A Docker security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.04, and 21.10.

Content-Language: en-US

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Ubuntu Security Notice USN-5134-1
November 09, 2021

docker.io vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Docker could be made to expose sensitive information over the
network.

Software Description:
- docker.io: Linux container runtime

Details:

An information disclosure issue was discovered in the command line interface
of Docker. A misconfigured credential store could result in supplied
credentials being leaked to the public registry, when using the docker login
command with a private registry.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.10:
docker.io 20.10.7-0ubuntu5.1

Ubuntu 21.04:
docker.io 20.10.7-0ubuntu5~21.04.2

Ubuntu 20.04 LTS:
docker.io 20.10.7-0ubuntu5~20.04.2

Ubuntu 18.04 LTS:
docker.io 20.10.7-0ubuntu5~18.04.3

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5134-1
CVE-2021-41092

Package Information:
  https://launchpad.net/ubuntu/+source/docker.io/20.10.7-0ubuntu5.1
  https://launchpad.net/ubuntu/+source/docker.io/20.10.7-0ubuntu5~21.04.2
  https://launchpad.net/ubuntu/+source/docker.io/20.10.7-0ubuntu5~20.04.2
  https://launchpad.net/ubuntu/+source/docker.io/20.10.7-0ubuntu5~18.04.3