Escape to Host (T1611)

Adversaries may break out of a container to gain access to the underlying host. This can allow an adversary access to other containerized resources from the host level or to the host itself. In principle, containerized resources should provide a clear separation of application functionality and be isolated from the host environment.(Citation: Docker Overview) There are multiple ways an adversary may escape to a host environment. Examples include creating a container configured to mount the host’s filesystem using the bind parameter, which allows the adversary to drop payloads and execute control utilities such as cron on the host, or utilizing a privileged container to run commands on the underlying host.(Citation: Docker Bind Mounts)(Citation: Trend Micro Privileged Container)(Citation: Intezer Doki July 20) Adversaries may also escape via Exploitation for Privilege Escalation, such as exploiting vulnerabilities in global symbolic links in order to access the root directory of a host machine.(Citation: Windows Server Containers Are Open) Gaining access to the host may provide the adversary with the opportunity to achieve follow-on objectives, such as establishing persistence, moving laterally within the environment, or setting up a command and control channel on the host.

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Is my Kubernetes pod protected against host mounting?


Escape Kubernetes Pod via host filesystem mounting.
Is my Docker daemon vulnerable to privilege escalation?


Privilege escalation through exposed Docker daemon.
Is my Docker container vulnerable to cgroup controller escapes?


Escape Docker container via cgroup controller.
Is my Docker container vulnerable to host filesystem mounting?


Escape Docker container by mounting host filesystem.
Is my Docker container vulnerable to a Docker socket escape?


Escape a Docker container that has the Docker socket mounted.