ISC CISSP Practice Test 64
Question 630
A customer-facing API uses valid credentials but clients can modify numeric customer IDs to read other accounts. A later change introduces this additional requirement: The API adds privileged batch export for compliance officers. Select THREE elements that together supply the initial control, objective evidence of effectiveness, and the changed-requirement response. (Select THREE.)
- Perform authenticated object-level authorization tests across user and tenant roles.
- Cross-tenant object requests return denial with audit evidence and permitted reads succeed.
- Assess export authorization, logging and rate/volume limits separately.
- Check only for SQL injection and call access control testing complete.
- Use focused protocol configuration tests and negative handshakes with obsolete versions and ciphers.
- Deliberate deprecated protocol connections are rejected and supported suites negotiated.
Explanation
Correct Answers
A:Correct — initial control. Broken object-level authorization can exist despite correctly working sign-in.
B:Correct — observable control evidence. The relevant result is: Cross-tenant object requests return denial with audit evidence and permitted reads succeed. This provides a completed control test rather than an implementation promise.
C:Correct — changed condition. A new high-volume operation introduces additional role and data-loss risks.
Incorrect Answers
D:Incorrect — it fails the original constraint. Injection tests do not establish who may read a specific resource.
E:Incorrect — the measure Use focused protocol configuration tests and negative handshakes with obsolete versions and ciphers. addresses a different case: A company replaces its legacy TLS library and wants to prove the new implementation resists protocol downgrade.
F:Incorrect — this evidence applies to another case: A company replaces its legacy TLS library and wants to prove the new implementation resists protocol downgrade. The specified requirement here is A customer-facing API uses valid credentials but clients can modify numeric customer IDs to read other accounts.
Question 631
A security operations team wants to test whether its analysts detect a known adversary's lateral movement technique. What should the security manager recommend as the MOST appropriate response to the current requirement?
- Perform scoped authenticated vulnerability assessments with asset inventory and risk prioritization.
- Run an approved purple-team exercise with mapped attack emulation and detection engineering feedback.
- Interpret a quiet alert dashboard as proof that all lateral movement would be detected.
- Conduct a tightly scoped red-team exercise with deconfliction and stop conditions.
Explanation
Correct Answer
B:Adversary emulation measures detection and response outcomes against plausible behaviors. This directly addresses the stated situation.
Incorrect Answers
A:This response addresses a different condition: An enterprise has a large unpatched server inventory and needs non-disruptive identification of exposed weaknesses. The present case requires the measure described by Run an approved purple-team exercise with mapped attack emulation and detection engineering feedback.
C:No alert without a test does not prove detection coverage. The proposal would not be defensible for this case.
D:This is appropriate for a later condition (The team later wants a blind test of its real-world response readiness.), but it does not directly resolve the initial need. A blind exercise tests unprompted operational readiness rather than joint detector tuning.
Question 632
A security operations team wants to test whether its analysts detect a known adversary's lateral movement technique. A designer proposes: Interpret a quiet alert dashboard as proof that all lateral movement would be detected. What is the MOST significant security deficiency in this proposal?
- Premerge testing can catch code patterns and logic errors before deployment.
- No alert without a test does not prove detection coverage.
- Network scanning has limited visibility into application source and branches.
- A blind exercise tests unprompted operational readiness rather than joint detector tuning.
Explanation
Correct Answer
B:No alert without a test does not prove detection coverage. This is the direct weakness in the proposed action.
Incorrect Answers
A:This is an advantage of another design (Add static analysis, relevant security unit tests and peer review at controlled merge gates.), not the particular flaw of Interpret a quiet alert dashboard as proof that all lateral movement would be detected.
C:This is a limitation elsewhere: A high-risk payment application has code-level authentication changes but no developer security tests before merge. It does not explain the deficiency of the specified proposed approach.
D:This explains a later shift in requirements (The team later wants a blind test of its real-world response readiness.), not the failure of the current proposal.
Question 633
A security operations team wants to test whether its analysts detect a known adversary's lateral movement technique. The organization has now implemented this response: Run an approved purple-team exercise with mapped attack emulation and detection engineering feedback. Which observation would MOST directly demonstrate that the security objective was met?
- An approved change ticket for Run an approved purple-team exercise with mapped attack emulation and detection engineering feedback. without a completed verification result.
- Mapped simulated techniques produce expected telemetry and documented analyst actions.
- Deliberate deprecated protocol connections are rejected and supported suites negotiated.
- Controlled exercises show a statistically meaningful improvement in safe reporting.
Explanation
Correct Answer
B:Mapped simulated techniques produce expected telemetry and documented analyst actions. This validates that adversary emulation measures detection and response outcomes against plausible behaviors.
Incorrect Answers
A:An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Mapped simulated techniques produce expected telemetry and documented analyst actions.
C:This demonstrates controls in another circumstance: A company replaces its legacy TLS library and wants to prove the new implementation resists protocol downgrade.
D:This other observation is relevant to: A security awareness program tracks course attendance but not user reporting behavior during phishing tests.
Question 634
A previous security situation was: A security operations team wants to test whether its analysts detect a known adversary's lateral movement technique. Now the requirement changes: The team later wants a blind test of its real-world response readiness. Which NEW action BEST answers the changed need?
