kube-bench
Go tool that checks Kubernetes clusters against the CIS Kubernetes Benchmark across managed and self-hosted distributions.
Technical Architecture & Overview
kube-bench is a Go tool from Aqua Security that checks whether a Kubernetes cluster is deployed according to the CIS Kubernetes Benchmark. It runs benchmark tests on master, node, etcd, and control plane components. It supports standard Kubernetes and managed distributions such as EKS, AKS, GKE, OpenShift, k3s, RKE, and RKE2.
Targeted Technical Use Cases
Validate Kubernetes cluster hardening against the CIS Kubernetes Benchmark during deployment, upgrades, and recurring compliance checks.
Evaluation & Trade-offs
Core Strengths
- +Implements the widely adopted CIS Kubernetes Benchmark.
- +Supports many Kubernetes distributions including EKS, AKS, GKE, and OpenShift.
- +Can run as a container, Kubernetes Job, or host binary.
Trade-Offs & Limitations
- -Read-only assessment tool, not an enforcement engine.
- -Must be run with appropriate permissions on the target cluster.
- -Does not replace continuous runtime protection or vulnerability scanning.
Defensive Security Application
Run kube-bench after cluster provisioning and on a schedule to find hardening gaps, then apply benchmark recommendations through configuration changes and admission controllers.
Frequently Asked Questions
What is kube-bench?→
kube-bench is a Go tool from Aqua Security that checks whether a Kubernetes cluster is deployed according to the CIS Kubernetes Benchmark. It runs benchmark tests on master, node, etcd, and control plane components. It supports standard Kubernetes and managed distributions such as EKS, AKS, GKE, OpenShift, k3s, RKE, and RKE2.
What is kube-bench used for?→
Validate Kubernetes cluster hardening against the CIS Kubernetes Benchmark during deployment, upgrades, and recurring compliance checks.
What are the strengths of kube-bench?→
- +Implements the widely adopted CIS Kubernetes Benchmark.
- +Supports many Kubernetes distributions including EKS, AKS, GKE, and OpenShift.
- +Can run as a container, Kubernetes Job, or host binary.
What are the limitations of kube-bench?→
- +Read-only assessment tool, not an enforcement engine.
- +Must be run with appropriate permissions on the target cluster.
- +Does not replace continuous runtime protection or vulnerability scanning.
How is kube-bench used defensively?→
Run kube-bench after cluster provisioning and on a schedule to find hardening gaps, then apply benchmark recommendations through configuration changes and admission controllers.