- A
capabilities.drop: ["ALL"]
Why wrong: Dropping all capabilities removes existing capabilities but does not prevent escalation.
- B
privileged: false
Why wrong: This prevents privileged mode but does not block privilege escalation.
- C
allowPrivilegeEscalation: false
Correct. This prevents privilege escalation.
- D
runAsNonRoot: true
Why wrong: This prevents root user but does not block escalation.
Question 752 of 997
Preventing Capability Escalation with allowPrivilegeEscalation | Certified Kubernetes Security Specialist Explained
This CKS practice question tests your understanding of minimize microservice vulnerabilities. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security team wants to enforce that containers in a specific namespace cannot gain new capabilities. Which Pod security context field is used to achieve this?
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
✓
allowPrivilegeEscalation: false
Option C is correct because `allowPrivilegeEscalation: false` directly controls whether a process can gain more privileges than its parent, which is the mechanism by which containers acquire new capabilities (e.g., via `setuid` binaries or `file capabilities`). Setting this to `false` prevents privilege escalation within the container, effectively blocking the acquisition of new capabilities beyond those initially granted. This field is defined in the Pod Security Context and is a key control for minimizing microservice vulnerabilities.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
capabilities.drop: ["ALL"]
Why it's wrong here
Dropping all capabilities removes existing capabilities but does not prevent escalation.
- ✗
privileged: false
Why it's wrong here
This prevents privileged mode but does not block privilege escalation.
- ✓
allowPrivilegeEscalation: false
Why this is correct
Correct. This prevents privilege escalation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
runAsNonRoot: true
Why it's wrong here
This prevents root user but does not block escalation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates often choose capabilities.drop: ['ALL'] because it removes all capabilities, but the question asks for preventing containers from gaining new capabilities. allowPrivilegeEscalation: false prevents privilege escalation at runtime, which is the mechanism for gaining new capabilities beyond those initially granted.
Detailed technical explanation
How to think about this question
Under the hood, `allowPrivilegeEscalation` maps to the `no_new_privs` Linux kernel flag, which prevents the process from gaining new privileges via `setuid`, `setgid`, or file capabilities (as defined in `capabilities(7)`). This flag is enforced at the kernel level and is independent of the initial capability set; even if a container has `CAP_NET_RAW`, setting `allowPrivilegeEscalation: false` ensures it cannot escalate to `CAP_NET_ADMIN` through a vulnerable binary. In real-world scenarios, this is critical for multi-tenant clusters where a compromised container could otherwise leverage a `setuid` binary to gain additional capabilities and escape to the host.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Minimize Microservice Vulnerabilities — study guide chapter
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FAQ
Questions learners often ask
What does this CKS question test?
Minimize Microservice Vulnerabilities — This question tests Minimize Microservice Vulnerabilities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: allowPrivilegeEscalation: false — Option C is correct because `allowPrivilegeEscalation: false` directly controls whether a process can gain more privileges than its parent, which is the mechanism by which containers acquire new capabilities (e.g., via `setuid` binaries or `file capabilities`). Setting this to `false` prevents privilege escalation within the container, effectively blocking the acquisition of new capabilities beyond those initially granted. This field is defined in the Pod Security Context and is a key control for minimizing microservice vulnerabilities.
What should I do if I get this CKS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This CKS practice question is part of Courseiva's free CNCF 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 CKS exam.
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