[Bug 1786491] Re: grub2 verify signed kernel exists or abort upgrade

[Launchpad Bug Tracker]

This bug was fixed in the package grub2-signed - 1.93.4

---------------
grub2-signed (1.93.4) bionic; urgency=medium

  * Rebuild against grub2 2.02-2ubuntu8.3 and check kernel is signed on
    amd64 EFI before installing grub (LP: #1786491).

 -- Julian Andres Klode <juliank at ubuntu.com>  Mon, 13 Aug 2018 12:51:32
+0200

** Changed in: grub2-signed (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1786491

Title:
  grub2 verify signed kernel exists or abort upgrade

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2-signed package in Ubuntu:
  Fix Released
Status in grub2 source package in Bionic:
  Fix Released
Status in grub2-signed source package in Bionic:
  Fix Released
Status in grub2 source package in Cosmic:
  Fix Released
Status in grub2-signed source package in Cosmic:
  Fix Released

Bug description:
  [Impact]
  grub2 should fail to install if no signed kernels exist

  [Test case]
  On a secure boot system:
  * Install grub-efi-amd64{,signed} and signed kernel => installs
  * Install grub-efi-amd64{,signed} and only unsigned kernel => prevents
  On a non-secure-boot system:
  * Install grub-efi-amd64{,signed} and only unsigned kernel => installs

  [Regression potential]
  Upgrades can break.

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