The Docker server certificate key file should be owned by root
Set up the docker integration.
Description
You should verify that the Docker server certificate key file, the file that is passed along with the --tlskey parameter, is individually owned and group owned by root.
Rationale
The Docker server certificate key file should be protected from any tampering or unneeded reads/writes. As it holds the private key for the Docker server certificate, it must be individually owned and group owned by root to ensure that it cannot be accessed by less privileged users.
Audit
Verify that the Docker server certificate key file is individually owned and group-owned by root, by running:
stat -c %U:%G <path to Docker server certificate key file> | grep -v root:root
The command should return no results.
Run the following command: chown root:root <path to Docker server certificate key file>
This sets the individual ownership and group ownership for the Docker server certificate key file to root.
Impact
None
Default value
By default, the individual ownership and group ownership for the Docker server certificate key file is correctly set to root.
References
- https://docs.docker.com/registry/insecure/
- https://docs.docker.com/engine/security/https/
CIS controls
Version 6
5.1 Minimize And Sparingly Use Administrative Privileges - Minimize administrative privileges and only use administrative accounts when they are required. Implement focused auditing on the use of administrative privileged functions and monitor for anomalous behavior.
