GDMA: Fully Automated DMA Rehosting via Iterative Type Overlays
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Presented at USENIX Security 2025 by
Embedded systems are the critical interface between the physical and the digital world, where security breaches can lead to significant harm. In recent years, rehosting has proven to be an effective method for dynamic security testing of embedded systems. However, existing approaches largely ignore the automated rehosting of Direct Memory Access (DMA), a key mechanism for receiving untrusted data. The only fully automated DMA rehosting approach considers just one out of six common DMA mechanisms, leaving significant gaps in the security analysis of firmware.