The answer is that the target is vulnerable to Apache Struts2 remote code execution. This is correct because the Nmap http-vuln-cve2017-5638 script specifically probes for CVE-2017-5638, a critical flaw in the Jakarta Multipart parser that allows attackers to execute arbitrary commands by sending a crafted Content-Type header. On the CompTIA PenTest+ PT0-002 exam, this finding tests your ability to interpret NSE script results and map them to known vulnerabilities, often appearing in scenario-based questions where you must identify the risk from a scan report. A common trap is confusing this with a simple web server misconfiguration or directory traversal, but the key is that this script targets remote code execution via Struts2’s parser. Memory tip: think “Struts2 + Content-Type = RCE,” and remember the year 2017 ties to the Equifax breach, making it a high-priority finding.
PT0-002 Practice Question: Information Gathering and Vulnerability Scanning
This PT0-002 practice question tests your understanding of information gathering and vulnerability scanning. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 penetration tester is performing a vulnerability scan on a target network. The tester uses Nmap with the default NSE scripts against a web server. The scan report shows several 'http-vuln-cve2017-5638' findings. What does this indicate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The target is vulnerable to Apache Struts2 remote code execution
The Nmap script 'http-vuln-cve2017-5638' specifically targets the Apache Struts2 remote code execution vulnerability (CVE-2017-5638). This vulnerability exists in the Jakarta Multipart parser used by Apache Struts2, allowing an attacker to execute arbitrary commands via crafted Content-Type headers. The presence of this finding in the scan report indicates the web server is running a vulnerable version of Apache Struts2.
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.
✓
The target is vulnerable to Apache Struts2 remote code execution
Why this is correct
The script specifically tests for the Struts2 vulnerability that allows unauthenticated remote code execution via Content-Type headers.
Related concept
Read the scenario before looking for a memorised answer.
✗
The target is vulnerable to the Heartbleed bug in OpenSSL
Why it's wrong here
Heartbleed is detected by the ssl-heartbleed NSE script, not http-vuln-cve2017-5638.
✗
The target is vulnerable to the Shellshock Bash vulnerability
Why it's wrong here
Shellshock is tested by http-shellshock NSE script, a different CVE.
✗
The target has a SQL injection vulnerability
Why it's wrong here
There is no specific CVE for generic SQL injection; this CVE is for Struts2 RCE.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the CVE number or the technology name, assuming any 'http-vuln-cve' script refers to a generic web vulnerability, when in fact each script is tied to a specific software and CVE, such as Apache Struts2 for CVE-2017-5638.
Detailed technical explanation
How to think about this question
CVE-2017-5638 exploits the Jakarta Multipart parser in Apache Struts2 versions 2.3.5 to 2.3.31 and 2.5 to 2.5.10 by injecting OGNL code through the Content-Type header. The Nmap script sends a crafted HTTP POST request with a malicious Content-Type value; if the server responds with a specific error message or executes a command, the vulnerability is confirmed. In real-world scenarios, this vulnerability was famously used in the Equifax data breach, highlighting the critical need for patching Struts2 frameworks.
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 security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PT0-002 question in full detail.
Information Gathering and Vulnerability Scanning — This question tests Information Gathering and Vulnerability Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The target is vulnerable to Apache Struts2 remote code execution — The Nmap script 'http-vuln-cve2017-5638' specifically targets the Apache Struts2 remote code execution vulnerability (CVE-2017-5638). This vulnerability exists in the Jakarta Multipart parser used by Apache Struts2, allowing an attacker to execute arbitrary commands via crafted Content-Type headers. The presence of this finding in the scan report indicates the web server is running a vulnerable version of Apache Struts2.
What should I do if I get this PT0-002 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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Question Discussion
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