cyberstrikeus CIS Kubernetes Benchmark v1.12.0 - Control 4.1.7
Description
Ensure that the certificate authorities file has permissions of 644 or more restrictive.
Rationale
The certificate authorities file controls the authorities used to validate API requests. You should restrict its file permissions to maintain the integrity of the file. The file should be writable by only the administrators on the system.
Impact
None
Audit Procedure
Step 1: Find the client-ca-file
Run the following command:
ps -ef | grep kubelet
Find the file specified by the --client-ca-file argument.
Step 2: Verify file permissions
Run the following command:
stat -c %a <filename>
Verify that the permissions are 644 or more restrictive.
Remediation
Run the following command to modify the file permissions of the --client-ca-file:
chmod 644 <filename>
Default Value
By default no --client-ca-file is specified.
References
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control ListsConfigure 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 ListsProtect all information stored on systems with file system, network share, claims, application, or database specific access control lists. | ● | ● | ● |
Profile Applicability
- Level 1 - Worker Node
Assessment Status
Manual