SEV Ciphertext Side Channel Attacks

Summary AMD has received reports from two research groups detailing methods by which a malicious hypervisor could potentially execute a side channel attack against a running secure encrypted virtualization – secure nested paging SEV-SNP guest. The first report, titled “Relocate + Vote: Exploiting...

FreeBSD : Mbed TLS -- Cache attack against RSA key import in SGX (056ea107-5729-11ea-a2f3-001cc0382b2f)

Janos Follath reports : If Mbed TLS is running in an SGX enclave and the adversary has control of the main operating system, they can launch a side channel attack to recover the RSA private key when it is being imported. The attack only requires access to fine grained measurements to cache usage...