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CompTIA CS0-003 Practice Test 50

Question 490

An alert flags a vulnerable product based on a service banner that the vendor backported. What is the MOST appropriate analyst action based on the evidence?

  1. Preserve evidence and escalate validation instead of dismissing the result on assertion.
  2. Validate vendor-fixed build metadata and close a false positive with documented evidence.
  3. Confirm the running image digest and close only after validating the false positive.
  4. Mark coverage incomplete and repeat with authorized access rather than claiming a true negative.

Explanation

Correct Answer

B:

Corrected software may retain old protocol banners. Close proven backport false positive.

Incorrect Answers

A:

Strong technical evidence outweighs unsupported informal assurance. It would uphold confirmed vulnerability against denial, but it would not close proven backport false positive.

C:

Accurate deployed artifact attribution is required to dismiss a finding. That is relevant to true-positive and false-positive analysis, not to close proven backport false positive.

D:

Incomplete scans can produce false negatives. It would recognize false negative from denied authenticated check, but it would not close proven backport false positive.

Question 491

A critical vendor advisory has no assigned CVE yet but identifies an affected exploited build. Which next step is MOST defensible for the security team?

  1. Reopen the risk assessment and revise compensating controls immediately.
  2. Coordinate forensic capture and response priorities before modifying the compromised system.
  3. Track the vendor identifier and affected build rather than waiting for CVE assignment.
  4. Validate isolation and plan controlled permanent remediation after service stability.

Explanation

Correct Answer

C:

CVE numbering is not a prerequisite for risk treatment. Remediate advisory before CVE publication.

Incorrect Answers

A:

New exploit capability changes residual risk even without a new CVE. It could help reassess controls after mitigation bypass, but it would not remediate advisory before CVE publication.

B:

Unplanned patching can destroy incident evidence or disrupt containment. That is relevant to exploit lifecycle and zero-day, not to remediate advisory before CVE publication.

D:

Temporary isolation can buy time without ignoring the vulnerability. It could help manage zero-day during critical outage, but it would not remediate advisory before CVE publication.

Question 492

An identity provider has an exposed admin feature but no users have its required privileged role. Which action BEST aligns with sound security operations?

  1. Include contractor credential compromise and VPN access in likelihood assessment.
  2. Score availability consequences for the kiosk service realistically and schedule hardening.
  3. Prioritize the combined exploit chain rather than rating each weakness in isolation.
  4. Validate role assignments and potential escalation paths before claiming immediate exploitability.

Explanation

Correct Answer

D:

Authorization prerequisites can make a route difficult without other footholds. Assess required privileged role in exploit chain.

Incorrect Answers

A:

Private reachability may still be broad under business trust relationships. That is relevant to attack path and privilege chains, not to assess required privileged role in exploit chain.

B:

Technical remote reboot capability may still have bounded business impact. It would contextualize low-criticality remote reboot flaw, but it would not assess required privileged role in exploit chain.

C:

Chained low-risk issues can unlock high-impact privilege paths. It could help evaluate chained vulnerability impact, but it would not assess required privileged role in exploit chain.

Question 493

A vulnerable process controller supports safety-critical shutdown operations. Which response BEST addresses the security problem described?

  1. Coordinate urgent mitigations with OT safety owners before intrusive patch attempts.
  2. Keep remediation scheduled but distinguish lower business impact from mission-critical assets.
  3. Elevate integrity impact even if confidentiality impact appears low.
  4. Prioritize confidentiality impact and third-party reach in the remediation queue.

Explanation

Correct Answer

A:

Service integrity and availability risks are severe, but unsafe changes can harm operations. Prioritize safety-critical OT vulnerability safely.

Incorrect Answers

B:

Business significance and recoverability influence remediation urgency. It could help contextualize low-impact kiosk exposure, but it would not prioritize safety-critical OT vulnerability safely.

C:

Unauthorized financial modification can be as damaging as data theft. That is relevant to business criticality and data types, not to prioritize safety-critical OT vulnerability safely.

D:

Sensitive PII and vendor access increase breach consequences. It would prioritize HR portal with sensitive PII, but it would not prioritize safety-critical OT vulnerability safely.

Question 494

A known exploited vulnerability appears on a dormant retired appliance that remains on the network. Which investigative or response action BEST fits the evidence?

  1. Escalate remediation and containment because weaponization and reachability increased.
  2. Verify network reachability and remove or isolate the unneeded device urgently.
  3. Validate the vulnerability and evidence before displacing confirmed urgent remediation work.
  4. Apply approved isolation or compensating controls while monitoring vendor fixes and exploitation.

Explanation

Correct Answer

B:

Abandoned reachable infrastructure can remain an active attack path. Prioritize exploitable forgotten appliance.

Incorrect Answers

A:

Working exploitation code raises near-term attack likelihood. It could help increase priority after working public exploit, but it would not prioritize exploitable forgotten appliance.

C:

Unverified claims should not override known exploitability priorities. It would challenge speculative critical vulnerability claim, but it would not prioritize exploitable forgotten appliance.

D:

Zero-day exposure needs interim risk reduction even without a patch. It could help mitigate unpatched zero-day exposure, but it would not prioritize exploitable forgotten appliance.

Question 495

An exploit requires admin privileges already greater than the permissions it would gain. What is the MOST appropriate analyst action based on the evidence?

  1. Increase practical likelihood based on real user behavior despite user-interaction requirement.
  2. Verify disabled module state and adjust exploit likelihood without erasing the finding.
  3. Consider limited incremental impact while documenting the vulnerability.
  4. Evaluate the real number of eligible untrusted users and resulting privilege impact.

