- A
The scanner's vulnerability signatures are outdated and still flagging the old behavior
An outdated signature database can cause the scanner to misinterpret server responses or fail to recognize that a patch has been applied, resulting in a false positive.
- B
The scanner's plugin for Heartbleed was misconfigured and sent malformed packets
Why wrong: While misconfiguration could cause errors, it is less likely to produce a high-confidence alert for a specific vulnerability without a degree of valid detection logic.
- C
The server returned a generic error message that the scanner misinterpreted as a sign of the vulnerability
Why wrong: Generic error messages are not typically used as indicators for Heartbleed; the scanner specifically checks for memory leak responses.
- D
The scanner's network connection was intermittent, causing incomplete responses that were incorrectly flagged
Why wrong: Network issues typically cause scan failures or timeouts, not high-confidence false positives for a specific vulnerability.
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 runs a vulnerability scanner against a web server and receives a high-confidence alert that the server is vulnerable to Heartbleed (CVE-2014-0160). The tester manually verifies using an OpenSSL command and finds that the server is patched. Which of the following is the most likely cause of this false positive?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The scanner's vulnerability signatures are outdated and still flagging the old behavior
Option A is correct because outdated vulnerability signatures are the most common cause of false positives in vulnerability scanning. The scanner's signature database likely still contains the original detection logic for Heartbleed (e.g., checking for a specific TLS heartbeat response length or pattern), which the patched server no longer exhibits. When the tester manually verified with an OpenSSL command (e.g., `openssl s_client -connect target:443 -tlsextdebug`), the patched server correctly handled the heartbeat request, confirming the scanner's alert was based on stale signatures.
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 scanner's vulnerability signatures are outdated and still flagging the old behavior
Why this is correct
An outdated signature database can cause the scanner to misinterpret server responses or fail to recognize that a patch has been applied, resulting in a false positive.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The scanner's plugin for Heartbleed was misconfigured and sent malformed packets
Why it's wrong here
While misconfiguration could cause errors, it is less likely to produce a high-confidence alert for a specific vulnerability without a degree of valid detection logic.
- ✗
The server returned a generic error message that the scanner misinterpreted as a sign of the vulnerability
Why it's wrong here
Generic error messages are not typically used as indicators for Heartbleed; the scanner specifically checks for memory leak responses.
- ✗
The scanner's network connection was intermittent, causing incomplete responses that were incorrectly flagged
Why it's wrong here
Network issues typically cause scan failures or timeouts, not high-confidence false positives for a specific vulnerability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume a false positive always results from network issues or misconfiguration, rather than recognizing that outdated scanner signatures are the primary cause when a manual test contradicts an automated scan.
Detailed technical explanation
How to think about this question
Heartbleed (CVE-2014-0160) exploits a missing bounds check in OpenSSL's TLS heartbeat extension, allowing an attacker to read up to 64KB of server memory. A patched server correctly validates the heartbeat request's payload length and returns only the requested data, while an unpatched server echoes back extra memory contents. Vulnerability scanners detect this by sending a heartbeat request with a small payload but a large declared length, then checking if the response exceeds the expected size—a signature that must be updated when patches change server behavior.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Information Gathering and Vulnerability Scanning — study guide chapter
Learn the concepts, then practise the questions
- →
Information Gathering and Vulnerability Scanning practice questions
Targeted practice on this topic area only
- →
All PT0-002 questions
509 questions across all exam domains
- →
CompTIA PenTest+ PT0-002 study guide
Full concept coverage aligned to exam objectives
- →
PT0-002 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PT0-002 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Planning and Scoping practice questions
Practise PT0-002 questions linked to Planning and Scoping.
Information Gathering and Vulnerability Scanning practice questions
Practise PT0-002 questions linked to Information Gathering and Vulnerability Scanning.
Attacks and Exploits practice questions
Practise PT0-002 questions linked to Attacks and Exploits.
Reporting and Communication practice questions
Practise PT0-002 questions linked to Reporting and Communication.
Tools and Code Analysis practice questions
Practise PT0-002 questions linked to Tools and Code Analysis.
PT0-002 fundamentals practice questions
Practise PT0-002 questions linked to PT0-002 fundamentals.
PT0-002 scenario practice questions
Practise PT0-002 questions linked to PT0-002 scenario.
PT0-002 troubleshooting practice questions
Practise PT0-002 questions linked to PT0-002 troubleshooting.
Practice this exam
Start a free PT0-002 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PT0-002 question test?
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 scanner's vulnerability signatures are outdated and still flagging the old behavior — Option A is correct because outdated vulnerability signatures are the most common cause of false positives in vulnerability scanning. The scanner's signature database likely still contains the original detection logic for Heartbleed (e.g., checking for a specific TLS heartbeat response length or pattern), which the patched server no longer exhibits. When the tester manually verified with an OpenSSL command (e.g., `openssl s_client -connect target:443 -tlsextdebug`), the patched server correctly handled the heartbeat request, confirming the scanner's alert was based on stale signatures.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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 →
Last reviewed: Jun 11, 2026
This PT0-002 practice question is part of Courseiva's free CompTIA 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 PT0-002 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.