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Mount /boot non-world-writable

rcombs
in Security

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Currently, the boot flash drive is mounted world-writable during startup. This creates potential privilege escalation vulnerabilities, since a process running as an individual user could add lines to /boot/config/go, or overwrite the kernel image or initramfs. Could /boot be mounted with perms set to 0755 instead?

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    • 3 weeks later...
    • Author

    There are no individual users in unRAID.

    Sorry? I'm confused. A number of plugins create a user for their services to run under, or run as `nobody`, either by using sudo or su in their startup scripts, or by calling setuid/setgid once started. A compromise to one of those services shouldn't allow an attacker to overwrite the entire boot drive.

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