CVE-2021-41092: Docker CLI leaks private registry credentials to registry-1.docker.io
Impact
A bug was found in the Docker CLI where running docker login my-private-registry.example.com with a misconfigured configuration file (typically ~/.docker/config.json) listing a credsStore or credHelpers that could not be executed would result in any provided credentials being sent to registry-1.docker.io rather than the intended private registry.
Patches
This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as soon as possible.
Workarounds
Ensure that any configured credsStore or credHelpers entries in the configuration file reference an installed credential helper that is executable and on the PATH.
For more information
If you have any questions or comments about this advisory:
Open an issue Email us at security@docker.com if you think you’ve found a security bug
Other sources
Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker CLI where running docker login my-private-registry.example.com with a misconfigured configuration file (typically ~/.docker/config.json) listing a credsStore or credHelpers that could not be executed would result in any provided credentials being sent to registry-1.docker.io rather than the intended private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries in the configuration file reference an installed credential helper that is executable and on the PATH.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
go/github.com/docker/clito a version that resolves this vulnerability.Fixed in 20.10.9 - Upgrade
Upgrade
docker/clito a version that resolves this vulnerability.Fixed in 20.10.9 - Configuration
Ensure any configured credsStore or credHelpers entries in ~/.docker/config.json point to a credential helper binary that is installed, executable, and available on the PATH.
Docker CLI credsStore/credHelpers entries in ~/.docker/config.json = Reference an installed credential helper that is executable and on the PATH
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-41092.
What is the severity of CVE-2021-41092?
The severity of CVE-2021-41092 is high, with a CVSS score of 7.5.
What is the affected software?
The affected software includes Docker Command Line Interface, Fedora 34, and Fedora 35.
What is the description of CVE-2021-41092?
CVE-2021-41092 is a bug found in the Docker CLI where running 'docker login my-private-registry.example.com' with a misconfigured configuration file can lead to credential leakage.
Is there a fix available for CVE-2021-41092?
Yes, a fix is available for CVE-2021-41092. It is recommended to update to the latest version of Docker CLI.