The correct answer is Server-Side Request Forgery (SSRF). This is because the IP address 169.254.169.254 is the well-known link-local address used by cloud providers like AWS for their instance metadata service; when a web application is tricked into making a request to this internal endpoint, it exposes sensitive data such as IAM role credentials. On the Certified Ethical Hacker CEH exam, this scenario tests your ability to recognize SSRF as a cloud-specific attack vector, often disguised in logs as a simple URL parameter—a common trap is confusing it with a direct client-side request or a local file inclusion. Remember that SSRF exploits the server’s trust in internal resources, not the client’s. For a quick memory tip, think “169.254 is SSRF’s favorite number” to recall that this private IP range is the attacker’s gateway to cloud metadata.
CEH Practice Question: Advanced Topics: Wireless, Cloud, IoT, Cryptography
This CEH practice question tests your understanding of advanced topics: wireless, cloud, iot, cryptography. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 observes the following log entry on a web server: 'GET /?url=http://169.254.169.254/latest/meta-data/ HTTP/1.1'. This request appears to originate from a compromised web application. Which cloud attack technique is being attempted?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Server-Side Request Forgery (SSRF)
The IP address 169.254.169.254 is the AWS instance metadata service endpoint. An attacker using a Server-Side Request Forgery (SSRF) vulnerability can force the server to request this URL and retrieve sensitive instance metadata, such as IAM credentials.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 this is correct
Correct. The request to the cloud metadata service is a classic SSRF attack to obtain instance credentials.
Related concept
Static NAT maps one inside address to one outside address.
✗
SQL Injection
Why it's wrong here
SQL injection targets database queries, not HTTP requests to internal services.
✗
Container escape
Why it's wrong here
Container escape involves breaking out of a container to the host, not SSRF.
✗
Cross-Site Scripting (XSS)
Why it's wrong here
XSS involves injecting client-side scripts, not server-side requests to metadata.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
Advanced Topics: Wireless, Cloud, IoT, Cryptography — This question tests Advanced Topics: Wireless, Cloud, IoT, Cryptography — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Server-Side Request Forgery (SSRF) — The IP address 169.254.169.254 is the AWS instance metadata service endpoint. An attacker using a Server-Side Request Forgery (SSRF) vulnerability can force the server to request this URL and retrieve sensitive instance metadata, such as IAM credentials.
What should I do if I get this CEH question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CEH NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A penetration tester is assessing the security of a cloud application and discovers that it is vulnerable to Server-Side Request Forgery (SSRF). Which TWO of the following are potential impacts of this vulnerability?
medium
A.Ability to perform a man-in-the-middle attack on the user's browser
✓ B.Access to cloud instance metadata (e.g., AWS IMDS)
C.Direct modification of DNS records
✓ D.Remote code execution on internal servers
E.Direct access to the database without authentication
Why B: SSRF can allow access to internal services (like metadata endpoints) and potentially lead to remote code execution if internal services are compromised.
Variation 2. In a cloud environment, an attacker exploits a vulnerability in a web application to make the server send requests to internal metadata endpoints (e.g., http://169.254.169.254/latest/meta-data/). This yields IAM temporary credentials. Which attack is this?
Why A: SSRF occurs when an application fetches user-controlled URLs without proper validation. The attacker used it to access cloud metadata endpoints (like AWS IMDS) to retrieve temporary credentials.
Variation 3. A penetration tester discovers that a cloud application is vulnerable to Server-Side Request Forgery (SSRF). Which of the following is a potential impact of this vulnerability?
hard
A.Cross-site scripting (XSS) in the browser
B.Remote code execution via command injection
✓ C.Access to cloud instance metadata
D.SQL injection in the database
Why C: SSRF allows the attacker to make requests from the server, potentially accessing internal services like metadata endpoints (e.g., http://169.254.169.254) that are not publicly accessible.
Last reviewed: Jun 21, 2026
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CEH practice question is part of Courseiva's free EC-Council 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 CEH exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.