Comment on Silverblue or other immutable on remote VPS?

• asap@lemmy.world ⁨2⁩ ⁨months⁩ ago

  They 100% can.

  It’s a read-only filesystem:

  /dev/nvme0n1p4 on /sysroot type xfs (ro)
  /dev/nvme0n1p4 on /usr type xfs (ro)
  /dev/nvme0n1p3 on /boot type ext4 (ro)
  

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  • myersguy@lemmy.simpl.website ⁨2⁩ ⁨months⁩ ago

    An attacker escaping from a container can’t be system root as Podman runs rootless (without some other exploit or weak password).

    That would be true of podman running anywhere, and is not unique to an immutable distribution. This is also clearly not what they are talking about.

    The filesystem itself is also read-only.

    You can change that real quick if you have root access.

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    • asap@lemmy.world ⁨2⁩ ⁨months⁩ ago

      You sound confident, but the fact that Fedora is using the term “immutable” makes me wonder if you actually have domain expertise here.

      Immutable means immutable. It would be strange for them to call it that if it actually means “completely irrelevant from a security perspective”.

      Unless you provide some evidence to the contrary I’m going to assume you aren’t correct.

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      • superkret@feddit.org ⁨2⁩ ⁨months⁩ ago

        The immutability isn’t designed to protect against a malicious attacker with root access.
        Any system is fucked if that happens.
        It’s designed to reduce the workload of the maintainers, because they effectively only need to test and build for one standard image.

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      • myersguy@lemmy.simpl.website ⁨2⁩ ⁨months⁩ ago

        Someone with root can run ostree admin unlock --hotfix to make /usr writable. Someone with root can also delete all restore points.

        It would be strange for them to call it that if it actually means “completely irrelevant from a security perspective”.

        See the comment by superkret.

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• MalReynolds@slrpnk.net ⁨2⁩ ⁨months⁩ ago

  Absitively, use case here IMO is set and forget autoupdate to stay current and SELinux (which actually reduces surface)

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