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CompTIA CS0-003 Practice Test 49

Question 480

An internet host is patched but an exposed management credential remains weak. What is the MOST appropriate analyst action based on the evidence?

  1. Reevaluate compensating control effectiveness and prioritize the residual attack path.
  2. Verify every serving instance and load-balancer pool member before declaring fixed.
  3. Validate the disabled service and maintain monitored remediation plan.
  4. Track the credential misconfiguration as a separate residual risk.

Explanation

Correct Answer

D:

Removing a software flaw does not close unrelated authentication weaknesses. Distinguish patched CVE from residual credential risk.

Incorrect Answers

A:

Allowlist protection depends on trustworthiness of allowed sources. That is relevant to network isolation and compensating control, not to distinguish patched CVE from residual credential risk.

B:

Partial remediation leaves exploitable paths active. It would require complete pool vulnerability remediation, but it would not distinguish patched CVE from residual credential risk.

C:

Disabling vulnerable functionality may reduce current exploitability pending patch. It could help assess service-disabled risk control, but it would not distinguish patched CVE from residual credential risk.

Question 481

A vendor warns of active exploitation of one model, while inventory uses a similar but unaffected model. Which next step is MOST defensible for the security team?

  1. Confirm affected model/build identifiers before treating every product as vulnerable.
  2. Escalate validation and remediation because local adversary capability is demonstrated.
  3. Record uncertain exploit maturity and seek corroboration before changing severity based solely on rumor.
  4. Prioritize immediate containment and patching due to observed targeting.

Explanation

Correct Answer

A:

Exploitation alerts must be matched to actual deployed versions. Validate asset match for exploited advisory.

Incorrect Answers

B:

Observed nearby exploitation increases relevant likelihood. It could help prioritize vulnerability after local exploit observation, but it would not validate asset match for exploited advisory.

C:

Speculation and practical weaponization are not equivalent evidence. That is relevant to threat intelligence in vulnerability priority, not to validate asset match for exploited advisory.

D:

Attack activity against matching exposure raises near-term risk. It would elevate vulnerability under active targeting, but it would not validate asset match for exploited advisory.

Question 482

A kiosk flaw allows unauthenticated reboot but the kiosk controls no sensitive business workflow. 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

B:

Technical remote reboot capability may still have bounded business impact. Contextualize low-criticality remote reboot flaw.

Incorrect Answers

A:

Private reachability may still be broad under business trust relationships. It could help contextualize VPN-restricted vulnerable service, but it would not contextualize low-criticality remote reboot flaw.

C:

Chained low-risk issues can unlock high-impact privilege paths. It would evaluate chained vulnerability impact, but it would not contextualize low-criticality remote reboot flaw.

D:

Authorization prerequisites can make a route difficult without other footholds. It could help assess required privileged role in exploit chain, but it would not contextualize low-criticality remote reboot flaw.

Question 483

A privilege escalation requires an authenticated local user but affects a jump host with many contractors. Which response BEST addresses the security problem described?

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

Explanation

Correct Answer

C:

Authenticated prerequisites may be readily met on broadly shared hosts. Prioritize local escalation on shared jump host.

Incorrect Answers

A:

A required privilege can make nominal escalation less meaningful in context. That is relevant to exploit preconditions and local privilege, not to prioritize local escalation on shared jump host.

B:

Absent vulnerable functionality reduces reachable attack surface. It would contextualize disabled optional exploit path, but it would not prioritize local escalation on shared jump host.

D:

Frequent normal interactions can satisfy an exploit prerequisite. That is relevant to exploit preconditions and local privilege, not to prioritize local escalation on shared jump host.

Question 484

An automated risk dashboard assumes all discovered hosts carry the same importance. Which investigative or response action BEST fits the evidence?

  1. Assign explicit remediation owners and track dependent validation checkpoints.
  2. Coordinate risk mitigation and a controlled maintenance decision with service owners.
  3. Escalate the exposure for accountable exception and mitigation decisions.
  4. Enrich findings with business service and asset criticality inventory.

Explanation

Correct Answer

D:

Vulnerability prioritization improves when technical evidence includes business impact. Enrich vulnerability findings with asset value.

Incorrect Answers

A:

Ambiguous accountability delays closure of shared vulnerabilities. It would resolve cross-team vulnerability ownership, but it would not enrich vulnerability findings with asset value.

B:

Urgency must balance exploit risk and business interruption. It could help plan critical patch around legal deadline, but it would not enrich vulnerability findings with asset value.

C:

Informal postponement is not valid risk acceptance. That is relevant to asset ownership and patch urgency, not to enrich vulnerability findings with asset value.

Question 485

Two departments own duplicate vulnerable components and each assumes the other will patch. What is the MOST appropriate analyst action based on the evidence?

