KCSA Kubernetes Threat Model Practice Question
A security team is evaluating the attack surface of the Kubernetes control plane. They notice that the kubelet API port 10250 is accessible from the internal pod network without proper authorization checks if authentication defaults are misconfigured. What is the primary threat vector associated with an unauthenticated, accessible kubelet API?
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
✓
Execution of arbitrary commands inside running containers via the kubelet exec and run endpoints
An unauthenticated kubelet API allows attackers to run commands inside containers (via the exec/run APIs), read logs, and extract sensitive information from the node.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Execution of arbitrary commands inside running containers via the kubelet exec and run endpoints
Why this is correct
Correct. An exposed kubelet API permits executing commands in pods running on that node, bypassing API server RBAC.
- ✗
Direct modification of etcd key-value pairs stored on the master node
Why it's wrong here
Kubelet does not have direct access to etcd storage.
- ✗
Bypassing container image vulnerability scanners running in the CI/CD pipeline
Why it's wrong here
CI/CD vulnerability scanners operate independently of the kubelet API.
- ✗
Forcing the API server to issue new root certificates via TLS bootstrapping
Why it's wrong here
Certificate signing requests go through the API server, not the kubelet API.
About these practice questions
This KCSA question is part of Courseiva's 319-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.