[Bug 1990326] [NEW] ubuntu server 20.04.5 cannot be installed after enable secure boot

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Matthieu Clemenceau (mclemenceau):

Reproduce steps
1. Enable secure boot in the UEFI.
2. Fresh install ubuntu server 20.04.5 lts and latest daily build, but it fail with "An unauthorized EFI image is detected, please enroll this EFI image or disable secure boot ...."

Others:
1. Both ubuntu server 18.04.6 and 22.04 can be normal installed.

It seem the key of 20.04.x has been added into the latest UEFI
Revocation List File(Release Date: August 12,
2022.https://uefi.org/revocationlistfile/archive).

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: shim (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: debian-installer (Ubuntu Focal)
     Importance: Critical
         Status: New

** Affects: shim (Ubuntu Focal)
     Importance: Undecided
         Status: New

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ubuntu server 20.04.5 cannot be installed after enable secure boot
https://bugs.launchpad.net/bugs/1990326
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