Maxim Kammerer: > On Sat, Oct 13, 2012 at 1:30 AM, Jacob Appelbaum > <[email protected]> wrote: >> I would add Thunderbolt to the list as well: >> http://www.breaknenter.org/2012/02/adventures-with-daisy-in-thunderbolt-dma-land-hacking-macs-through-the-thunderbolt-interface/ > >> > As far as I can see, all these attacks (PCMCIA, ExpressCard, > Thunderbolt) rely on attaching to a FireWire interface one way or > another, and then accessing arbitrary memory via DMA. But such > ability is (or can be) disabled by default in the newer firewire-ohci > module, as described in "debugging-via-ohci1394.txt", and even > discussed on the relevant Tails TODO page. So why disable the > interfaces? Looks like an overkill to me. >
My understanding is that this assumption doesn't actually pan out in practice. I've cc'ed Steve who may have some more information to contribute. As I understand things, he found that as predicted, the default "it is off" doesn't actually always turn DMA off. All the best, Jacob _______________________________________________ tails-dev mailing list [email protected] https://mailman.boum.org/listinfo/tails-dev
