Ensure that the --service-account-lookup argument is set to true

KCV-0024

Service: kubernetesSeverity: low

OfficialBuilt-inVerified

Validate service account before validating token.

Prowler prowler-provider-iac

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prowler iac --checks KCV-0024

Recommendation

Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the below parameter.

Check Code

# METADATA
# title: "Ensure that the --service-account-lookup argument is set to true"
# description: "Validate service account before validating token."
# scope: package
# schemas:
# - input: schema["kubernetes"]
# related_resources:
# - https://www.cisecurity.org/benchmark/kubernetes
# custom:
#   id: KCV-0024
#   long_id: kubernetes-ensure-service-account-lookup-argument-is-set-to-true
#   aliases:
#     - AVD-KCV-0024
#     - KCV0024
#     - ensure-service-account-lookup-argument-is-set-to-true
#     - kubernetes-ensure-service-account-lookup-argument-is-set-to-true
#   severity: LOW
#   recommended_action: "Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the below parameter."
#   input:
#     selector:
#     - type: kubernetes
package builtin.kubernetes.KCV0024

import rego.v1

import data.lib.kubernetes

check_flag(container) if {
	kubernetes.command_has_flag(container.command, "--service-account-lookup=false")
}

check_flag(container) if {
	kubernetes.command_has_flag(container.args, "--service-account-lookup=false")
}

deny contains res if {
	container := kubernetes.containers[_]
	kubernetes.is_apiserver(container)
	check_flag(container)
	msg := "Ensure that the --service-account-lookup argument is set to true"
	res := result.new(msg, container)
}

References

https://www.cisecurity.org/benchmark/kubernetes