Ensure that default service accounts are not actively used.

Méthode de vérification

Méthode d'audit: Commande shell

sa=$(kubectl get serviceaccounts -A -o go-template='{{range .items}}{{if eq .metadata.name "default"}}{{.metadata.namespace}} {{.automountServiceAccountToken}}{{"\n"}}{{end}}{{end}}') || exit 1
rb=$(kubectl get rolebindings,clusterrolebindings -A -o go-template='{{range .items}}{{$b:=.metadata.name}}{{$bn:=.metadata.namespace}}{{range .subjects}}{{if eq .kind "ServiceAccount"}}{{if eq .name "default"}}{{if .namespace}}{{.namespace}}{{else}}{{$bn}}{{end}} {{$b}}{{"\n"}}{{end}}{{end}}{{end}}{{end}}') || exit 1
bad=$(printf '%s\n' "$sa" | awk -v ex='^(kube-system|kube-public|kube-node-lease)$' 'NF && $1 !~ ex && $2!="false" {print "automount: " $1}')
bad2=$(printf '%s\n' "$rb" | awk -v ex='^(kube-system|kube-public|kube-node-lease)$' 'NF && $1 !~ ex {print "binding: " $0}')
if [ -z "$bad$bad2" ]; then echo compliant; else printf '%s\n%s\n' "$bad" "$bad2" | grep . | head -n 25; fi

Sortie attendue

compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Create dedicated service accounts for workloads that need Kubernetes API access or OKE workload identity, and update those workloads to explicitly set serviceAccountName rather than relying on the namespace default service account. For workloads that do not need Kubernetes API access, disable service account token auto mounting and avoid using the default service account as the active workload identity. Also review the default service account in each namespace and ensure it is not bound to unnecessary RBAC permissions. Modify the default service account in each application namespace to set: automountServiceAccountToken: false Then validate workload manifests, because a Pod automountServiceAccountToken setting can override the service account setting, and workloads that actually need Kubernetes API access must use an explicitly assigned service account instead of inheriting default.

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

tmaegis scan --target oke