  1. Assign explicit remediation owners and track dependent validation checkpoints.
  2. Enrich findings with business service and asset criticality inventory.
  3. Coordinate risk mitigation and a controlled maintenance decision with service owners.
  4. Escalate the exposure for accountable exception and mitigation decisions.

Explanation

Correct Answer

A:

Ambiguous accountability delays closure of shared vulnerabilities. Resolve cross-team vulnerability ownership.

Incorrect Answers

B:

Vulnerability prioritization improves when technical evidence includes business impact. That is relevant to asset ownership and patch urgency, not to resolve cross-team vulnerability ownership.

C:

Urgency must balance exploit risk and business interruption. It would plan critical patch around legal deadline, but it would not resolve cross-team vulnerability ownership.

D:

Informal postponement is not valid risk acceptance. It could help enforce vulnerability exception ownership, but it would not resolve cross-team vulnerability ownership.

Question 486

A public exploit targets an open port that an upstream WAF cannot inspect. Which next step is MOST defensible for the security team?

  1. Prioritize the verified reachable exploit chain and record blocked alternatives.
  2. Review the direct origin path and enforce network-layer access control.
  3. Prioritize internal segmentation and credential hardening against lateral movement.
  4. Evaluate local attacker prerequisites and planned hardening rather than assuming internet exploitability.

Explanation

Correct Answer

B:

Application-layer filtering cannot protect traffic bypassing the protected path. Address WAF-bypass origin reachability.

Incorrect Answers

A:

Attack-path feasibility requires real connectivity evidence. That is relevant to reachability and lateral movement exposure, not to address WAF-bypass origin reachability.

C:

Internal exploitability still matters after phishing footholds. It could help address reachable internal admin vulnerability, but it would not address WAF-bypass origin reachability.

D:

Binding to loopback narrows the remote attack path. That is relevant to reachability and lateral movement exposure, not to address WAF-bypass origin reachability.

Question 487

A public exploit is discussed on social media but no verified working code exists. Which action BEST aligns with sound security operations?

  1. Confirm affected model/build identifiers before treating every product as vulnerable.
  2. Prioritize immediate containment and patching due to observed targeting.
  3. Record uncertain exploit maturity and seek corroboration before changing severity based solely on rumor.
  4. Escalate validation and remediation because local adversary capability is demonstrated.

Explanation

Correct Answer

C:

Speculation and practical weaponization are not equivalent evidence. Distinguish exploit rumor from working exploit.

Incorrect Answers

A:

Exploitation alerts must be matched to actual deployed versions. It would validate asset match for exploited advisory, but it would not distinguish exploit rumor from working exploit.

B:

Attack activity against matching exposure raises near-term risk. It could help elevate vulnerability under active targeting, but it would not distinguish exploit rumor from working exploit.

D:

Observed nearby exploitation increases relevant likelihood. It would prioritize vulnerability after local exploit observation, but it would not distinguish exploit rumor from working exploit.

Question 488

A flaw with high confidentiality impact is discovered on a public anonymous data mirror. Which response BEST addresses the security problem described?

  1. Increase remediation urgency based on external reach and business criticality.
  2. Adjust deployment priority for isolation while retaining the high technical severity.
  3. Reassess realistic entry path while preserving evidence of other potential access vectors.
  4. Assess actual dataset sensitivity before assigning data-loss business impact.

Explanation

Correct Answer

D:

Impact must reflect information present in the affected asset. Contextualize confidentiality impact to actual data.

Incorrect Answers

A:

A lower base score may still threaten an essential exposed service. It could help prioritize business-critical external flaw, but it would not contextualize confidentiality impact to actual data.

B:

CVSS base severity is not a complete measure of environmental exposure. That is relevant to cvss vector versus deployment context, not to contextualize confidentiality impact to actual data.

C:

Required user interaction may reduce likelihood for some headless deployments. It would interpret user-interaction exploit prerequisite, but it would not contextualize confidentiality impact to actual data.

Question 489

An internal honeypot captures a working exploit for a version deployed in production. Which investigative or response action BEST fits the evidence?

  1. Escalate validation and remediation because local adversary capability is demonstrated.
  2. Confirm affected model/build identifiers before treating every product as vulnerable.
  3. Record uncertain exploit maturity and seek corroboration before changing severity based solely on rumor.
  4. Prioritize immediate containment and patching due to observed targeting.

Explanation

Correct Answer

A:

Observed nearby exploitation increases relevant likelihood. Prioritize vulnerability after local exploit observation.

Incorrect Answers

B:

Exploitation alerts must be matched to actual deployed versions. It would validate asset match for exploited advisory, but it would not prioritize vulnerability after local exploit observation.

C:

Speculation and practical weaponization are not equivalent evidence. It could help distinguish exploit rumor from working exploit, but it would not prioritize vulnerability after local exploit observation.

D:

Attack activity against matching exposure raises near-term risk. That is relevant to threat intelligence in vulnerability priority, not to prioritize vulnerability after local exploit observation.

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.


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