Competition Linux Credential Pivot
Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.
Use this skill when the decisive edge is Linux credential material and where that material is accepted.
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Quick Start
- Separate credential storage from accepted privilege.
- Record user, process, namespace, socket, key file, and service trust boundary before conclusions.
- Keep artifact recovery, replay path, and resulting capability in one chain.
- Distinguish local escalation from lateral host pivot.
- Reproduce one minimal artifact-to-accepted-access path.
Workflow
1. Map Credential And Trust Artifacts
- Record SSH keys, agent sockets, kubeconfigs, cloud tokens, service-account secrets, env vars, config files, and process memory clues.
- Note sudoers rules, capabilities, setuid binaries, systemd unit context, and namespace boundaries.
- Keep each artifact tied to owner, scope, and expected accepting service.
2. Prove Replay And Pivot
- Show where key, token, socket, or secret is accepted: SSH, API, Unix socket, container runtime, or control-plane endpoint.
- Record host target, protocol, principal, and resulting session or privilege.
- Distinguish authentication success from useful capability gain.
3. Reduce To Decisive Linux Pivot Chain
- Compress to: recovered artifact -> accepted replay path -> pivot host or privilege transition -> resulting capability.
- State whether root cause is weak key handling, token leakage, socket trust, sudo or capability abuse, or namespace crossover.
- If the chain pivots into kernel exploit boundaries, hand off to kernel container escape skill.
Read This Reference
- Load
references/linux-credential-pivot.md for artifact checklists, replay matrix, and evidence packaging.
What To Preserve
- Artifact path, owner, scope, accepting service, and resulting principal
- Exact pivot order with protocol and target host or namespace
- One minimal replayable chain proving capability gain
