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Control: 3.12 Ensure that the Docker server certificate file permissions are set to 444 or more restrictively


You should verify that the Docker server certificate file (the file that is passed along with the --tlscert parameter) has permissions of 444 or more restrictive permissions.

The Docker server certificate file should be protected from any tampering. It is used to authenticate the Docker server based on the given server certificate. It should therefore have permissions of 444 to prevent its modification.


The following command could be executed:

chmod 444 <path to Docker server certificate file>

This sets the file permissions of the Docker server certificate file to 444.

Default Value

By default, the permissions for the Docker server certificate file might not be 444. The default file permissions are governed by the operating system or user specific umask values.


Run the control in your terminal:

steampipe check docker_compliance.control.cis_v160_3_12

Snapshot and share results via Steampipe Cloud:

steampipe login
steampipe check --share docker_compliance.control.cis_v160_3_12


This control uses a named query: