this post was submitted on 22 Jun 2024
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By definition, you can't. Any software level solution will fail since you can just move the drive somewhere else. It must be baked into the hardware and firmware.
Edit to add further clarification. Do you need it to be failing on every device or just on a device that you control? Since as stated before, moving a mass storage will completely overthrow any software solution
Actually, I'm fine with a solution that only works on a device that I control. But, failing on every device is nice as well.
Right, working on every device requires a hardware solution. I haven't encountered any such hardware yet but I do know that it is possible. Next, your second requirement makes what you're trying to accomplish impossible. Privilege escalation by definition will escalate the privilege. The problem lies in the fact that the root user is basically a god in linux. You can even wipe your system if you so desire. However, you can read more into SELinux or other similar systems. It works by basically running check on the kernel level not user level. But the only solutions I can think of will make other day-to-day tasks more of a hassle. Also, note that whoever knows how to modify the SELinux can also bypass the system. I found an answer on serverfault that points to a blog. However, I haven't read the blog yet. You may find an answer there.
Thank you!
You're welcome. I also recommends Arch Wiki on SELinux. It helps clarify a lot of things and how different it is with traditional linux privilege escalation.
Will do.