Details

Verify that the Docker server certificate file (the file that is passed alongwith –tlscert parameter) has permissions of 444 or more restrictive.

Rationale:

The Docker server certificate file should be protected from any tampering. It is used to authenticate Docker server based on the given server certificate. Hence, it must have permissions of 444 to maintain the integrity of the certificate.

Solution

chmod 444 This would set the file permissions of the Docker server file to 444.
Impact:
None.
Default Value:
By default, the permissions for Docker server certificate file might not be 444. 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/1726

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.
• CSCv6|14.4

Source

• Tenable.com/audits