Details

Verify that the TLS CAcertificate file (the file that is passed alongwith ‘–tlscacert’parameter) has permissions of ‘444’or more restrictive.

Rationale:

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

Solution

chmod 444

This would set the file permissions of the TLS CA file to ‘444’.

Impact:

None.

Default Value:

By default, the permissions for TLS CA 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/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