A new release of the Ubuntu Cloud Images for stable Ubuntu release 18.04 LTS (Bionic Beaver) is available at [1]. These new images superseded the existing images [2]. Images are available for download or immediate use on EC2 via publish AMI ids. Users who wish to update their existing installations can do so with:
   'sudo apt-get update && sudo apt-get dist-upgrade && sudo reboot'.

The following packages have been updated. Please see the full changelogs
for a complete listing of changes:
 * apport: 2.20.9-0ubuntu7.19 => 2.20.9-0ubuntu7.20 
 * grub2: 2.02-2ubuntu8.18 => 2.02-2ubuntu8.19 
 * grub2-signed: 1.93.20+2.02-2ubuntu8.18 => 1.93.21+2.02-2ubuntu8.19 


The following is a complete changelog for this image.
new: {}
removed: {}
changed: ['apport', 'grub-common', 'grub-efi-amd64', 'grub-efi-amd64-bin', 'grub-efi-amd64-signed', 'grub-pc', 'grub-pc-bin', 'grub2-common', 'python3-apport', 'python3-problem-report']
new snaps: {}
removed snaps: {}
changed snaps: []
==== apport: 2.20.9-0ubuntu7.19 => 2.20.9-0ubuntu7.20 ====
====     apport python3-apport python3-problem-report
  * Various security hardening fixes (LP: #1903332)
    - apport/fileutils.py: drop privileges in the correct order, limit
      settings file size.
    - apport/apport/report.py: properly drop privileges, limit ignore file
      size.
    - data/apport: drop supplemental groups.
==== grub2: 2.02-2ubuntu8.18 => 2.02-2ubuntu8.19 ====
====     grub-common grub-efi-amd64 grub-efi-amd64-bin grub-pc grub-pc-bin grub2-common
  * grub-install: cherry-pick patch from grub-devel to make grub-install
    fault tolerant. Create backup of files in /boot/grub, and restore them
    on failure to complete grub-install. LP: #1891680
    Also cherry-pick patch to make atexit work correctly.
  * postinst.in: do not exit successfully when failing to show critical
    grub-pc/install_devices_failed and grub-pc/install_devices_empty
    prompts in non-interactive mode. This enables surfacing upgrade errors
    to the users and/or automation. LP: #1891680 LP: #1896608
  * postinst.in: do not attempt to call grub-install upon fresh install of
    grub-pc because it it a job of installers to do that after fresh
    install. Fixup for the issue unmasked by above. LP: #1891680
  * postinst.in: Fixup postinst.in, to attempt grub-install upon explicit
    dpkg-reconfigure grub-pc. LP: #1892526
==== grub2-signed: 1.93.20+2.02-2ubuntu8.18 => 1.93.21+2.02-2ubuntu8.19 ====
====     grub-efi-amd64-signed

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[1] http://cloud-images.ubuntu.com/releases/bionic/release-20201112/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20201111/