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 These new images superseded the existing images [2].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:
 * apt: 1.6.12ubuntu0.1 => 1.6.12ubuntu0.2 
 * linux-meta: 4.15.0.20.23 => 4.15.0.124.111 
 * linux-signed: 4.15.0-20.21 => 4.15.0-124.127 
 * python-apt: 1.6.5ubuntu0.3 => 1.6.5ubuntu0.4 


The following is a complete changelog for this image.
new: {'linux-modules-4.15.0-124-generic': '4.15.0-124.127', 'linux-headers-4.15.0-124': '4.15.0-124.127', 'linux-headers-4.15.0-124-generic': '4.15.0-124.127'}
removed: {'linux-modules-4.15.0-20-generic': '4.15.0-20.21', 'linux-headers-4.15.0-20-generic': '4.15.0-20.21', 'linux-headers-4.15.0-20': '4.15.0-20.21'}
changed: ['apt', 'apt-utils', 'libapt-inst2.0:amd64', 'libapt-pkg5.0:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-4.15.0-124-generic', 'linux-image-virtual', 'linux-virtual', 'python-apt-common', 'python3-apt']
new snaps: {}
removed snaps: {}
changed snaps: []
==== apt: 1.6.12ubuntu0.1 => 1.6.12ubuntu0.2 ====
====     apt apt-utils libapt-inst2.0:amd64 libapt-pkg5.0:amd64
  * SECURITY UPDATE: Integer overflow in parsing (LP: #1899193)
    - apt-pkg/contrib/arfile.cc: add extra checks.
    - apt-pkg/contrib/tarfile.cc: limit tar item sizes to 128 GiB
    - apt-pkg/deb/debfile.cc: limit control file sizes to 64 MiB
    - test/*: add tests.
    - CVE-2020-27350
  * Additional hardening:
    - apt-pkg/contrib/tarfile.cc: Limit size of long names and links to 1 MiB
==== linux-meta: 4.15.0.20.23 => 4.15.0.124.111 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 4.15.0-124
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-123
  * Bump ABI 4.15.0-122
  * Bump ABI 4.15.0-121
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-120
  * Bump ABI 4.15.0-119
  * Bump ABI 4.15.0-118
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Miscellaneous Ubuntu changes
    - Ubuntu-4.15.0.116.104
  * Miscellaneous upstream changes
    - Merge tag 'Ubuntu-4.15.0.116.104' into master
  * Bump ABI 4.15.0-117
  * Bump ABI 4.15.0-115
  * Bump ABI 4.15.0-114
  * Bump ABI 4.15.0-113
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-112
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-111
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-110
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-109
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Build and ship a signed wireguard.ko (LP: #1861284)
    - [Packaging] update-version -- add dkms-versions data to sync list
    - [Packaging] expose versioned provides for contained dkms binaries
  * Bump ABI 4.15.0-108
  * Bump ABI 4.15.0-107
  * Bump ABI 4.15.0-106
  * Bump ABI 4.15.0-103
  * Bump ABI 4.15.0-102
  * Bump ABI 4.15.0-101
  * Bump ABI 4.15.0-100
  * Miscellaneous upstream changes
