Linux on Microsoft Azure? Disable this built-in root-access backdoor (wa-linux-agent)

Are you running Linux on Microsoft Azure? Then by default anyone with access to your Azure portal can run commands as root in your VM, reset SSH keys, user passwords and SSH configuration. This article explains what the backdoor (wa-linux-agent) is, what it is meant to do, how it can be disabled and removed and what the implications are. OpenStack/QEMU also have an agent/backdoor which is covered in this article as well.

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