The answer is a container using a hostPath volume that mounts the host’s /var/run/docker.sock, as this directly exposes the Docker daemon to the container, allowing an attacker to issue commands to the host as root. This breaks container isolation because the Docker socket is a Unix socket that grants full control over the host’s container runtime, enabling escape through container creation or command execution. On the Certified Ethical Hacker CEH exam, this tests your understanding of Kubernetes misconfigurations and privilege escalation paths, often appearing in scenario-based questions where you must identify which of several indicators points to a breakout. A common trap is confusing hostPath volumes that mount sensitive files like /etc/shadow with the Docker socket—only the socket provides direct daemon access. Memory tip: “Socket escape” rhymes with “pocket escape,” reminding you that the Docker socket is the pocket-sized key to the host.
CEH Practice Question: Advanced Topics: Wireless, Cloud, IoT, Cryptography
This CEH practice question tests your understanding of advanced topics: wireless, cloud, iot, cryptography. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 analyst is investigating a potential container escape in a Kubernetes cluster. Which THREE of the following are common indicators of a container escape?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A process running inside the container with CAP_SYS_ADMIN capability
Container escape often involves breaking out of the container's isolation by exploiting misconfigurations or vulnerabilities. These indicators are common.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
A process running inside the container with CAP_SYS_ADMIN capability
Why this is correct
Correct: CAP_SYS_ADMIN grants many privileges that can be used to escape.
Related concept
Authentication checks who the user is.
✓
The container is running in privileged mode
Why this is correct
Correct: Privileged containers have full access to the host.
Related concept
Authentication checks who the user is.
✓
The container is using a hostPath volume that mounts the host's /var/run/docker.sock
Why this is correct
Correct: Mounting docker.sock allows the container to control the host's Docker daemon.
Related concept
Authentication checks who the user is.
✗
The container has a read-only root filesystem
Why it's wrong here
Read-only filesystem reduces risk, not an indicator of escape.
✗
The container is running as a non-root user
Why it's wrong here
Non-root user is a security best practice, not an indicator of escape.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CEH questions on access control and AAA configuration.
Advanced Topics: Wireless, Cloud, IoT, Cryptography — This question tests Advanced Topics: Wireless, Cloud, IoT, Cryptography — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: A process running inside the container with CAP_SYS_ADMIN capability — Container escape often involves breaking out of the container's isolation by exploiting misconfigurations or vulnerabilities. These indicators are common.
What should I do if I get this CEH question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CEH questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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