    - Merge tag 'Ubuntu-4.15.0.99.89' into master
  * Bump ABI 4.15.0-99
  * Bump ABI 4.15.0-98
  * Bump ABI 4.15.0-97
  * Bump ABI 4.15.0-96
  * Bump ABI 4.15.0-95
  * Bump ABI 4.15.0-94
  * Bump ABI 4.15.0-93
  * Bump ABI 4.15.0-92
  * Bump ABI 4.15.0-91
  * Bump ABI 4.15.0-90
  * Bump ABI 4.15.0-89
  * Bump ABI 4.15.0-88
  * Packaging resync (LP: #1786013)
    - [Packaging] resync git-ubuntu-log
  * Bump ABI 4.15.0-87
  * Bump ABI 4.15.0-76
  * Bump ABI 4.15.0-75
  * Bump ABI 4.15.0-74
  * Bump ABI 4.15.0-73
  * Bump ABI 4.15.0-72
  * Bump ABI 4.15.0-71
  * Bump ABI 4.15.0-70
  * Bump ABI 4.15.0-69
  * Bump ABI 4.15.0-68
  * Bump ABI 4.15.0-67
  * Bump ABI 4.15.0-66
  * Bump ABI 4.15.0-65
  * Bump ABI 4.15.0-64
  * Bump ABI 4.15.0-63
  * Bump ABI 4.15.0-62
  * Bump ABI 4.15.0-61
  * Bump ABI 4.15.0-60
  * Bump ABI 4.15.0-59
  * Bump ABI 4.15.0-58
  * Bump ABI 4.15.0-57
  * Bump ABI 4.15.0-56
  * Bump ABI 4.15.0-55
  * Bump ABI 4.15.0-54
  * Bump ABI 4.15.0-53
  * Bump ABI 4.15.0-52
  * Bump ABI 4.15.0-51
  * Bump ABI 4.15.0-50
  * Bump ABI 4.15.0-49
  * bionic: fork out linux-snapdragon into its own topic kernel (LP: #1820868)
    - remove snapdragon meta packages
  * Bump ABI 4.15.0-48
  * Bump ABI 4.15.0-47
  * Bump ABI 4.15.0-46
  * Bump ABI 4.15.0-45
  * Bump ABI 4.15.0-44
  * Bump ABI 4.15.0-43
  * Bump ABI 4.15.0-42
  * Bump ABI 4.15.0-41
  * Bump ABI 4.15.0-40
  * Bump ABI 4.15.0-39
  * Bump ABI 4.15.0-38
  * Bump ABI 4.15.0-37
  * Bump ABI 4.15.0-36
  * Bump ABI 4.15.0-35
  * Bump ABI 4.15.0-34
  * Bump ABI 4.15.0-33
  * Bump ABI 4.15.0-32
  * Bump ABI 4.15.0-31
  * Bump ABI 4.15.0-30
  * Bump ABI 4.15.0-29
  * Bump ABI 4.15.0-28
  * Bump ABI 4.15.0-27
  * Bump ABI 4.15.0-26
  * Bump ABI 4.15.0-25
  * Bump ABI 4.15.0-24
  * linux-crashdump isn't built for arm64 (LP: #1773407)
    - Generate linux-crashdump metapackage for arm64
  * Need to ensure microcode updates are available to all bare-metal installs
    of Ubuntu (LP: #1738259)
    - Make kernel image packages depend on cpu microcode updates
  * Bump ABI 4.15.0-23
  * Bump ABI 4.15.0-22
  * Bump ABI 4.15.0-21
  * Bump ABI 4.15.0-20
  * Bump ABI 4.15.0-19
  * Bump ABI 4.15.0-18
  * signing: only install a signed kernel (LP: #1764794)
    - switch to linux-image as signed when available
    - convert linux-signed* into transitional packages
  * Bump ABI 4.15.0-17
  * Merge the linux-snapdragon kernel into bionic master/snapdragon
    (LP: #1763040)
    - Add snapdragon meta packages
  * Bump ABI 4.15.0-16
  * Bump ABI 4.15.0-15
  * Bump ABI 4.15.0-14
  * Miscellaneous Ubuntu changes
    - add 16.04 to 18.04 transitional packages for hwe and hwe-edge
  * Bump ABI 4.15.0-13
  * Bump ABI 4.15.0-12
  * Bump ABI 4.15.0-11
  * Bump ABI 4.15.0-10
  * Bump ABI 4.15.0-9
  * Bump ABI 4.15.0-8
