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Bare metal flaw allows hackers to put backdoors into cloud servers

February 27, 2019 / Rene Millman

A new flaw has been discovered by security researchers that could enable hackers to install backdoors on the firmware of bare-metal cloud servers that stay active even when the customer using the hardware has been re-assigned elsewhere.Called “Cloudbourne”, the vulnerability was first discovered by researchers at the Eclypsium Research Team, who detailed their findings in a blog post. They found that hackers could plant backdoors and malware in the firmware of a server, or in its baseboard management controller (BMC), with relative ease.These BMCs enable remote management of a server for initial provisioning, operating system reinstall and troubleshooting. Cloudborne exploits a flaw in the hardware’s reclamation process when moving clients on and off a bare metal server.