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Channel: Uwe Hermann - Physical memory attacks via Firewire/DMA - Part 1: Overview and Mitigation (Update) - Comments
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OpenFirmware

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Interesting, I'll try to validate/reproduce this. Note however, that newer Macs are partially EFI-based (AFAIK) so this may not apply there...

Update: Oh, and this will only work for Mac OS X of course (as it's a feature in the Mac OS X kernel). If you're running Linux on Apple hardware for example (macbook, macmini, etc) then setting an OpenFirmware password will definately not help! So be careful and always test if you're affected.


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