  * Bump ABI 4.15.0-7
  * Bump ABI 4.15.0-6
  * Bump ABI 4.15.0-5
  * Bump ABI 4.15.0-4
  * Bump ABI 4.15.0-3
  * Bump ABI 4.15.0-2
  * Bump ABI 4.15.0-1
  * Bump ABI 4.15.0-0
  * Bump ABI 4.14.0-11
  * Bump ABI 4.14.0-10
  * Bump ABI 4.14.0-9
  * Bump ABI 4.14.0-8
  * Bump ABI 4.14.0-7
  * Bump ABI 4.14.0-6
  * Bump ABI 4.14.0-5
  * Bump ABI 4.14.0-4
  * Bump ABI 4.14.0-3
  * Bump ABI 4.14.0-2
  * Bump ABI 4.14.0-1
  * Bump ABI 4.14.0-0
  * Bump ABI 4.13.0-11
  * Bump ABI 4.13.0-10
  * Bump ABI 4.13.0-9
  * Bump ABI 4.13.0-8
  * Bump ABI 4.13.0-7
  * Bump ABI 4.13.0-6
  * Bump ABI 4.13.0-5
  * Bump ABI 4.13.0-4
  * Bump ABI 4.13.0-3
  * Bump ABI 4.13.0-2
  * Bump ABI 4.13.0-1
  * Bump ABI 4.13.0-0
  * Bump ABI 4.12.0-7
  * Bump ABI 4.12.0-6
  * Bump ABI 4.12.0-5
  * Bump ABI 4.12.0-4
  * Bump ABI 4.12.0-3
  * Bump ABI 4.12.0-2
  * Bump ABI 4.12.0-1
  * Bump ABI 4.12.0-0
  * Bump ABI 4.11.0-3
  * Bump ABI 4.11.0-2
  * Bump ABI 4.11.0-1
  * Empty stanza
  * Bump ABI 4.10.0-20
  * Bump ABI 4.10.0-19
  * Bump ABI 4.10.0-18
  * Bump ABI 4.10.0-17
  * Bump ABI 4.10.0-16
  * Bump ABI 4.10.0-15
  * Bump ABI 4.10.0-14
  * Bump ABI 4.10.0-13
  * Bump ABI 4.10.0-12
  * Bump ABI 4.10.0-11
  * Bump ABI 4.10.0-10
  * Bump ABI 4.10.0-9
  * Restored powerpc. 
  * Bump ABI 4.10.0-8
  * Bump ABI 4.10.0-7
  * Bump ABI 4.10.0-6
  * Bump ABI 4.10.0-5
  * Miscellaneous Ubuntu changes
    - Drop powerpc flavors
  * Bump ABI 4.10.0-4
  * Bump ABI 4.10.0-3
  * Bump ABI 4.10.0-2
  * Bump ABI 4.10.0-1
  * Bump ABI 4.10.0-0
  * Bump ABI 4.9.0-11
  * Fixed the kernel FTBS, so reenable powerpc64-emb 
  * Bump ABI 4.9.0-10
  * Bump ABI 4.9.0-9
  * Bump ABI 4.9.0-8
  * Bump ABI 4.9.0-7
  * Bump ABI 4.9.0-6
  * Bump ABI 4.9.0-5
  * Bump ABI 4.9.0-4
  * UBUNTU: Drop powerpc64-emb pending build fixes 
  * Dropped transitionals
  * Bump ABI 4.9.0-3
  * Bump ABI 4.9.0-2
  * Bump ABI 4.9.0-1
  * Bump ABI 4.9.0-0
  * Empty stanza
  * Bump ABI 4.8.0-27
  * Bump ABI 4.8.0-26
  * Bump ABI 4.8.0-25
  * Bump ABI 4.8.0-24
  * Bump ABI 4.8.0-23
  * Bump ABI 4.8.0-22
  * Bump ABI 4.8.0-21
  * Bump ABI 4.8.0-20
  * Bump ABI 4.8.0-19
  * Bump ABI 4.8.0-17
  * linux-virtual flavour missing for arm64 in yakkety (LP: #1626868)
    - arm64 -- add virtual flavour
  * Bump ABI 4.8.0-16
  * Bump ABI 4.8.0-15
  * Bump ABI 4.8.0-14
  * Bump ABI 4.8.0-13
  * Bump ABI 4.8.0-12
  * Bump ABI 4.8.0-11
  * Miscellaneous Ubuntu changes
    - armhf does not have -extra split
  * Miscellaneous Ubuntu changes
    - arm64 -generic flavour has -extra split
  * Bump ABI 4.8.0-10
  * Bump ABI 4.8.0-9
  * Bump ABI 4.8.0-8
  * Bump ABI 4.8.0-8
  * Bump ABI 4.8.0-7
  * Bump ABI 4.8.0-5
  * Bump ABI 4.8.0-4
  * Bump ABI 4.8.0-3
  * Bump ABI 4.8.0-2
  * Fix the powerpc64-smp -> generic transition and add virtual.
