Hackers remotely turn up the voltage on motherboards to brick servers
, adding that it was"less messy" as there were fewer cables and no need to control temperature.
"With this attack we only need the Ethernet cable to connect to the server. And that's it. We don't need to open the box anymore." The duo's big takeaway is that trusted execution environments"like SGX must not only rely on the security of the CPU itself, but also of that of management components [in] the hardware design of the platform."
Overall, they advocate thinking of a server as an embedded system, declare that SGX attestation cannot measure BMC firmware, and warn that improper jumper configuration can cause security issues.for identifying if a voltage regulator modeule is connected to the PMBus. However, they've only yet tested it on Reneseas ISL68137 and Monolithic MP2955.to Chen and Oswald's disclosure back in January.
That includes those that incorporate the Intelligent Platform Management Interface – the X11, X12, H11, and H12 product lines. ®
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