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红队KubeCTL速查表:Kubernetes安全视角

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red-kube项目是一个专注于Kubernetes集群安全的工具,其设计理念是基于红队的视角,即攻击者可能的攻击手法和行为模式。Kubernetes是一个广泛使用的开源容器编排系统,用于自动化部署、扩展和管理容器化应用程序。由于其广泛的应用,Kubernetes的安全性显得尤为重要。在理解red-kube之前,我们首先需要了解几个相关的概念。 首先,kubectl是Kubernetes的命令行工具,通过它可以对Kubernetes集群进行配置和管理。开发者和运维人员经常使用kubectl来执行各种操作,如部署应用、查看日志、管理集群资源等。在安全领域,尤其是红队活动中,攻击者和渗透测试人员也可以使用kubectl来模拟攻击行为,寻找可能的入侵点和安全弱点。 其次,MITER ATT&CK(Adversarial Tactics, Techniques, and Common Knowledge)是一个全球性的知识库,它详细列出了攻击者在进行网络攻击时所使用的技术和策略。它为安全团队提供了检测、防御和分析攻击活动的框架。red-kube通过映射到MITER ATT&CK矩阵,帮助用户从攻击者的角度审视和理解在Kubernetes环境中可能遇到的攻击手法。 red-kube将命令分为主动和被动两类。被动命令通常用于搜集信息,以便更深入地了解集群的状态和配置,如查看资源使用情况、角色权限等,而不直接影响系统。主动命令则更进一步,可能涉及对系统的修改或破坏,如修改配置、触发特定的应用行为等,这类命令需要谨慎使用,以避免对业务造成不可预期的影响。 在实际使用red-kube之前,用户需要确保已经安装了kubectl,并且拥有对Kubernetes集群的管理权限。先决条件中提到的命令是在Ubuntu/Debian系统上安装kubectl的基本步骤。用户需要先更新系统软件包列表,然后安装必要的软件以支持HTTPS传输和GPG密钥管理,最后添加Kubernetes的APT软件源。 需要注意的是,red-kube是一个用于教育和测试目的的工具,它提供了一系列的命令和操作供用户在授权的、合法的环境下测试和提高Kubernetes集群的安全性。警告中明确指出,未经允许在他人管理的Kubernetes集群上使用red-kube命令是不恰当的行为,可能构成非法侵入或其他违法行为。 在使用red-kube过程中,用户应保持高度的道德标准,确保所有的操作都在授权的范围内,并且符合相应的法律法规。通过这种方式,red-kube能够帮助安全人员更好地理解和防御可能的网络攻击,从而提升整个Kubernetes集群的安全防御能力。

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--- kind: Namespace apiVersion: v1 metadata: name: kube-flannel labels: k8s-app: flannel pod-security.kubernetes.io/enforce: privileged --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: flannel name: flannel rules: - apiGroups: - "" resources: - pods verbs: - get - apiGroups: - "" resources: - nodes verbs: - get - list - watch - apiGroups: - "" resources: - nodes/status verbs: - patch --- kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: flannel name: flannel roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: flannel subjects: - kind: ServiceAccount name: flannel namespace: kube-flannel --- apiVersion: v1 kind: ServiceAccount metadata: labels: k8s-app: flannel name: flannel namespace: kube-flannel --- kind: ConfigMap apiVersion: v1 metadata: name: kube-flannel-cfg namespace: kube-flannel labels: tier: node k8s-app: flannel app: flannel data: cni-conf.json: | { "name": "cbr0", "cniVersion": "0.3.1", "plugins": [ { "type": "flannel", "delegate": { "hairpinMode": true, "isDefaultGateway": true } }, { "type": "portmap", "capabilities": { "portMappings": true } } ] } net-conf.json: | { "Network": "10.244.0.0/16", "EnableNFTables": false, "Backend": { "Type": "vxlan" } } --- apiVersion: apps/v1 kind: DaemonSet metadata: name: kube-flannel-ds namespace: kube-flannel labels: tier: node app: flannel k8s-app: flannel spec: selector: matchLabels: app: flannel template: metadata: labels: tier: node app: flannel spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: kubernetes.io/os operator: In values: - linux hostNetwork: true priorityClassName: system-node-critical tolerations: - operator: Exists effect: NoSchedule serviceAccountName: flannel initContainers: - name: install-cni-plugin image: ghcr.io/flannel-io/flannel-cni-plugin:v1.7.1-flannel1 command: - cp args: - -f - /flannel - /opt/cni/bin/flannel volumeMounts: - name: cni-plugin mountPath: /opt/cni/bin - name: install-cni image: ghcr.io/flannel-io/flannel:v0.27.0 command: - cp args: - -f - /etc/kube-flannel/cni-conf.json - /etc/cni/net.d/10-flannel.conflist volumeMounts: - name: cni mountPath: /etc/cni/net.d - name: flannel-cfg mountPath: /etc/kube-flannel/ containers: - name: kube-flannel image: ghcr.io/flannel-io/flannel:v0.27.0 command: - /opt/bin/flanneld args: - --ip-masq - --kube-subnet-mgr resources: requests: cpu: "100m" memory: "50Mi" securityContext: privileged: false capabilities: add: ["NET_ADMIN", "NET_RAW"] env: - name: POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: EVENT_QUEUE_DEPTH value: "5000" - name: CONT_WHEN_CACHE_NOT_READY value: "false" volumeMounts: - name: run mountPath: /run/flannel - name: flannel-cfg mountPath: /etc/kube-flannel/ - name: xtables-lock mountPath: /run/xtables.lock volumes: - name: run hostPath: path: /run/flannel - name: cni-plugin hostPath: path: /opt/cni/bin - name: cni hostPath: path: /etc/cni/net.d - name: flannel-cfg configMap: name: kube-flannel-cfg - name: xtables-lock hostPath: path: /run/xtables.lock type: FileOrCreate

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Name: calico-kube-controllers-658d97c59c-dwrjq Namespace: kube-system Priority: 2000000000 Priority Class Name: system-cluster-critical Service Account: calico-kube-controllers Node: node2/192.168.72.102 Start Time: Tue, 25 Mar 2025 22:47:10 +0800 Labels: k8s-app=calico-kube-controllers pod-template-hash=658d97c59c Annotations: <none> Status: Pending IP: IPs: <none> Controlled By: ReplicaSet/calico-kube-controllers-658d97c59c Containers: calico-kube-controllers: Container ID: Image: docker.io/calico/kube-controllers:v3.25.0 Image ID: Port: <none> Host Port: <none> State: Waiting Reason: ContainerCreating Ready: False Restart Count: 0 Liveness: exec [/usr/bin/check-status -l] delay=10s timeout=10s period=10s #success=1 #failure=6 Readiness: exec [/usr/bin/check-status -r] delay=0s timeout=1s period=10s #success=1 #failure=3 Environment: ENABLED_CONTROLLERS: node DATASTORE_TYPE: kubernetes Mounts: /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-wtxjf (ro) Conditions: Type Status Initialized True Ready False ContainersReady False PodScheduled True Volumes: kube-api-access-wtxjf: Type: Projected (a volume that contains injected data from multiple sources) TokenExpirationSeconds: 3607 ConfigMapName: kube-root-ca.crt ConfigMapOptional: <nil> DownwardAPI: true QoS Class: BestEffort Node-Selectors: kubernetes.io/os=linux Tolerations: CriticalAddonsOnly op=Exists node-role.kubernetes.io/control-plane:NoSchedul 我这个po不是flannel ??是不是跟flannel环境搞混了

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