  * Update to Standards-Version 3.9.8, and fix-ups where needed.
  * Bump ABI 4.6.0-10
  * ensure all items are included in changelog and standardise packaging
    (LP: #1601954)
    - simplify meta package packaging
    - add git-ubuntu-log for changelog formatting
    - add update-version to simplify updates
  * switch powerpc flavour from -powerpc-smp to -generic.
  * drop LTS transtional packages.
  * build-arch and build-indep are now manditory targets (LP: #1603504)
  * linux ABI 4.6.0-9
  * linux ABI 4.6.0-8
  * linux ABI 4.6.0-7
  * linux ABI 4.6.0-6
  * linux ABI 4.4.0-20
  * linux ABI 4.4.0-19
  * linux ABI 4.4.0-18
  * linux ABI 4.4.0-17
  * add linux-crashdump to s390x and armhf.  (LP: #1560015)
  * linux ABI 4.4.0-16
  * linux ABI 4.4.0-15
  * linux ABI 4.4.0-14
  * linux ABI 4.4.0-13
  * linux ABI 4.4.0-12
  * Build-Depends: on the common headers to ensure we wait for _all to build
  * linux ABI 4.4.0-11
  * linux ABI 4.4.0-10
  * linux ABI 4.4.0-9
  * linux ABI 4.4.0-8
  * linux ABI 4.4.0-7
  * Drop linux-cloud-tools-virtual for ppc64el and s390x as we actually
    do not generate those currently.
  * virtual: add linux-tools-virtual, linux-cloud-tools-virtual, and
    linux-image-extra-virtual linkage for ppc64el and s390x.
  * transitional packages: drop updates for transitional which were
    uninstallable in Trusty and have no candidates in Xenial.
  [ Andy Whitcroft ]
  * Add 14.04 to 16.04 transitional packages (LP: #1526931):
   - add packages for the HWE auto upgrade packages.
   - add packages for all of the lts backport packages.
  [ Tim Gardner ]
  * linux ABI 4.4.0-6 
  * * linux ABI 4.4.0-5
  * linux ABI 4.4.0-4
  * ensure we rebuild debian/control on clean
  * linux ABI 4.4.0-3
  * linux ABI 4.4.0-2
  * linux ABI 4.4.0-1
  * s390x: add s390x to -generic and -virtual.
  * s390x: add s390x to build dependancies to hold off testing.
  * linux ABI 4.4.0-0
  * linux ABI 4.3.0-0
  * linux ABI 4.2.0-17
  * Revert temporary addition of virtualbox-guest-modules [i386 amd64
    x32] provides.  (LP: #1507588)
  * temporarily add virtualbox-guest-modules [i386 amd64 x32] provides
    to fix vbox installs.  (See LP: 1507588)
  * linux ABI 4.2.0-16
  * linux ABI 4.2.0-15
  * linux ABI 4.2.0-14
  * Makefile: ignore dependencies when building the package
  * move linux-signed linux-image-extra-* dependencies over to linux-meta.
    (LP: #1501235)
  * linux ABI 4.2.0-13
  * add linux-signed-lowlatency packages.  (LP: #1500910)
  * linux ABI 4.2.0-12
  * linux ABI 4.2.0-11
  * linux ABI 4.2.0-10
  * linux ABI 4.2.0-9
  * linux ABI 4.2.0-8
  * linux ABI 4.2.0-7
  * linux ABI 4.2.0-6
  * linux ABI 4.2.0-5
  *   * linux ABI 4.2.0-4
  * linux ABI 4.2.0-3
  * linux ABI 4.1.0-3
  * linux ABI 4.1.0-2
  * linux ABI 4.1.0-1
  * fix up Vcs-Git: to point to launchpad
  * linux ABI 4.0.0-4
  * linux ABI 4.0.0-3
  * linux ABI 4.0.0-2
  * Fixes ppc64el build failure, add OverlayFS V1 support.
