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 These new images superseded the existing images [2].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:
 * base-files: 10.1ubuntu2.9 => 10.1ubuntu2.10 
 * libx11: 2:1.6.4-3ubuntu0.2 => 2:1.6.4-3ubuntu0.3 
 * linux-meta: 4.15.0.115.103 => 4.15.0.117.104 
 * linux-signed: 4.15.0-115.116 => 4.15.0-117.118 
 * ubuntu-meta: 1.417.4 => 1.417.5 


The following is a complete changelog for this image.
new: {'linux-headers-4.15.0-117-generic': '4.15.0-117.118', 'linux-modules-4.15.0-117-generic': '4.15.0-117.118', 'linux-headers-4.15.0-117': '4.15.0-117.118', 'motd-news-config': '10.1ubuntu2.10'}
removed: {'linux-modules-4.15.0-115-generic': '4.15.0-115.116', 'linux-headers-4.15.0-115-generic': '4.15.0-115.116', 'linux-headers-4.15.0-115': '4.15.0-115.116'}
changed: ['base-files', 'libx11-6:amd64', 'libx11-data', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-4.15.0-117-generic', 'linux-image-virtual', 'linux-virtual', 'ubuntu-minimal', 'ubuntu-server', 'ubuntu-standard']
new snaps: {}
removed snaps: {}
changed snaps: []
==== base-files: 10.1ubuntu2.9 => 10.1ubuntu2.10 ====
====     base-files
  [ Andreas Hasenack ]
  * motd/50-motd-news: don't include uptime in the user-agent string
    (LP: #1886572)
  * Move the /etc/default/motd-news conffile to the motd-news-config
    package (LP: #1888575):
    - d/base-files.maintscript: remove /etc/default/motd-news config file
      on upgrade
    - d/control: break on ubuntu-server << 1.417.5 to force an upgrade if
      it is installed, which will pull motd-news-config and the conffile
      back in
    - d/motd-news-config.postinst:
      + handle the upgrade case where the motd-news config file was
        changed while it belonged to base-files
      + disable motd-news if the config file was removed by hand before
        the upgrade
    - d/postinst.in: signal the motd-news-config package if the
      motd-news config file was removed manually before the upgrade
    - d/control: new motd-news-config package, carrying the
      configuration file for the /etc/update-motd.d/50-motd-news script.
    - d/rules, d/motd-news-config.install: /e/d/motd-news is in the
      motd-news-config package now
  [ Steve Langasek ]
  * motd/50-motd-news: use wget instead of curl, since wget is standard but
    curl is optional (LP: #1888572):
    - This changes the timeout behavior slightly because wget does not have
      an exact equivalent to curl's --max-time argument, we are using
      --timeout instead.
==== libx11: 2:1.6.4-3ubuntu0.2 => 2:1.6.4-3ubuntu0.3 ====
====     libx11-6:amd64 libx11-data
  * SECURITY UPDATE: integer overflow and heap overflow in XIM client
    - debian/patches/CVE-2020-14344-1.patch: fix signed length values in
      modules/im/ximcp/imRmAttr.c.
    - debian/patches/CVE-2020-14344-2.patch: fix integer overflows in
      modules/im/ximcp/imRmAttr.c.
    - debian/patches/CVE-2020-14344-3.patch: fix more unchecked lengths in
      modules/im/ximcp/imRmAttr.c.
    - debian/patches/CVE-2020-14344-4.patch: zero out buffers in functions
      in modules/im/ximcp/imDefIc.c, modules/im/ximcp/imDefIm.c.
    - debian/patches/CVE-2020-14344-5.patch: change the data_len parameter
      to CARD16 in modules/im/ximcp/imRmAttr.c.
    - debian/patches/CVE-2020-14344-6.patch: fix size calculation in
      modules/im/ximcp/imRmAttr.c.
    - debian/patches/CVE-2020-14344-7.patch: fix input clients connecting
      to server in modules/im/ximcp/imRmAttr.c.
    - CVE-2020-14344
  * SECURITY UPDATE: integer overflow and double free in locale handling
    - debian/patches/CVE-2020-14363.patch: fix an integer overflow in
      modules/om/generic/omGeneric.c.
    - CVE-2020-14363
==== linux-meta: 4.15.0.115.103 => 4.15.0.117.104 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 4.15.0-117
==== linux-signed: 4.15.0-115.116 => 4.15.0-117.118 ====
====     linux-image-4.15.0-117-generic
  * Master version: 4.15.0-117.118
==== ubuntu-meta: 1.417.4 => 1.417.5 ====
====     ubuntu-minimal ubuntu-server ubuntu-standard
  * d/control: ubuntu-server depends on motd-news-config
    (LP: #1888575)

--
[1] http://cloud-images.ubuntu.com/releases/bionic/release-20200908/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20200901/