V-242463—The Kubernetes API Server must be set to audit log maximum backup.

CAT II - Medium

CNTR-K8-003300

>Control Description

The Kubernetes API Server must set enough storage to retain logs for monitoring suspicious activity and system misconfiguration, and provide evidence for Cyber Security Investigations.

>Check Content

Change to the /etc/kubernetes/manifests/ directory on the Kubernetes Control Plane.

$grep -i audit-log-maxbackup *

If the setting "audit-log-maxbackup" is not set in the Kubernetes API Server manifest file or it is set less than "10", this is a finding.

>Remediation

Edit the Kubernetes API Server manifest file in the /etc/kubernetes/manifests directory on the Kubernetes Control Plane. Set the value of "--audit-log-maxbackup" to a minimum of "10".

>CCI References

CCI-000366

Control Correlation Identifiers (CCIs) map STIG findings to NIST 800-53 controls.

>Cross-Framework Mappings

NIST SP 800-53 r5

via DISA CCI List

CM-6

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