Container & Kubernetes Escape Attacks: Hardening Cloud Infrastructure Against Kernel Breaches

Containers provide lightweight application deployment, but containers are not virtual machines. They share the host operating system's kernel. Misconfigurations in Docker runtimes or Kubernetes pod security standards can allow malicious actors to break out of a container and compromise the entire cluster host node.

Common Container Breakout Vectors

1. Privileged Containers (`--privileged` flag): Running containers with elevated capabilities grants direct access to host devices and memory.
2. Exposed Docker Socket (`/var/run/docker.sock`): Mounting the host Docker socket inside a container allows any user inside to launch new root containers on the host.
3. Kernel Vulnerabilities (Dirty Cow, OverlayFS exploits): Outdated host kernel versions enable unprivileged container processes to escalate privileges on the host node.

Hardening Kubernetes Infrastructure

Implement strict Pod Security Standards (Restricted Profile), enforce read-only root filesystems, utilize AppArmor / Seccomp profiles, and perform regular container image vulnerability scanning with SA Infotech.