Explanation

Correct Answer

C:

A required privilege can make nominal escalation less meaningful in context. Evaluate exploit with already-high privileges.

Incorrect Answers

A:

Frequent normal interactions can satisfy an exploit prerequisite. That is relevant to exploit preconditions and local privilege, not to evaluate exploit with already-high privileges.

B:

Absent vulnerable functionality reduces reachable attack surface. It would contextualize disabled optional exploit path, but it would not evaluate exploit with already-high privileges.

D:

Authenticated prerequisites may be readily met on broadly shared hosts. That is relevant to exploit preconditions and local privilege, not to evaluate exploit with already-high privileges.

Question 496

A vulnerability backlog grows while scanners add more assets and remediation velocity holds steady. Which next step is MOST defensible for the security team?

  1. Measure time to validated closure and separately report overdue unverified findings.
  2. Escalate for timely reevaluation or renewed mitigation before expiration.
  3. Investigate root cause in build and configuration pipelines.
  4. Compare coverage, normalized findings per asset and verified resolution trend.

Explanation

Correct Answer

D:

Larger detection scope can inflate counts without equivalent deterioration in controls. Interpret backlog growth versus scanning expansion.

Incorrect Answers

A:

Administrative closure is not equivalent to confirmed risk reduction. It would measure verified vulnerability remediation time, but it would not interpret backlog growth versus scanning expansion.

B:

Exceptions cannot silently become permanent avoidance of accountability. It could help enforce expiring vulnerability exception, but it would not interpret backlog growth versus scanning expansion.

C:

Reappearance suggests a systemic process defect rather than independent isolated tickets. That is relevant to vulnerability aging and exceptions, not to interpret backlog growth versus scanning expansion.

Question 497

A high-risk scan says a host is clean, but the scanning credential failed for protected package directories. Which action BEST aligns with sound security operations?

  1. Mark coverage incomplete and repeat with authorized access rather than claiming a true negative.
  2. Validate vendor-fixed build metadata and close a false positive with documented evidence.
  3. Preserve evidence and escalate validation instead of dismissing the result on assertion.
  4. Confirm the running image digest and close only after validating the false positive.

Explanation

Correct Answer

A:

Incomplete scans can produce false negatives. Recognize false negative from denied authenticated check.

Incorrect Answers

B:

Corrected software may retain old protocol banners. That is relevant to true-positive and false-positive analysis, not to recognize false negative from denied authenticated check.

C:

Strong technical evidence outweighs unsupported informal assurance. It would uphold confirmed vulnerability against denial, but it would not recognize false negative from denied authenticated check.

D:

Accurate deployed artifact attribution is required to dismiss a finding. It could help validate absent library false positive, but it would not recognize false negative from denied authenticated check.

Question 498

A dashboard uses raw CVSS scores as a substitute for financial-loss estimation. Which response BEST addresses the security problem described?

  1. Examine the attack vector evidence and correct the score inputs.
  2. Add business impact and likelihood context when discussing enterprise risk.
  3. Reassess the exception and obtain renewed risk-owner decision.
  4. Include actual dependency and privilege paths when assessing exposure.

Explanation

Correct Answer

B:

Technical severity scores are not direct monetary loss estimates. Separate CVSS from financial risk calculation.

Incorrect Answers

A:

Access requirements are fundamental to technical severity. That is relevant to scoring model limitations, not to separate CVSS from financial risk calculation.

C:

Risk acceptance must be revisited when likelihood changes materially. It could help reopen risk acceptance after exploit changes, but it would not separate CVSS from financial risk calculation.

D:

Network labels alone do not capture all trust relationships. That is relevant to scoring model limitations, not to separate CVSS from financial risk calculation.

Question 499

A risk register records an accepted vulnerability but new attack tooling makes it exploitable remotely. Which investigative or response action BEST fits the evidence?

  1. Add business impact and likelihood context when discussing enterprise risk.
  2. Include actual dependency and privilege paths when assessing exposure.
  3. Reassess the exception and obtain renewed risk-owner decision.
  4. Examine the attack vector evidence and correct the score inputs.

Explanation

Correct Answer

C:

Risk acceptance must be revisited when likelihood changes materially. Reopen risk acceptance after exploit changes.

Incorrect Answers

A:

Technical severity scores are not direct monetary loss estimates. It would separate CVSS from financial risk calculation, but it would not reopen risk acceptance after exploit changes.

B:

Network labels alone do not capture all trust relationships. It could help uncover hidden production risk through shared storage, but it would not reopen risk acceptance after exploit changes.

D:

Access requirements are fundamental to technical severity. It would validate attack vector rating accuracy, but it would not reopen risk acceptance after exploit changes.

Question 500

A low-priority bug has recurred on each monthly build after a permanent fix was claimed. What is the MOST appropriate analyst action based on the evidence?

  1. Compare coverage, normalized findings per asset and verified resolution trend.
  2. Measure time to validated closure and separately report overdue unverified findings.
  3. Escalate for timely reevaluation or renewed mitigation before expiration.
  4. Investigate root cause in build and configuration pipelines.

Explanation

Correct Answer

D:

Reappearance suggests a systemic process defect rather than independent isolated tickets. Identify recurring vulnerability reintroduction.

Incorrect Answers

A:

Larger detection scope can inflate counts without equivalent deterioration in controls. It could help interpret backlog growth versus scanning expansion, but it would not identify recurring vulnerability reintroduction.

B:

Administrative closure is not equivalent to confirmed risk reduction. That is relevant to vulnerability aging and exceptions, not to identify recurring vulnerability reintroduction.

C:

Exceptions cannot silently become permanent avoidance of accountability. It would enforce expiring vulnerability exception, but it would not identify recurring vulnerability reintroduction.


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