Title

The Kubernetes PKI CRT must have file permissions set to 644 or more restrictive. (Cat II impact)

Discussion

The Kubernetes PKI directory contains all certificates (.crt files) supporting secure network communications in the Kubernetes Control Plane. If these files can be modified, data traversing within the architecture components would become unsecure and compromised.

Check Content

Review the permissions of the Kubernetes PKI cert files by using the command: sudo find /etc/kubernetes/pki/* -name "*.crt" | xargs stat -c '%n %a' If any of the files have permissions more permissive than "644", this is a finding.

Fix Text

Change the ownership of the cert files to "644" by executing the command: find /etc/kubernetes/pki -name "*.crt" | xargs chmod 644

Additional Identifiers

Rule ID: SV-242466r961863_rule

Vulnerability ID: V-242466

Group Title: SRG-APP-000516-CTR-001335

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.