KCSA Kubernetes Threat Model Practice Question
A security team discovers that an application container running as root has successfully mounted the host's Docker socket (`/var/run/docker.sock`). What is the primary attack vector enabled by this misconfiguration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Container escape and full node takeover by orchestrating new sibling containers with host mounts
Access to the Docker socket allows a container to create sibling containers on the host, often mounting the host root filesystem (`/`) and achieving full node compromise.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bypassing Kubernetes NetworkPolicies across different worker nodes
Why it's wrong here
Docker socket access does not alter the CNI plugin's enforcement of Kubernetes NetworkPolicies.
- ✗
Direct modification of the etcd database state via local unix socket tunneling
Why it's wrong here
etcd uses its own data directory and client ports, not the Docker Unix socket.
- ✓
Container escape and full node takeover by orchestrating new sibling containers with host mounts
Why this is correct
The Docker socket is the API endpoint for the container engine; sending commands to it lets the container spawn arbitrary containers on the underlying host node.
- ✗
Automatic escalation of RBAC roles assigned to the API server
Why it's wrong here
Docker socket controls the container runtime engine, not the Kubernetes API server's RBAC authorizer.
About these practice questions
Courseiva writes every KCSA question from scratch — 320 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the KCSA exam.