cyberstrikeus 1.1.21 Ensure that the Kubernetes PKI key file permissions are set to 600 (Manual)
Profile Applicability
- Level 1 - Master Node
Description
Ensure that Kubernetes PKI key files have permissions of 600.
Rationale
Kubernetes makes use of a number of key files as part of the operation of its components. The permissions on these files should be set to 600 to protect their integrity and confidentiality.
Impact
None
Audit
Run the below command (based on the file location on your system) on the Control Plane node. For example,
stat -c '%a' /etc/kubernetes/pki/*.key
Verify that the permissions are 600 or more restrictive.
or
ls -l /etc/kubernetes/pki/*.key
Verify that the permissions are -rw------
Remediation
Run the below command (based on the file location on your system) on the Control Plane node. For example,
chmod -R 600 /etc/kubernetes/pki/*.key
Default Value
By default, the keys used by Kubernetes are set to have permissions of 600
References
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists - Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications. | * | * | * |
| v7 | 14.6 Protect Information through Access Control Lists - Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities. | * | * | * |