I’m setting up FDE and wonders which one is better. “LVM over LUKS” or “LUKS over LVM”? Or something else? Does one is definitely better then the other? What are your preference?

Thanks.

  • umami_wasabi@lemmy.mlOP
    0·
    9 months ago

    For secure boot bypasses I could only find BlackLotus is the only one capable to do this. I would like to have more details to support the claim “Secure Boot has been hacked in a minute.” Also, I would like the explanation on secure boot is a false sense of security and points to suport such claim as BlackLotus is the only publicly known malware to bypass secure boot.

    However, I do firmly believe that there ia no reason that servers can’t use FDE as they are no differ than other typical computer.

    EDIT: forgot the “boot” for secure boot

    • TMP_NKcYUEoM7kXg4qYe@lemmy.world
      1·
      8 months ago

      The secure boot vulnerability was shown on a lenovo laptop. I’ve found https://www.welivesecurity.com/2022/04/19/when-secure-isnt-secure-uefi-vulnerabilities-lenovo-consumer-laptops/, but I’m not sure whether it’s the same thing I was talking about. The attack abused the fact that the TPM chip was outside the CPU so it was possible to read the keys in plain text by just putting a clip on the chip. The laptops in the ESET article seem fairly new so I would expect them to have TPM inside the CPU.

      I recommend reading “threat model” page on Heads OS’ website. Secure boot can be disabled in the UEFI settings which can be accessed by unplugging the CMOS battery to reset the UEFI password. Undoing a few screws takes a few seconds so the bottleneck would be how fast you can upload your fake login screen onto the drive.

      Servers can use FDE obviously but using them becomes highly inconvenient if you enable that. In order to boot you need to decrypt the drive but how are going to connect to the server if it hasn’t booted yet? One solution is to only boot the server when you have local access. The issue rises when your server crashes. Alternatively you can either start sshd early in the boot process at which point it isn’t really FDE or have some kind of KVM which just shifts the issue to a different device.