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k8s

Kubernetes and container exploitation: identity/RBAC, secrets, kubelet/etcd, managed-cloud workload identities, container-to-node escape including CVE-2026-31431 Copy Fail, and Kubernetes-native persistence. Use when already in a Pod/container or holding kubeconfig. Own the chain to cluster-admin, node root, or a usable cloud identity. Operator chooses next modules. Endpoint blocks after OS execution hand off to /edr-bypass then return.

The English summary is being prepared. Showing the original description.

Works withKubernetes
See how to install

Files included (7)

  • SKILL.md5.1 KB
  • references/cloud-identity.md1.8 KB
  • references/container-escape.md4.5 KB
  • references/k8s-persistence.md3.8 KB
  • references/k8s-tools.md1.8 KB
  • references/rbac-abuse.md3.1 KB
  • references/vulnerability-intelligence.md675 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

/k8s — Kubernetes / Container 攻击

scope: 已在 Pod/Container 内或已有 Kubernetes API 凭据,打到 cluster-admin / node root / 可用云身份。K8s-native 持久化留本模块。▸ 云身份默认不要 /cloud-attack。候选只认 ~/.claude/skills/shared/modules.yaml(modules.py tail)。

本模块是红队攻击模块。RBAC / badPods / 逃逸 / Copy Fail 门控满足就打。Admission/RBAC 拒绝不是 EDR。


开局与收尾

开局第一件事:Read ./notes.md。没有则 python ~/.claude/skills/bin/notes.py init。只按已拿下/凭据继续。 走到哪条链,才 Read 一份 references/<file>.md。禁止开局全读、禁止凭记忆写 payload。 监听 / sudo / 输密码 / Permission denied:立刻停,说明等操作者做什么,等回报。不要假装已成功。 收尾:

  1. 追加 ./notes.md
  2. python ~/.claude/skills/bin/modules.py tail <本模块名> Read 备用:~/.claude/skills/shared/modules.yaml 禁止 ./modules.yaml 和 python ../bin/...
  3. 优先 default_next;never_default 不得当作默认(操作者点名除外)
  4. 名册外的名字不许建议
  5. 停。等操作者选 /模块 或 /clear /edr-bypass 半条链未完:打通后回本模块,不要 /clear。

0. 成功条件

Pod / kubeconfig
        ↓
身份 + can-i
        ↓
当前选中的 K8s 链(RBAC / Secret / 逃逸 / 云身份 / 平台持久化)
        ↓
cluster-admin 或 node root 或可验云身份
        ↓
/k8s COMPLETE

不算: 只 kubectl get pods、只 KubeHound 出图、只看到 SA token。


0.4 CVE

先拆 精确组件版本(kubelet / runtime / kernel / CNI),再 Read ../shared/cve-enrichment.md。不要搜 “Kubernetes” dump 全部洞。Managed 看厂商 backport。

kubectl get nodes -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.nodeInfo.kubeletVersion}{"\t"}{.status.nodeInfo.containerRuntimeVersion}{"\t"}{.status.nodeInfo.kernelVersion}{"\n"}{end}'
uname -r

0.5 EDR

RBAC / Admission / PSA / seccomp / OPA = 本模块。
只有 container/node 已经在 OS 执行 被 workload EDR 杀 → /edr-bypass → 回 /k8s 把链打完。

kubectl exec Forbidden、privileged 被 Admission 拒 = 不是 EDR。


1. 决策树

cat token/namespace + kubectl auth whoami + can-i --list
        ↓
A. 能 create pods/controllers 或 bind RBAC
      → Read references/rbac-abuse.md → 打到更高身份或 node
B. 能 get secrets / create token
      → 本模块取证、换成可用身份,再回到 A 或云身份
C. privileged / hostPath / docker.sock / hostPID / 危险 cap
      → Read references/container-escape.md → node root
D. 同节点共享镜像层 + kernel 门控
      → Copy Fail:Read container-escape.md(不要当通杀)
E. IRSA / Azure WI / GKE WI / ACK RRSA 环境变量或 projected token
      → Read references/cloud-identity.md → 校验 sts/az,候选 /cloud-recon
F. kubelet 匿名/nodes/proxy 或 etcd 暴露
      → Read references/k8s-tools.md 对应节
G. 要平台持久化
      → Read references/k8s-persistence.md
H. 以上都弱
      → 版本指纹 → cve-enrichment → 有公开 PoC 再打

同一条链打穿再换。不要按课表把 A–H 全跑一遍。


2. 静默身份(本 SKILL 仅保留这组)

SA=/var/run/secrets/kubernetes.io/serviceaccount
cat "$SA/namespace" 2>/dev/null
kubectl auth whoami 2>/dev/null
kubectl auth can-i --list
kubectl config current-context

现代 projected token 会过期,不要当永久 Secret。更多客户端/图 → 需要时再 Read references/k8s-tools.md(含 KubeHound)。

list 被拒就逐项 can-i,不要停。


3. 分支(命令在对应 reference)

RBAC / 建工作负载: 高价值不只是 pods/create(exec、ephemeral、secrets、token、webhook、controller)。→ references/rbac-abuse.md

逃逸: socket / privileged / hostPath / hostPID / cap / kubelet cred / 版本门控 CVE。docker.sock 在这台 Linux上逃到 host 也可走 /privesc-linux(操作者选)。集群内跨 Pod → 本模块。→ references/container-escape.md

云身份: token ≠ admin。校验后再候选 /cloud-recon,不要在这里做 IAM 提权。→ references/cloud-identity.md

持久化: SA+binding、DaemonSet、Admission Webhook。SSH/cron/C2 → /post。→ references/k8s-persistence.md


4. 完成后

身份 / 是否 cluster-admin / 是否 node root
云身份线索:
RESTORE: 删的 Pod/binding/webhook

写入 ./notes.md。候选只按「开局与收尾」跑 python ~/.claude/skills/bin/modules.py tail。

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