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Certified Information Systems Security Professional CISSP Practice Test 41

Question 400

A scanner lists many possible CVEs across public hosts. Executives call the report evidence that attackers can compromise customer records. What assessment approach BEST substantiates or corrects the claim?

  1. Use validated vulnerability assessment for exposure inventory, then authorized penetration testing of representative exploit paths and business impact under agreed rules of engagement.
  2. Count CVE identifiers as confirmed exploited breaches and report the total without validating findings.
  3. Run destructive exploits on production without owner authorization to ensure the result is realistic.
  4. Replace periodic scanning entirely with one annual penetration test of a single endpoint.

Explanation

Correct Answer

A:

A scanner match is not proof of exploitation; a scoped penetration test can demonstrate feasible attack paths, while continued scanning is needed for broader coverage.

Incorrect Answers

B:

Potential vulnerabilities are not the same as proven exploitation or impact on protected data.

C:

Unapproved intrusive testing can create legal and availability harms; scope and rules of engagement must precede exploitation.

D:

A point-in-time test cannot provide broad continuous asset and vulnerability coverage for the fleet.

Question 401

A professional penetration test demonstrates one exploitable path into a representative application. What is the MOST important limitation when reporting assurance to leadership?

  1. The test samples scoped assets, timing and attack techniques; continuous exposure and untested paths still require vulnerability assessment and other controls.
  2. A successful penetration test proves every vulnerability scanner finding is exploitable.
  3. Penetration testing automatically authorizes investigators to expand into any connected third-party service.
  4. A clean penetration test guarantees there are no undiscovered vulnerabilities.

Explanation

Correct Answer

A:

NIST SP 800-115 separates technical assessment techniques and their limits. Demonstrating one path does not establish exhaustive vulnerability coverage across all systems or times.

Incorrect Answers

B:

A demonstrated exploit applies to that tested path; unrelated scanner findings still need validation and prioritization.

C:

Testing authority remains limited to approved scope and ownership regardless of discovered connectivity.

D:

No finite test can prove the absence of all flaws, especially beyond its coverage and time window.

Question 402

An assessment program claims it distinguishes potential technical weaknesses from proven attacker paths. Which deliverable BEST supports that claim?

  1. A spreadsheet lists 300 CVEs without evidence of exploitability or affected business data.
  2. A single exploit video is published publicly without rules-of-engagement evidence or scoping.
  3. A management slide states no risk remains because the last pen test found no critical defects.
  4. A scoped report separates detected and validated weaknesses from evidence-backed exploit chains, documents scope and uncertainty, and assigns risk-informed remediation.

Explanation

Correct Answer

D:

The report communicates what was scanned, what was tested, what actually succeeded and what remains unproven, avoiding overstatement of assurance.

Incorrect Answers

A:

Raw detection inventory is not proof of tested exploit paths or business consequences.

B:

An isolated demonstration without authorization and context does not support an accountable assessment program.

C:

Absence of observed critical findings in one scope is not proof of complete security assurance.

Question 403

A penetration tester proposes destructive exploit payloads against a production patient system without recovery plans. As the accountable security practitioner, which response BEST addresses the specific weakness without introducing a different untested control?

  1. Use non-destructive tests or a representative isolated environment under approved safety constraints.
  2. Run destructive exploit payloads against live patient monitoring equipment without a tested recovery path.
  3. Grant testers unlimited production privileges to simulate attack impact without rules of engagement.
  4. Cancel all security testing permanently because production systems are sensitive.

Explanation

Correct Answer

A:

Testing value must be balanced against availability, privacy and patient safety risk. Isolated test results may not exactly represent production and need documented limitations.

Incorrect Answers

B:

A production test can create unacceptable patient-safety and availability harm.

C:

Unbounded scope undermines safe and authorized security assessment.

D:

Risk-sensitive testing can use safe methods or representative isolation rather than abandoning assurance.

Question 404

The organization implemented the response to this scenario: A penetration tester proposes destructive exploit payloads against a production patient system without recovery plans. The approved response was: Use non-destructive tests or a representative isolated environment under approved safety constraints. Which statement MOST accurately identifies a remaining risk or constraint?

  1. An isolated test environment automatically reproduces every production dependency and control path.
  2. A signed penetration-testing contract permits arbitrary destructive techniques regardless of scope and safety constraints.
  3. A quiet system after a destructive test means no patient-safety harm was possible.
  4. Isolated test results may not exactly represent production and need documented limitations.

Explanation

Correct Answer

D:

Testing value must be balanced against availability, privacy and patient safety risk. Approved tests demonstrate control behavior without damaging patient workflows.

Incorrect Answers

A:

Test environments may differ; limitations need explicit mapping to production risk.

B:

Authorized assessment must still obey approved methods, timing and recovery rules.

C:

Testing outcomes require business and operational impact evaluation beyond scanner completion.

Question 405

Management implemented a response after this event: A penetration tester proposes destructive exploit payloads against a production patient system without recovery plans. The response was: Use non-destructive tests or a representative isolated environment under approved safety constraints. Which observed outcome BEST verifies that the intended security protection operates, rather than merely appearing in a plan?

