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wdormann's profile
Will Dormann
Will Dormann
Will Dormann
@wdormann

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Will Dormann

@wdormann

Vulnerability Analyst at the CERT/CC. My thoughts are my own, not my employer's.

Joined August 2012

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    1. Alfredo Ortega‏ @ortegaalfredo 4 Oct 2018
      • Report Tweet
      • Report NetzDG Violation

      Alfredo Ortega Retweeted Trammell Hudson  ⚙

      2013: "Alfred, are you mad" "Alfred, those hardware backdoors would never work in real life." "Stop doing stunt-hacking, Alfred" 2018:https://twitter.com/qrs/status/1047788385425940480 …

      Alfredo Ortega added,

      Trammell Hudson  ⚙ @qrs
      Allegedly a supply chain attack on Supermicro's servers installed small CPUs disguised as passive capacitors on the mainboard that were able to take over the BMC, which could then compromise the main CPU: https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how-china-used-a-tiny-chip-to-infiltrate-america-s-top-companies … pic.twitter.com/OR5jSvtAma
      Show this thread
      5 replies 116 retweets 200 likes
      Show this thread
    2. Alfredo Ortega‏ @ortegaalfredo 4 Oct 2018
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      • Report NetzDG Violation

      For reference: https://www.slideshare.net/ortegaalfredo/deep-submicronbackdoorsortegasyscan2014slides … https://ortegaalfredo.github.io/logic-monsters/ 

      2 replies 15 retweets 30 likes
      Show this thread
    3. Alfredo Ortega‏ @ortegaalfredo 4 Oct 2018
      • Report Tweet
      • Report NetzDG Violation

      BTW you don't just replace a capacitor with a CPU and hook it to some bus. You have to design the entire motherboard for it, pass dozen of tests, etc. Something smells fishy here.

      6 replies 17 retweets 72 likes
      Show this thread
    4. Will Dormann‏ @wdormann 4 Oct 2018
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      Replying to @ortegaalfredo

      My read is that it interfaces with the BMC, which seems much more plausible than something interacting with the live main system.

      1 reply 0 retweets 2 likes
    5. Alfredo Ortega‏ @ortegaalfredo 4 Oct 2018
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      Replying to @wdormann

      Yes, it's a small, slow microcontroller but how do you reroute power, and 16+ pcb traces to a tiny chip, and how do you keep it a secret when the design has to be approved by 20+ engineers?

      1 reply 0 retweets 4 likes
      Will Dormann‏ @wdormann 4 Oct 2018
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      Replying to @ortegaalfredo

      I don't believe that the article mentions where in the design / manufacturing process the chip was added. If it's late enough, it wouldn't need too much (or any) approval. I'm quite curious about the interface between the chip and the motherboard, but those details aren't there.

      6:21 AM - 4 Oct 2018
      • 2 Likes
      • Lesley Carhart
      1 reply 0 retweets 2 likes
        1. Lesley Carhart‏ @hacks4pancakes 4 Oct 2018
          • Report Tweet
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          Replying to @wdormann @ortegaalfredo

          Approval is one thing but upsetting the delicate balance of power distribution and spacing?

          0 replies 0 retweets 6 likes
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