  * linux ABI 4.0.0-1
  * linux ABI 3.19.0-22
  * linux ABI 3.19.0-21
  * linux ABI 3.19.0-20
  * linux ABI 3.19.0-19
  * linux ABI 3.19.0-18
  * linux ABI 3.29.0-17
  * linux ABI 3.29.0-16
  * linux ABI 3.29.0-15
  [ Andy Whitcroft ]
  * future proof VCS links
  [ Andy Whitcroft ]
  * rejig so we correctly link to our own packages
  * make the meta-source trivially backportable
  * linux ABI 3.29.0-12
  * linux ABI 3.19.0-11
  * linux ABI 3.19.0-10
  * linux ABI 3.19.0-9
  * linux ABI 3.19.0-8
  * linux ABI 3.19.0-7
  * linux ABI 3.19.0-6
  * linux ABI 3.19.0-5
  * linux ABI 3.19.0-4
  [ Kamal Mostafa ]
  * [Packaging] force "dpkg-source -I -i" behavior
  [ Andy Whitcroft]
  * linux ABI 3.19.0-3
  * linux ABI 3.19.0-2
  * linux ABI 3.18.0-14
  * linux ABI 3.18.0-13
  * linux ABI 3.18.0-12
  [ Kamal Mostafa ]
  * [Packaging] force "dpkg-source -I -i" behavior
  [ Leann Ogasawara ]
  * linux ABI 3.18.0-11
  * linux ABI 3.18.0-10
  * linux ABI 3.18.0-9
  * linux ABI 3.18.0-8
  * linux ABI 3.18.0-7
  * linux ABI 3.18.0-6
  * linux ABI 3.18.0-5
  * linux ABI 3.18.0-4
  * linux ABI 3.18.0-3
  * linux ABI 3.18.0-2
  [ Andy Whitcroft ]
  * downgrade thermald to a Recommends: so that it can be removed when
    it is not needed.  (LP: #1387144)
  * linux ABI 3.18.0-1
==== linux-signed: 4.15.0-20.21 => 4.15.0-124.127 ====
====     linux-image-4.15.0-124-generic
  * Master version: 4.15.0-124.127
  * Master version: 4.15.0-123.126
  * Master version: 4.15.0-122.124
  * Master version: 4.15.0-121.123
  * Master version: 4.15.0-120.122
  * Master version: 4.15.0-119.120
  * Master version: 4.15.0-118.119
  * Miscellaneous Ubuntu changes
    - Ubuntu-4.15.0-116.117
  * Miscellaneous upstream changes
    - Merge tag 'Ubuntu-4.15.0-116.117' into master
  * Master version: 4.15.0-117.118
  * Master version: 4.15.0-115.116
  * Master version: 4.15.0-114.115
  * Master version: 4.15.0-113.114
  * Master version: 4.15.0-112.113
  * Master version: 4.15.0-111.112
  * Master version: 4.15.0-110.111
  * Master version: 4.15.0-109.110
  * Master version: 4.15.0-108.109
  * Master version: 4.15.0-107.108
  * Master version: 4.15.0-106.107
  * Master version: 4.15.0-103.104
  * Master version: 4.15.0-102.103
  * Master version: 4.15.0-101.102
  * Master version: 4.15.0-100.101
  * Miscellaneous upstream changes
    - Merge tag 'Ubuntu-4.15.0-99.100' into master
  * Master version: 4.15.0-99.100
  * Master version: 4.15.0-98.99
  * Master version: 4.15.0-97.98
  * Master version: 4.15.0-96.97
  * Master version: 4.15.0-95.96
  * Master version: 4.15.0-94.95
  * Master version: 4.15.0-93.94
  * Master version: 4.15.0-92.93
  * Master version: 4.15.0-91.92
  * Master version: 4.15.0-90.91
  * Bump upload number.
