Control: 3.2 Ensure that docker.service file permissions are appropriately set

Description

You should verify that the docker.service file permissions are either set to 644 or to a more restrictive value.

The docker.service file contains sensitive parameters that may alter the behavior of the Docker daemon. It should therefore be individually and group owned by the root user in order to ensure that it is not modified or corrupted by a less privileged user.

Remediation

Step 1: Find out the file location:

systemctl show -p FragmentPath docker.service

Step 2: : If the file does not exist, this recommendation is not applicable. If the file exists, execute the command below including the correct file path to set the file permissions to 644. For example

chmod 644 /usr/lib/systemd/system/docker.service

Default Value

This file may not be present on the system. In that case, this recommendation is not applicable. By default, if the file is present, the file permissions are correctly set to 644.