For AI agents: A markdown version of this page is available at https://docs.datadoghq.com/security/code_security/iac_security/iac_rules/k8s/service_account_lookup_set_to_false.md. A documentation index is available at /llms.txt.

Service account lookup set to false

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Metadata

Id: a5530bd7-225a-48f9-91bb-f40b04200165

Cloud Provider: Kubernetes

Platform: Kubernetes

Severity: High

Category: Access Control

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Description

When using kube-apiserver, the --service-account-lookup flag should be set to true. This rule flags containers (including initContainers) that run kube-apiserver and explicitly set --service-account-lookup=false. Disabling this lookup skips verification that a token’s service account still exists, which can allow tokens for deleted or revoked service accounts to be accepted; therefore the flag should be enabled (true).

Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: ["--service-account-lookup=true"]
  restartPolicy: OnFailure

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: []
  restartPolicy: OnFailure

Non-Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: ["--service-account-lookup=false"]
  restartPolicy: OnFailure