From gbhackers.com
Researchers found new remote attack against Server firmware (BMC) that renders server unbootable by exploiting the vulnerabilities and gain the systems remote access.
This Attack Starts by pushing an update to the firmware and pass the malicious firmware image into Baseboard Management Controller (BMC) which causes servers completely unbootable and failed to recover.
A baseboard management controller (BMC) is a specialized service processor that monitors the physical state of a computer, network server or other hardware device using sensors.