Heroku-16, Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 10 November 2020

We have updated the heroku-16, heroku-18 and heroku-20 stack images to pick up security fixes in upstream packages. The new stack images will be rolled out automatically over the next 24 hours. You do not need to redeploy your app or manually restart your dynos.

See this Dev Center article for an overview of the packages available in each stack image.

Changelog of packages

The following packages have been changed; a separate section for each stack (if applicable) lists packages that are only available at build time, but not at runtime.

Stack: heroku-16

• Updated ca-certificates from version 20190110~16.04.1 to 20201027ubuntu0.16.04.1
• Updated distro-info-data from version 0.28ubuntu0.14 to 0.28ubuntu0.16
• Updated libfreetype6 from version 2.6.1-0.1ubuntu2.4 to 2.6.1-0.1ubuntu2.5
• Updated libldap-2.4-2 from version 2.4.42+dfsg-2ubuntu3.9 to 2.4.42+dfsg-2ubuntu3.10
• Updated libmysqlclient20 from version 5.7.31-0ubuntu0.16.04.1 to 5.7.32-0ubuntu0.16.04.1
• Updated libperl5.22 from version 5.22.1-9ubuntu0.6 to 5.22.1-9ubuntu0.9
• Updated mysql-common from version 5.7.31-0ubuntu0.16.04.1 to 5.7.32-0ubuntu0.16.04.1
• Updated perl from version 5.22.1-9ubuntu0.6 to 5.22.1-9ubuntu0.9
• Updated perl-base from version 5.22.1-9ubuntu0.6 to 5.22.1-9ubuntu0.9
• Updated perl-modules-5.22 from version 5.22.1-9ubuntu0.6 to 5.22.1-9ubuntu0.9
• Updated tzdata from version 2020a-0ubuntu0.16.04 to 2020d-0ubuntu0.16.04

Updates to packages available at build time only

• Updated libfreetype6-dev from version 2.6.1-0.1ubuntu2.4 to 2.6.1-0.1ubuntu2.5
• Updated libldap2-dev from version 2.4.42+dfsg-2ubuntu3.9 to 2.4.42+dfsg-2ubuntu3.10
• Updated libmysqlclient-dev from version 5.7.31-0ubuntu0.16.04.1 to 5.7.32-0ubuntu0.16.04.1

Stack: heroku-18

• Updated ca-certificates from version 20190110~18.04.1 to 20201027ubuntu0.18.04.1
• Updated distro-info-data from version 0.37ubuntu0.7 to 0.37ubuntu0.9
• Updated libc-bin from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated libc-dev-bin from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated libc6 from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated libc6-dev from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated libfreetype6 from version 2.8.1-2ubuntu2 to 2.8.1-2ubuntu2.1
• Updated libldap-2.4-2 from version 2.4.45+dfsg-1ubuntu1.6 to 2.4.45+dfsg-1ubuntu1.7
• Updated libldap-common from version 2.4.45+dfsg-1ubuntu1.6 to 2.4.45+dfsg-1ubuntu1.7
• Updated libmysqlclient20 from version 5.7.31-0ubuntu0.18.04.1 to 5.7.32-0ubuntu0.18.04.1
• Updated libperl5.26 from version 5.26.1-6ubuntu0.3 to 5.26.1-6ubuntu0.5
• Updated locales from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated multiarch-support from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated perl from version 5.26.1-6ubuntu0.3 to 5.26.1-6ubuntu0.5
• Updated perl-base from version 5.26.1-6ubuntu0.3 to 5.26.1-6ubuntu0.5
• Updated perl-modules-5.26 from version 5.26.1-6ubuntu0.3 to 5.26.1-6ubuntu0.5
• Updated tzdata from version 2020a-0ubuntu0.18.04 to 2020d-0ubuntu0.18.04

Updates to packages available at build time only

• Updated libc6-i386 from version 2.27-3ubuntu1.2 to 2.27-3ubuntu1.3
• Updated libfreetype6-dev from version 2.8.1-2ubuntu2 to 2.8.1-2ubuntu2.1
• Updated libldap2-dev from version 2.4.45+dfsg-1ubuntu1.6 to 2.4.45+dfsg-1ubuntu1.7
• Updated libmysqlclient-dev from version 5.7.31-0ubuntu0.18.04.1 to 5.7.32-0ubuntu0.18.04.1

Stack: heroku-20

• Updated bind9-dnsutils from version 1:9.16.1-0ubuntu2.3 to 1:9.16.1-0ubuntu2.4
• Updated bind9-host from version 1:9.16.1-0ubuntu2.3 to 1:9.16.1-0ubuntu2.4
• Updated bind9-libs from version 1:9.16.1-0ubuntu2.3 to 1:9.16.1-0ubuntu2.4
• Updated ca-certificates from version 20190110ubuntu1.1 to 20201027ubuntu0.20.04.1
• Updated distro-info-data from version 0.43ubuntu1.1 to 0.43ubuntu1.4
• Updated dnsutils from version 1:9.16.1-0ubuntu2.3 to 1:9.16.1-0ubuntu2.4
• Updated libfreetype6 from version 2.10.1-2 to 2.10.1-2ubuntu0.1
• Updated libldap-2.4-2 from version 2.4.49+dfsg-2ubuntu1.3 to 2.4.49+dfsg-2ubuntu1.4
• Updated libldap-common from version 2.4.49+dfsg-2ubuntu1.3 to 2.4.49+dfsg-2ubuntu1.4
• Updated libmysqlclient21 from version 8.0.21-0ubuntu0.20.04.4 to 8.0.22-0ubuntu0.20.04.2
• Updated libperl5.30 from version 5.30.0-9build1 to 5.30.0-9ubuntu0.2
• Updated libsystemd0 from version 245.4-4ubuntu3.2 to 245.4-4ubuntu3.3
• Updated libudev1 from version 245.4-4ubuntu3.2 to 245.4-4ubuntu3.3
• Updated perl from version 5.30.0-9build1 to 5.30.0-9ubuntu0.2
• Updated perl-base from version 5.30.0-9build1 to 5.30.0-9ubuntu0.2
• Updated perl-modules-5.30 from version 5.30.0-9build1 to 5.30.0-9ubuntu0.2
• Updated tzdata from version 2020a-0ubuntu0.20.04 to 2020d-0ubuntu0.20.04
• Updated zlib1g from version 1:1.2.11.dfsg-2ubuntu1.1 to 1:1.2.11.dfsg-2ubuntu1.2

Updates to packages available at build time only

• Updated build-essential from version 12.8ubuntu1 to 12.8ubuntu1.1
• Updated libfreetype-dev from version 2.10.1-2 to 2.10.1-2ubuntu0.1
• Updated libfreetype6-dev from version 2.10.1-2 to 2.10.1-2ubuntu0.1
• Updated libldap2-dev from version 2.4.49+dfsg-2ubuntu1.3 to 2.4.49+dfsg-2ubuntu1.4
• Updated libmysqlclient-dev from version 8.0.21-0ubuntu0.20.04.4 to 8.0.22-0ubuntu0.20.04.2
• Updated libsystemd-dev from version 245.4-4ubuntu3.2 to 245.4-4ubuntu3.3
• Updated libudev-dev from version 245.4-4ubuntu3.2 to 245.4-4ubuntu3.3
• Updated zlib1g-dev from version 1:1.2.11.dfsg-2ubuntu1.1 to 1:1.2.11.dfsg-2ubuntu1.2