anyone has made about my week so far: https://t.co/jDPKnmQJF0"

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Dan Guido‏ @dguido 13 Mar 2018

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I initially responded to their request out of curiosity -- "Hey, do you want to see our new processor bugs before we release them?" "hell yes I do" -- but after their asks continued to grow billed them our week rate for the work.

7 replies 4 retweets 17 likes

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Dan Guido‏ @dguido 13 Mar 2018

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Dan Guido Retweeted Arrigo Triulzi

I spent all morning talking to reporters, mostly to correct twitter hot takes. Yes, all the flaws require admin privs but all are _flaws_ not expected functionality.https://twitter.com/cynicalsecurity/status/973595697902706688 …

Dan Guido added,

Arrigo Triulzi @cynicalsecurity

Now onto the “vulnerabilities”: 1) MASTERKEY: if you allow unauthorised BIOS updates you are screwed. Threat level: No shit, Sherlock! 2) RYZENFALL: again, loading unauthorised code on the Secure Processor as admin. Threat level: No shit, Sherlock!

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Dan Guido‏ @dguido 13 Mar 2018

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You can find a measured take that includes my commentary on these vulnerabilities from @lorenzoFB @motherboard:https://motherboard.vice.com/en_us/article/kzpm5x/amd-secure-processor-ryzen-epyc-vulnerabilities-and-backdoors …

7 replies 47 retweets 60 likes

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Dan Guido‏ @dguido 14 Mar 2018

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Dan Guido Retweeted Dan Guido

Adding a FAQ based on the last 24 hours: - "Tell me more about how you were paid"https://twitter.com/dguido/status/973687926692466689 …

Dan Guido added,

Dan Guido @dguido

Replying to @IanCutress

It was driven by curiosity first and a favor. However, once we received the technical report and fielded their first set of questions, we realized it went beyond a favor. We anticipated 1 bug, not 13, so we asked to get paid.

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Dan Guido‏ @dguido 14 Mar 2018

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"In a situation like this, would it be common for your firm to discuss disclosure with the vendor?" Yes, and we did. I discussed pros/cons of various options with them and recommended that they report the vulnerabilities to a CERT.

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Dan Guido‏ @dguido 14 Mar 2018

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Dan Guido Retweeted Dan Guido

"Were you made aware of the plans to go public?" No.https://twitter.com/dguido/status/973633990639878144 …

Dan Guido added,

Dan Guido @dguido

Replying to @chronic

I did not see the whitepaper, video, media release, or anything else until a reporter sent it to me. Unlike everyone else, I only had the technical report and none of the media info.

1 reply 1 retweet 1 like

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Dan Guido‏ @dguido 14 Mar 2018

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Dan Guido Retweeted Dan Guido

"How did CTS Labs find you? What is your relationship to them?" Mutual friend. No ongoing relationship.https://twitter.com/dguido/status/973675763319885825 …

Dan Guido added,

Dan Guido @dguido

Replying to @IanCutress

They found us through a mutual friend. I had never spoken to them before, and I have no ongoing relationship with them. They sought us out because they were concerned about the validity of their findings.

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Dan Guido‏ @dguido 14 Mar 2018

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Dan Guido Retweeted Dan Guido

"Do you have any financial position or interest in AMD or Intel stock?" No.https://twitter.com/dguido/status/973986464789868547 …

Dan Guido added,

Dan Guido @dguido

Replying to @audiemmm

No, I do all my investing with an automated portfolio from @Betterment. I have no positions on AMD stock, and I have no arrangement to benefit with a 3rd party. Thanks for asking.

2 replies 1 retweet 4 likes

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Dan Guido‏ @dguido 15 Mar 2018

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Dan Guido Retweeted Trail of Bits

If you're looking for clear, technical information about the flaws then see the blog we just published:https://twitter.com/trailofbits/status/974345028498804737 …

Dan Guido added,

Trail of Bits @trailofbits

We published a technical summary of the "AMD Flaws" so they can be of use to the security community without the distraction of the surrounding disclosure issues. https://blog.trailofbits.com/2018/03/15/amd-flaws-technical-summary/ …

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Dan Guido‏ @dguido 15 Mar 2018

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Dan Guido Retweeted OSTIF Official

This is my favorite take on the AMD Flaws. They are effectively a "jailbreak" for AMD CPUs.https://twitter.com/OSTIFofficial/status/974348788163928064 …

Dan Guido added,

OSTIF Official @OSTIFofficial

Replying to @trailofbits

Wait, back up for a second... Does this mean that MasterKey provides a way to disable the AMD PSP? Is this the way to @coreboot_org and @libreboot that we have been waiting for?

2 replies 18 retweets 32 likes

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Dan Guido‏ @dguido 15 Mar 2018

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Dan Guido Retweeted wildcardNS

This is the truest comment anyone has made about my week so far:https://twitter.com/wildcardNP/status/973921044170989568 …

Dan Guido added,

wildcardNS @wildcardNP

Replying to @dguido

Man did you stumble into the hornet's nest! Better keep that phone on the charger this week lol

11:40 AM - 15 Mar 2018

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3 replies 1 retweet 7 likes

1. Dan Guido‏ @dguido 20 Mar 2018
  
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  AMD published an initial technical assessment of the flaws from CTS and, by all indications, it agrees with our own. They even linked to our blog post! https://community.amd.com/community/amd-corporate/blog/2018/03/20/initial-amd-technical-assessment-of-cts-labs-research …
  
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1. SektorROM‏ @SektorROM 16 Mar 2018
  
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  Replying to @dguido
  
  pic.twitter.com/3RUhszhTiY
  
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