Details

Verify that the Docker server certificate key file (the file that is passed alongwith ‘–tlskey’parameter) has permissions of ‘400’.

Rationale:

The Docker server certificate key file should be protected from any tampering or unneeded reads. It holds the private key for the Docker server certificate. Hence, itmust have permissions of ‘400’to maintain the integrity of the Docker server certificate.

Solution

chmod 400

This would set the Docker server certificate key file permissions to ‘400’.

Impact:

None.

Default Value:

By default, the permissions for Docker server certificate key file might not be ‘400’. The default file permissions are governed by the system or user specific umask values.

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/1476

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-6b.

Source

• Tenable.com/audits