  * Master version: 4.15.0-90.90
  * Master version: 4.15.0-89.89
  * Master version: 4.15.0-88.88
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/templates
    - [Packaging] resync git-ubuntu-log
  * Master version: 4.15.0-87.87
  * Master version: 4.15.0-76.86
  * Master version: 4.15.0-75.85
  * Master version: 4.15.0-74.84
  * Master version: 4.15.0-74.83
  * Master version: 4.15.0-73.82
  * Master version: 4.15.0-72.81
  * Master version: 4.15.0-71.80
  * Master version: 4.15.0-70.79
  * Master version: 4.15.0-69.78
  * Master version: 4.15.0-68.77
  * Master version: 4.15.0-67.76
  * Master version: 4.15.0-66.75
  * vmlinuz is world-readable (LP: #1843327)
    - fix vmlinuz-* permissions for opal signed kernels
  * Master version: 4.15.0-65.74
  * Master version: 4.15.0-64.73
  * Master version: 4.15.0-63.72
  * Master version: 4.15.0-63.71
  * Master version: 4.15.0-63.70
  * Master version: 4.15.0-62.69
  * Master version: 4.15.0-61.68
  * Master version: 4.15.0-60.67
  * Master version: 4.15.0-59.66
  * Master version: 4.15.0-59.65
  * Master version: 4.15.0-58.64
  * Master version: 4.15.0-57.63
  * Master version: 4.15.0-56.62
  * Master version: 4.15.0-55.60
  * Master version: 4.15.0-55.59
  * Master version: 4.15.0-54.58
  * Master version: 4.15.0-53.57
  * Master version: 4.15.0-52.56
  * Master version: 4.15.0-51.55
  * Built-Using incorrect (LP: #1824016)
    - Rename "VERSION" template string to more precise "UNSIGNED_SRC_VERSION"
    - Use the correct source package name in Built-Using field
  * Master version: 4.15.0-50.54
  * Master version: 4.15.0-49.53
  * Master version: 4.15.0-49.52
  * Master version: 4.15.0-48.51
  * Master version: 4.15.0-47.50
  * Master version: 4.15.0-46.49
  * Miscellaneous Ubuntu changes
    - [Packaging] download-signed -- fix downloader component and handle versions
      correctly
  * Master version: 4.15.0-45.48
  * Master version: 4.15.0-44.47
  * Master version: 4.15.0-43.46
  * Master version: 4.15.0-42.45
  * Master version: 4.15.0-41.44
  * Master version: 4.15.0-40.43
  * Master version: 4.15.0-39.42
  * Master version: 4.15.0-38.41
  * Master version: 4.15.0-37.40
  * Master version: 4.15.0-36.39
  * Master version: 4.15.0-35.38
  * Master version: 4.15.0-34.37
  * Master version: 4.15.0-33.36
  * Master version: 4.15.0-32.35
  * Master version: 4.15.0-31.33
  * Master version: 4.15.0-30.32
  * Master version: 4.15.0-29.31
  * Master version: 4.15.0-28.30
  * Master version: 4.15.0-27.29
  * Master version: 4.15.0-26.28
  * Master version: 4.15.0-25.27
  * Master version: 4.15.0-24.26
  * Master version: 4.15.0-23.25
  * Master version: 4.15.0-22.24
  * Master version: 4.15.0-21.22
==== python-apt: 1.6.5ubuntu0.3 => 1.6.5ubuntu0.4 ====
====     python-apt-common python3-apt
  * SECURITY UPDATE: various memory and file descriptor leaks (LP: #1899193)
    - python/arfile.cc, python/generic.h, python/tag.cc, python/tarfile.cc:
      fix file descriptor and memory leaks
    - python/apt_instmodule.cc, python/apt_instmodule.h, python/arfile.h:
      Avoid reference cycle with control,data members in apt_inst.DebFile
      objects
    - tests/test_cve_2020_27351.py: Test cases for DebFile (others not easily
      testable)
    - CVE-2020-27351
  * data/templates: Update mirror lists

--
[1] http://cloud-images.ubuntu.com/releases/bionic/release-20201211.1/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20201209/