In Microsoft, we are constantly in search of ways to improve security for our customers. Customers must feel safe when using our services and leaving their precious data in our hands. Sometimes this requires our customers and partners to update client software and this blog post is a warning about just that.
Transport Layer Security (TLS v1.2)
Within the next month…
Before December 31st 2019…
Microsoft will harden security on our docker registries (both mcr.microsoft.com and bcinsider.azurecr.io) and set the required transport level security to v1.2.
This means that all computers running a version of Docker, which doesn’t support TLS v1.2, no longer will be able to pull any Microsoft official images from Microsoft registries.
Only docker 18.03.0 or above
Open a command prompt and run docker version.
Client: Docker Engine - Community Version: 19.03.5 API version: 1.40 Go version: go1.12.12 Git commit: 633a0ea Built: Wed Nov 13 07:22:37 2019 OS/Arch: windows/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.5 API version: 1.40 (minimum version 1.24) Go version: go1.12.12 Git commit: 633a0ea Built: Wed Nov 13 07:36:50 2019 OS/Arch: windows/amd64 Experimental: false
if the docker client or server version is lower than 18.03.0 – you need to update.
NavContainerHelper also displays the docker version when creating containers:
NavContainerHelper is version 0.6.4.20 NavContainerHelper is running as administrator Host is Microsoft Windows 10 Pro - ltsc2019 Docker Client Version is 19.03.5 Docker Server Version is 19.03.5
You should be able to see this in the build output of the agents used by your CI/CD pipelines. With the next version of NavContainerHelper, you will also see a warning if your version of docker is prior to 18.03.0:
WARNING: Microsoft container registries will switch to TLS v1.2 very soon and your version of Docker does not support this. You should install a new version of docker asap (version 18.03.0 or later)
This will be visible in the output of your build agent in CI/CD scenarios when using NavContainerHelper.