The correct answer is that an attacker tricks the server into making requests to internal or external resources, because a Server-Side Request Forgery (SSRF) attack exploits a vulnerable server’s ability to initiate outbound HTTP requests on behalf of the attacker. This allows the attacker to bypass network segmentation and access sensitive internal systems—such as cloud metadata endpoints at 169.254.169.254 or internal databases on RFC 1918 addresses—by using the server as a proxy. On the Certified Ethical Hacker CEH exam, SSRF questions often test your ability to distinguish it from cross-site request forgery (CSRF) and to recognize that the attack targets server-side logic, not client browsers. A common trap is confusing SSRF with a simple redirect; remember that in SSRF, the server itself is the weapon, not the victim. Memory tip: think “Server as Proxy” to recall that the server fetches resources the attacker cannot reach directly.
CEH Web Application and Injection Attacks Practice Question
This CEH practice question tests your understanding of web application and injection attacks. 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.
Which of the following best describes a Server-Side Request Forgery (SSRF) attack?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
An attacker tricks the server into making requests to internal or external resources
A Server-Side Request Forgery (SSRF) attack occurs when an attacker manipulates a vulnerable server into making HTTP requests to arbitrary destinations, often bypassing network segmentation to access internal resources (e.g., 127.0.0.1, RFC 1918 addresses) or external services. The server acts as a proxy, allowing the attacker to interact with systems that are not directly reachable, such as cloud metadata endpoints (e.g., AWS http://169.254.169.254/latest/meta-data/) or internal databases.
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.
✓
An attacker tricks the server into making requests to internal or external resources
Why this is correct
SSRF involves the server making requests on behalf of the attacker, often to internal systems.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
An attacker sends a malicious script that executes in a user's browser
Why it's wrong here
That is XSS.
✗
An attacker forges HTTP requests to perform actions on behalf of an authenticated user
Why it's wrong here
That is CSRF.
✗
An attacker injects SQL commands into a database query
Why it's wrong here
That is SQL injection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse SSRF with CSRF (Option C) because both involve forged requests, but SSRF targets the server's ability to make requests to internal resources, while CSRF targets the user's browser to perform actions on their behalf.
Detailed technical explanation
How to think about this question
Under the hood, SSRF exploits server-side functionality that fetches URLs (e.g., file_get_contents() in PHP, curl in Python, or HttpClient in Java) without proper validation of the scheme, host, or port. A subtle behavior is that even if the server blocks private IP ranges, attackers can bypass restrictions using DNS rebinding, redirects, or alternative representations like 0.0.0.0, [::1], or decimal IP notation (e.g., 2130706433 for 127.0.0.1). In real-world scenarios, SSRF is often used to access cloud instance metadata services (e.g., AWS, GCP, Azure) to steal IAM credentials or secrets.
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 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.
Web Application and Injection Attacks — This question tests Web Application and Injection Attacks — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: An attacker tricks the server into making requests to internal or external resources — A Server-Side Request Forgery (SSRF) attack occurs when an attacker manipulates a vulnerable server into making HTTP requests to arbitrary destinations, often bypassing network segmentation to access internal resources (e.g., 127.0.0.1, RFC 1918 addresses) or external services. The server acts as a proxy, allowing the attacker to interact with systems that are not directly reachable, such as cloud metadata endpoints (e.g., AWS http://169.254.169.254/latest/meta-data/) or internal databases.
What should I do if I get this CEH question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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