6 comments

  • BitBangingBytes 7 minutes ago
    I appreciate all the details they provide in the post. The $250k in lab gear is useful when initially discovering, exploiting and documenting attacks like this.

    Definitely doable in a home lab for under $25k in equipment, likely under $10k.

    Same as my replicating Colin O’Flynn’s BAM BAM attack on a MPC5566 chip, he used a ChipShouter ($5,000) and I used a PicoEMP ($50).

    https://youtu.be/URmI1VVilek

  • jacquesm 1 hour ago
    That's reminiscent of when we first found out that if you opened up dram chips you could use them for imaging. Of course the scale at which this is done is extremely impressive.
  • stackghost 1 hour ago
    > The attack requires physical access, destructive preparation, and approximately $250,000 of laboratory equipment.

    Not super practical, but neat attack

    • mrlambchop 1 hour ago
      250k is not a bad investment for a company doing "reverse engineering as a service" - say 1k a pop to extract the firmware. Naturally, a good business idea for somewhere in the world with less regulations...
    • stickfigure 49 minutes ago
      That is peanuts for a nation-state actor.
      • stackghost 32 minutes ago
        Sure, but if you’re defending against a nation state actor hopefully you aren’t expecting a raspberry pi to keep you secure.
        • palmotea 12 minutes ago
          > Sure, but if you’re defending against a nation state actor hopefully you aren’t expecting a raspberry pi to keep you secure.

          Is there anything about these techniques that are raspberry pi specific? It seems like they're using lasers to identify and flip particular bits in registers.

          • bob1029 4 minutes ago
            There are HSMs that are effectively immune to this attack by way of their construction and packaging. You need an optical path to the secure device. The only way to get at this is to tamper with the tamperproof part of the system.

            Some very high end HSMs must be actively powered at all times which makes disturbances in their local environments detectable at all times as well. Getting lucky and drilling through a part of the enclosure that isn't directly protected won't help you if a barometric pressure sensor is tripped as a consequence of breaking the hermetic seal.

        • ssl-3 20 minutes ago
          The RP2350 is an inexpensive microcontroller IC with reasonable performance and some very useful (and somewhat unusual) features in its PIO blocks.

          Why wouldn't a person build that into the heart of something important?

          • sephamorr 16 minutes ago
            "Important" and "tamper proof against a determined adversary" are very different goals.
    • _trampeltier 1 hour ago
      Some people have such and other toys just at work and can use it in spare time.
    • paulnpace 1 hour ago
      > $250,000 of laboratory equipment

      *currently

      • stavros 43 minutes ago
        $300,000 next year.
        • TeMPOraL 22 minutes ago
          In 5 years, either $400,000 or $50 and a hammer, depending on whether the core piece of the process aligns with the needs of some fast-growing consumer tech product like e.g. drones.
          • dist-epoch 2 minutes ago
            I think GP was making a joke about RAM prices. Makes me wonder what is the effect of the RAMpocalypse on drone prices.
        • k12sosse 22 minutes ago
          We're already up to 400,000 just today.
    • TZubiri 44 minutes ago
      It reads as impressive defense. Meaning that it's presumably not possible to get root with physical access on a live 50$ device without 250k capital
      • Rohansi 11 minutes ago
        This is for a $1 microcontroller. I'm assuming you're talking about the Raspberry Pi computers based on the $50 cost and root.
  • Fred27 1 hour ago
    There's always an XKCD... https://xkcd.com/538/
    • orbital-decay 1 hour ago
      It needs to be updated. Modern evil planners don't even need a wrench since they already have most keys given to them in advance by everyone, including nerds
      • junon 36 minutes ago
        Care to expand?
  • brcmthrowaway 44 minutes ago
    Now it can be done for Apple iPhone. Apple is cooked.