** Description changed: - A Secure Boot system that has Canonical's key in the db can boot can - boot our signed GRUB directly (i.e., w/o chaining through shim). In this - configuration, GRUB will permit booting unsigned kernels. Reported by - Ard Biesheuvel of Linaro. + Our current SB policy is to allow fallback to unsigned kernels, but we + are in the process of changing this policy to require valid signatures. + GRUB in disco should already be enforcing this new policy, but Ard + Biesheuvel of Linaro discovered a corner case. + + A system that has Canonical's key in the db can boot our signed GRUB + directly (i.e., w/o chaining through shim). In this configuration, GRUB + fails to detect that it is unable to validate signatures, and will + permit booting unsigned kernels.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1810842 Title: Allows booting unsigned kernel when not using shim To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1810842/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
