Classification:

compliance

Framework:

cis-docker

Control:

3.13

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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.

Remediation

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

1. https://docs.docker.com/registry/insecure/
2. 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.