  1. Testers demonstrate an exploit by interrupting critical patient service without an approved fallback.
  2. A lab exercise finds a weakness but its report presents it as proven production exploitability without environment comparison.
  3. The assessment identifies many vulnerabilities but cannot show that live patients remained protected during the exercise.
  4. Approved tests demonstrate control behavior without damaging patient workflows.

Explanation

Correct Answer

D:

Approved tests demonstrate control behavior without damaging patient workflows. Testing value must be balanced against availability, privacy and patient safety risk.

Incorrect Answers

A:

Successful exploitation is not a safe authorized assessment outcome.

B:

A representative test needs explicit scope and limitations.

C:

Finding counts do not replace availability and safety controls.

Question 406

Internet-only vulnerability scanning shows no critical findings, but internal server package inventories reveal old vulnerable libraries accessible after authentication. What should the assessment plan add?

  1. Keep only unauthenticated perimeter scans and treat their empty result as a complete software inventory.
  2. Grant the scanner permanent domain administrator access across all networks without scoping.
  3. Disable local authentication logs during scans to make results faster.
  4. Authorized credentialed scanning and configuration analysis using least-privileged, protected assessor accounts, alongside external exposure tests.

Explanation

Correct Answer

D:

Unauthenticated network probes cannot inspect every installed package or internal setting. Credentialed assessment expands coverage but requires explicit authorization and credential custody.

Incorrect Answers

A:

A lack of external signatures does not prove current internal package or configuration state.

B:

Scanner credentials are high-value assets and need proportionate privilege, storage and expiration.

C:

Suppressed logging impairs accountability and does not improve the relevant vulnerability detection scope.

Question 407

A company adds credentialed vulnerability scans to its server baseline. What associated security risk should the assessment owner explicitly manage?

  1. A scanner service account cannot be misused because the software vendor calls it read-only.
  2. Scanner credentials can provide privileged lateral access if stolen, so limit privileges, vault access, rotate and monitor their use.
  3. Store scanning passwords in shared plain-text documentation so every technician can troubleshoot.
  4. Consider a successful scan result proof that scan credentials will never be exposed later.

Explanation

Correct Answer

B:

Deeper scan visibility often uses powerful identities. Credential custody and narrowly authorized scope are necessary to avoid turning a defensive scanner into an attack platform.

Incorrect Answers

A:

Effective privilege may exceed a product label; real API and host permissions must be reviewed.

C:

Distributing credentials increases compromise and removes individual accountability.

D:

A completed assessment does not replace ongoing secret lifecycle and privilege monitoring.

Question 408

An assessment program claims it detects package/configuration weaknesses missed by external scanners without granting broad permanent credentials. What evidence best supports the improvement?

  1. A perimeter scan returns zero findings, but an intentionally outdated internal package is not inventoried.
  2. Credentialed tests identify known internal package issues on sampled hosts, while scanner roles cannot alter unrelated resources and secrets remain protected.
  3. Credentialed scans identify a flaw only after granting unrestricted domain administrator for all workstations.
  4. A scanner is installed but no authenticated host sample or permissions test is performed.

Explanation

Correct Answer

B:

The evidence verifies both increased assessment coverage and that the assessment process itself respects least privilege.

Incorrect Answers

A:

This confirms the original blind spot rather than eliminating it.

C:

Coverage is improved at the cost of an excessive credential exposure inconsistent with the requirement.

D:

Installation status does not prove detection efficacy or credential scope.

Question 409

A vulnerability scanner reports a patched device as exploitable because the version banner did not change. What is the BEST assessment response?

  1. Ignore every scanner finding because signatures are sometimes wrong.
  2. Mark the vulnerability resolved solely because a patch ticket was opened.
  3. Corroborate the finding using vendor patch evidence, configuration, relevant exposure and safe functional checks.
  4. Exploit the production device without authorization to force a definitive answer.

Explanation

Correct Answer

C:

A signature match can be a false positive; validation must establish affected code and reachable behavior.

Incorrect Answers

A:

False positives require triage rather than rejecting useful vulnerability detection.

B:

An open ticket is not evidence of successful remediation.

D:

Unsafe unapproved exploitation can cause business harm and is not required for every finding.

Question 410

An analyst closes the banner-based finding after verifying a backported vendor patch. What future risk should be managed?

  1. New exposure paths, configuration changes or vendor revisions may invalidate the exception and require reassessment.
  2. Every future alert with the same CVE must be ignored on all device models.
  3. The original scanner score is legal proof that exploitation occurred.
  4. A confirmed false positive must never be recorded in the exception register.

Explanation

Correct Answer

A:

A point-in-time false positive decision is contingent on specific facts and controls.

Incorrect Answers

B:

Patch status and exposure vary across versions, instances and configurations.

C:

Severity metadata does not establish observed compromise.

D:

Traceable findings and justified decisions aid future reevaluation.

Certified Information Systems Security Professional (CISSP) Practice Tests

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