Escaping Containers to Host
Legal Notice: This skill is for authorized security testing and educational purposes only. Container breakout grants full host compromise. Only run these techniques against systems you own or have explicit written authorization to test. Unauthorized use is illegal and may violate computer fraud laws.
Overview
Container escape (MITRE ATT&CK T1611, Escape to Host) is the act of breaking the isolation boundary between a container and the host operating system, giving an attacker code execution in the host namespace — and, on Kubernetes, frequently a route to the entire node and then the cluster. Containers share the host kernel and rely on namespaces, cgroups, capabilities, seccomp, and LSMs (AppArmor/SELinux) for isolation. When any of these controls are weakened (a --privileged container, a mounted Docker socket, a hostPath mount of /, excess Linux capabilities such as CAP_SYS_ADMIN) or when a runtime contains a vulnerability, that boundary collapses.
This skill covers the four highest-impact, real-world escape primitives observed by Sysdig, Unit 42, and the runC maintainers:
- Misconfiguration escapes — privileged containers,…
