#ETHZurich

Confidential VMs Hacked via New Ahoi Attacks

by

April 8, 2024 at 09:54AM Researchers from ETH Zurich have unveiled new attack techniques called Ahoi attacks, targeting hardware-based trusted execution environments in cloud platforms using AMD’s SEV-SNP and Intel’s TDX technologies. The attacks allow malicious hypervisors to compromise confidential virtual machines and gain root access. The researchers have notified relevant companies, and relevant patches … Read more

ZenHammer Attack Targets DRAM on Systems With AMD CPUs

by

March 26, 2024 at 11:00AM Researchers at ETH Zürich have demonstrated that Rowhammer attacks can be conducted against DDR4 and DDR5 memory on AMD Zen 2 and Zen 3 systems, despite mitigation efforts. They have named this variant ZenHammer and disclosed their findings to AMD, which has published a security bulletin and provided mitigation recommendations. … Read more