KCSA Kubernetes Threat Model Practice Question
An adversary successfully compromises a workload and extracts the default service account token. By default, what permission level does this unconfigured service account token possess in modern Kubernetes clusters?
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
✓
Zero explicit RBAC permissions (cannot query or modify cluster resources)
In Kubernetes 1.22+, automountServiceAccountToken defaults to true unless disabled, but default service accounts have virtually no RBAC permissions unless explicitly bound via ClusterRoleBinding or RoleBinding.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Read-only access to all Secrets and ConfigMaps cluster-wide
Why it's wrong here
Default service accounts cannot read secrets or configmaps outside of API discovery calls.
- ✗
Full administrative rights restricted strictly to its own namespace
Why it's wrong here
Default service accounts do not receive admin rights within their own namespace by default either.
- ✓
Zero explicit RBAC permissions (cannot query or modify cluster resources)
Why this is correct
Modern Kubernetes versions ensure default service accounts in custom namespaces have no automatic RBAC privileges, preventing immediate lateral movement.
- ✗
Cluster-admin permissions across all cluster namespaces
Why it's wrong here
Giving default service accounts cluster-admin privileges would violate the principle of least privilege and was never default behavior.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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.