Buffer overflow in bootloader shim allows attackers to run code each time devices boot up.
  • dsemy@lemm.eeEnglish
    63·
    9 months ago

    This is a vulnerability in shim, which is a UEFI “bootloader” used by distros mainly to allow booting with the “stock” (Microsoft) secure boot keys.

    If you don’t use secure boot or don’t use shim (likely if you use your own keys), this doesn’t affect you at all.

    In any case this “critical vulnerability” mainly affects machines relying on shim which also boot over unencrypted HTTP.

    • alliswell33 @lemmy.sdf.org
      8·
      9 months ago

      Would this affect systems booting to the refind bootloader without secure boot? Sorry for the ignorance just trying to figure out if I should be changing my system for this news.

      • Jordan_U@lemmy.ml
        5·
        9 months ago

        No.

        This is a vulnerability which allows bypassing secure boot protections. You have already manually bypassed those protections by disabling secure boot.