This capability is the reason behind the exceptional performance of PCI devices, but it also makes them susceptible to drive-by DMA attacks.ĭrive-by DMA attacks are attacks that occur while the owner of the system isn't present and usually take just a few minutes, with simple-to-moderate attacking tools (affordable, off-the-shelf hardware and software), that don't require the disassembly of the device. These devices are DMA-capable, and can access system memory and perform read and write operations without the need for the system processor's involvement. PCIe hot plug devices such as Thunderbolt, USB4, and CFexpress allow users to attach classes of external peripherals, including graphics cards, to their devices with the plug-and-play ease of USB. Kernel DMA Protection is a Windows security feature that protects against external peripherals from gaining unauthorized access to memory.
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