offensive-container-escape SKILL.md skillA
offensive-container-escape from snailsploit/claude-red is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add snailsploit/claude-red/offensive-container-escape@git:20260825.8cffe5dPins git:20260825.8cffe5d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- snailsploit/claude-red
- Path
Skills/container/offensive-container-escape/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260825.8cffe5d, committed Aug 25, 2026
- Size
- 21,739 bytes
- Repository stars
- 10,442
- License
- MIT
Container escape and breakout techniques targeting Docker, containerd, and Podman runtimes. Covers privileged container breakout via host filesystem mount and nsenter, Docker socket abuse through /var/run/docker.sock, Linux capability exploitation including CAP_SYS_ADMIN, CAP_SYS_PTRACE, and CAP_NET_ADMIN, cgroup v1 notify_on_release escape, runc CVEs such as CVE-2019-5736 and CVE-2024-21626 Leaky Vessels, kernel exploits from within containers, and Dockerfile misconfigurations like…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Container Escape and Breakout You have a shell inside a container. Your objective is to break out to the underlying host operating system. Container isolation relies on Linux namespaces, cgroups, seccomp profiles, AppArmor/SELinux, and dropped capabilities. Every misconfiguration in these layers is an escape vector. This skill walks you through systematic enumeration, exploitation of common misconfigurations, abuse of exposed runtime sockets, capability-based escapes, cgroup breakouts, and known CVEs against container runtimes. ## Quick Workflow 1. Confirm you are inside a container (check for `.dockerenv`, cgroup entries, PID 1 process). 2. Enumerate capabilities, mounts, namespaces, and sockets with automated tools. 3. Identify the escape vector: privileged mode, socket exposure, dangerous capabilities, cgroup misconfiguration, or vulnerable runtime. 4. Execute the breakout technique matching the vector. 5. Validate host access by reading `/etc/hostname`, checking PID namespace, or writing to host filesystem. 6. Pivot from host access to lateral movement across the cluster or infrastructure. --- ## Phase 1: Container Detection and Enumeration …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-container-escape@sha256:0646139103a2be51The line at the top of this page pins the label git:20260825.8cffe5d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jv6iydhycbpgg5wz)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (21739 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
snailsploit/claude-red · 10,442 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jv6iydhycbpgg5wz GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-container-escape GET https://markdownregistry.com/api/v1/blob/0646139103a2be51f4f6875e1bdf53cd00c23e259ee47e0262dc2fd0c38cb4fc
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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