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Comment #32226682
Would you mind explaining more about your job?
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Comment #23155148
No, Bootcamp enabled operating systems do not have the same protections as MacOS on the very same hardware. Apple says to use MacOS if you want (IOMMU+kDMA) security protections.
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Comment #23154784
ssh uses asymmetric keys and the cache on the client has a three tuple (host,ip,public key) which allows a client to notice a difference in any of the three elements. By comparison…
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Comment #23146910
Yes. With MacOS and Thunderbolt 3 devices on Apple hardware the IOMMU is used as expected. This should handle DMA attacks when booted into MacOS. An important caveat: the IOMMU alo…
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Comment #23146889
After the device is connected, use looks like a key consistency aware system like an ssh client. It is as you note very different in the first protocol run. To extract the device s…
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Comment #23144590
Have you documented or published any of your Thunderbolt reverse engineering efforts?
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Comment #23144486
Many smaller devices do not require tools and are trivial to clone. Any of the victim devices will do. It's not only useful to attack a target computer. Device identifiers and capa…
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Comment #23144352
That isn't entirely accurate. The ability to clone a given device state gives access to any system which has authorized that cloned device. A borrowed thunderbolt device which is n…
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Comment #23144337
It is not like ssh at all. It is a problem that secrets are kept in the flash and it is also a problem that those secrets are sent over the untrusted channel.
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Comment #23144328
This only holds for Macbooks running MacOS. It will not be protected by the IOMMU if the system uses Bootcamp with Windows or another operating system such as Linux.