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DDR4 WireTap and Battering RAM: Server TEE Attacks Explained

🔒 Two independent research teams demonstrated practical physical attacks that extract encrypted data from server trusted execution environments by intercepting DDR4 memory traffic. The U.S. WireTap proof-of-concept slowed memory clocks and used an inexpensive legacy logic analyzer to recover keys from Intel SGX. The Battering RAM team employed a tiny interposer and a Raspberry Pi Pico to mirror writes and target both Intel SGX and AMD SEV-SNP covertly. Both efforts drastically lower cost and complexity compared with prior work, though vendors note that physical attacks sit outside their threat model.