Comments (4)
The IOMMU is a memory management unit for devices, which basically allows for the operating system to assign "device page tables" to individual devices.
Many operating systems do not use the IOMMU to protect against DMA attacks at all.
Some systems, such as Windows 10 with Virtualization Based Security will only protect their "secure kernel" fully, while leaving ordinary kernel/user-space read-only or totally unprotected. (that is what I mean with does not work fully).
Some systems, such as macOS protects almost everything by default.
from pcileech.
Thank you for the explanation. I wonder if there is any other way to get around this protection?
(Although it may be off-topic for this project) Is it possible to directly "hijack" the DRAM, for example to plug into the pins of its socket and record IO operations to get a full copy of physical memory?
from pcileech.
About the RAM attack you mention, it's been done, but it's cutting edge research.
from pcileech.
Thanks for the information! It seems not really practical yet.
from pcileech.
Related Issues (20)
- DEVICE: FPGA: ERROR: Unable to retrieve required Device PCIe ID [4,v4.10,0000] HOT 1
- Hi, I'm having some problems initializing the device HOT 11
- Mouse&Keyboard status HOT 1
- read memory size and data problem HOT 3
- After time a module fetched will become unavailable HOT 2
- How to find information about a shared memory section HOT 2
- Using pcileech to move mouse HOT 1
- pci squirrel (Failed to connect to the device.) HOT 4
- DMA freezes every few seconds HOT 4
- Unable to retrieve required Device PCIe ID [4,v4.7,0000,FWCUST] HOT 2
- AMD + Screamer PCIe Squirrel: Probe reads 10% then fails subsequently HOT 1
- ERROR: PCILeech Invalid LeechDMA version number HOT 10
- PCILEECH: Failed to connect to the device. HOT 3
- M.2 Screamer Issue HOT 1
- May I ask if the shell code (WINX64_STAGE23_VMM3) of kmd has an active code? HOT 3
- Can the project be compiled to Linux to use to attack Windows HOT 1
- Specify PageDirectoryBase (DTB/CR3) in -dtb option if value if known. HOT 1
- Can't read anything HOT 1
- LeechAgent.exe not included in release HOT 1
- Connection to the board is lost after 1 use HOT 1
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from pcileech.