The correct answer is container escape to the host. Mounting /var/run/docker.sock inside a container effectively hands the container full control over the host’s Docker daemon, allowing an attacker to issue commands like docker run -it --privileged --pid=host to spawn a new container with host-level access, thereby breaking out of the original container’s isolation. On the Certified Ethical Hacker CEH exam, this scenario tests your understanding of containerization risks and the principle of least privilege; a common trap is confusing this with a simple privilege escalation within the container itself, when the real danger is escaping to the host. Remember the memory tip: “Socket in the box unlocks the host’s locks”—if you see the Docker socket mounted, think immediate host compromise.
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 discovers that a containerized application running in a cloud environment can access the host's file system by mounting /var/run/docker.sock inside the container. Which type of attack does this configuration enable?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Container escape to the host
Mounting the Docker socket inside a container allows the container to communicate with the Docker daemon on the host, potentially allowing the attacker to create new containers, escape the container, and execute commands on the host.
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.
✗
Server-Side Request Forgery (SSRF)
Why it's wrong here
SSRF involves making the server send requests to internal resources, not container escape.
✗
Privilege escalation within the container only
Why it's wrong here
While privilege escalation may occur, the mount provides direct host access, not just internal escalation.
✓
Container escape to the host
Why this is correct
Correct. Access to the Docker socket allows full control over the host's Docker daemon, enabling container escape.
Related concept
Authentication checks who the user is.
✗
Denial-of-Service (DoS) attack against the container runtime
Why it's wrong here
The mount primarily enables control over the host, not a DoS.
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 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.
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: Container escape to the host — Mounting the Docker socket inside a container allows the container to communicate with the Docker daemon on the host, potentially allowing the attacker to create new containers, escape the container, and execute commands on the host.
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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