A software-only exploit extracts the root VCEK seed on EPYC Milan by first gaining code execution on the secure processor and then bypassing fuse write restrictions.
{CIPHERLEAKS}: Breaking constant-time cryptography on {AMD}{SEV} via the ciphertext side channel
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Insecure Despite Proven Updated: Extracting the Root VCEK Seed on EPYC Milan via a Software-Only Attack
A software-only exploit extracts the root VCEK seed on EPYC Milan by first gaining code execution on the secure processor and then bypassing fuse write restrictions.