Information
Within Kubernetes, audit data for all components is generated by the API server. This audit data is important when there are issues, to include security incidents that must be investigated. To make the audit data worthwhile for the investigation of events, it is necessary to have the appropriate and required data logged. To fully understand the event, it is important to identify any users associated with the event.
The API server policy file allows for the following levels of auditing:
None - Do not log events that match the rule.
Metadata - Log request metadata (requesting user, timestamp, resource, verb, etc.) but not request or response body.
Request - Log event metadata and request body but not response body.
RequestResponse - Log event metadata, request, and response bodies.
Satisfies: SRG-APP-000026-CTR-000070, SRG-APP-000027-CTR-000075, SRG-APP-000028-CTR-000080, SRG-APP-000101-CTR-000205, SRG-APP-000100-CTR-000200, SRG-APP-000100-CTR-000195, SRG-APP-000099-CTR-000190, SRG-APP-000098-CTR-000185, SRG-APP-000095-CTR-000170, SRG-APP-000096-CTR-000175, SRG-APP-000097-CTR-000180, SRG-APP-000507-CTR-001295, SRG-APP-000504-CTR-001280, SRG-APP-000503-CTR-001275, SRG-APP-000501-CTR-001265, SRG-APP-000500-CTR-001260, SRG-APP-000497-CTR-001245, SRG-APP-000496-CTR-001240, SRG-APP-000493-CTR-001225, SRG-APP-000492-CTR-001220, SRG-APP-000343-CTR-000780, SRG-APP-000381-CTR-000905
NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.
Solution
Edit the Kubernetes API Server audit policy and set it to look like the following:
# Log all requests at the RequestResponse level.
apiVersion: audit.k8s.io/vX (Where X is the latest apiVersion)
kind: Policy
rules:
- level: RequestResponse
Item Details
References: CAT|II, CCI|CCI-000018, CCI|CCI-000130, CCI|CCI-000131, CCI|CCI-000132, CCI|CCI-000133, CCI|CCI-000134, CCI|CCI-000135, CCI|CCI-000172, CCI|CCI-001403, CCI|CCI-001404, CCI|CCI-001487, CCI|CCI-001844, CCI|CCI-002264, Rule-ID|SV-242403r879525_rule, STIG-ID|CNTR-K8-000700, Vuln-ID|V-242403
Control ID: 2c086178b84f0538dd69b3137974189395ce6c66e0e359331b15df5ded12a430