• hddsx@lemmy.ca
    link
    fedilink
    English
    arrow-up
    2
    ·
    8 months ago

    Huh. I must be outdated. I didn’t know they got secure boot working. So what do you do when you need to update your kernel? Or does the fact that it comes from the package manager mean that it is allowed to update that?

    • Kevin@programming.dev
      link
      fedilink
      English
      arrow-up
      4
      ·
      8 months ago

      Generally yes. For many distros, the kernel signing key is with the distro maintainers and so the package comes with pre-signed kernel images. For distros like Arch and Gentoo, it’s the user’s responsibility to maintain the signing key and sign each updated kernel

        • Kevin@programming.dev
          link
          fedilink
          English
          arrow-up
          2
          ·
          8 months ago

          The firmware has to allow it, so if you’ve got physical access to the machine that’s possible. Remote access root, on the other hand, can’t tell the firmware to register new keys as long as it’s configured correctly

    • henfredemars@infosec.pub
      link
      fedilink
      English
      arrow-up
      4
      ·
      8 months ago

      The package manager doesn’t have special permission. The new kernel you download is also signed for you and trusted by your system.

      If it wasn’t trusted, would the next time you boot the kernel won’t load because the bootloader will refuse to load the unsigned code.