Unmaintained filesystems as a threat vector
Unmaintained filesystems as a threat vector
Posted Jul 30, 2023 19:40 UTC (Sun) by Wol (subscriber, #4433)In reply to: Unmaintained filesystems as a threat vector by DemiMarie
Parent article: Unmaintained filesystems as a threat vector
The problem as I understand it there is that DMA expects access to the full address space. And it's running a program that is nothing to do with the kernel.
So it can simply overwrite kernel memory, and there's nothing the kernel can do about it ...
(So you're relying on getting the MMU to contain this potentially hostile peripheral.)
Cheers,
Wol
Posted Jul 31, 2023 3:59 UTC (Mon)
by willy (subscriber, #9762)
[Link]
Unmaintained filesystems as a threat vector
Your understanding is, as usual, incorrect.