- Mapped simulated techniques produce expected telemetry and documented analyst actions.
- Conduct a tightly scoped red-team exercise with deconfliction and stop conditions.
- Run an approved purple-team exercise with mapped attack emulation and detection engineering feedback.
- Interpret a quiet alert dashboard as proof that all lateral movement would be detected.
Explanation
Correct Answer
B:A blind exercise tests unprompted operational readiness rather than joint detector tuning. The revised action is Conduct a tightly scoped red-team exercise with deconfliction and stop conditions.
Incorrect Answers
A:This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Mapped simulated techniques produce expected telemetry and documented analyst actions.
C:This is the appropriate response to the original situation: Adversary emulation measures detection and response outcomes against plausible behaviors. It does not directly meet the new condition.
D:This remains inappropriate: No alert without a test does not prove detection coverage.
Question 635
A development team must assess a compiled mobile app without access to all upstream source code. What should the security manager recommend as the MOST appropriate response to the current requirement?
- Use approved black-box dynamic testing plus available dependency and binary analysis.
- Declare source-only static analysis complete when no relevant source is available.
- Add code review and SAST to broaden test depth and confirm provenance.
- Add static analysis, relevant security unit tests and peer review at controlled merge gates.
Explanation
Correct Answer
A:Testing strategy should match visibility into the application and release artifacts. This directly addresses the stated situation.
Incorrect Answers
B:A test depending on absent source cannot evaluate the delivered executable. The proposal would not be defensible for this case.
C:This is appropriate for a later condition (The vendor supplies authoritative source and build scripts after procurement.), but it does not directly resolve the initial need. Source availability expands possible assurance methods beyond binary-only evaluation.
D:This response addresses a different condition: A high-risk payment application has code-level authentication changes but no developer security tests before merge. The present case requires the measure described by Use approved black-box dynamic testing plus available dependency and binary analysis.
Question 636
A development team must assess a compiled mobile app without access to all upstream source code. A designer proposes: Declare source-only static analysis complete when no relevant source is available. What is the MOST significant security deficiency in this proposal?
- A test depending on absent source cannot evaluate the delivered executable.
- Documentation is not proof of effective listener configuration.
- Source availability expands possible assurance methods beyond binary-only evaluation.
- Protocol security must be validated against actual negotiated behavior.
Explanation
Correct Answer
A:A test depending on absent source cannot evaluate the delivered executable. This is the direct weakness in the proposed action.
Incorrect Answers
B:This is a limitation elsewhere: A company replaces its legacy TLS library and wants to prove the new implementation resists protocol downgrade. It does not explain the deficiency of the specified proposed approach.
C:This explains a later shift in requirements (The vendor supplies authoritative source and build scripts after procurement.), not the failure of the current proposal.
D:This is an advantage of another design (Use focused protocol configuration tests and negative handshakes with obsolete versions and ciphers.), not the particular flaw of Declare source-only static analysis complete when no relevant source is available.
Question 637
A development team must assess a compiled mobile app without access to all upstream source code. The organization has now implemented this response: Use approved black-box dynamic testing plus available dependency and binary analysis. Which observation would MOST directly demonstrate that the security objective was met?
- Mobile tests capture input handling, storage and transport controls of the shipped app.
- Cross-tenant object requests return denial with audit evidence and permitted reads succeed.
- Sampled reviews identify removed excess rights with documented rationale and follow-up.
- An approved change ticket for Use approved black-box dynamic testing plus available dependency and binary analysis. without a completed verification result.
Explanation
Correct Answer
A:Mobile tests capture input handling, storage and transport controls of the shipped app. This validates that testing strategy should match visibility into the application and release artifacts.
Incorrect Answers
B:This demonstrates controls in another circumstance: A customer-facing API uses valid credentials but clients can modify numeric customer IDs to read other accounts.
C:This other observation is relevant to: A privilege access-review process is required quarterly, but managers approve entire lists without examining entitlement changes.
D:An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Mobile tests capture input handling, storage and transport controls of the shipped app.
Question 638
A previous security situation was: A development team must assess a compiled mobile app without access to all upstream source code. Now the requirement changes: The vendor supplies authoritative source and build scripts after procurement. Which NEW action BEST answers the changed need?
- Add code review and SAST to broaden test depth and confirm provenance.
- Use approved black-box dynamic testing plus available dependency and binary analysis.
- Declare source-only static analysis complete when no relevant source is available.
- Mobile tests capture input handling, storage and transport controls of the shipped app.
Explanation
Correct Answer
A:Source availability expands possible assurance methods beyond binary-only evaluation. The revised action is Add code review and SAST to broaden test depth and confirm provenance.
Incorrect Answers
B:This is the appropriate response to the original situation: Testing strategy should match visibility into the application and release artifacts. It does not directly meet the new condition.
C:This remains inappropriate: A test depending on absent source cannot evaluate the delivered executable.
D:This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Mobile tests capture input handling, storage and transport controls of the shipped app.
Question 639
A manufacturer uses industrial controllers whose processes cannot tolerate active port scans during production. What should the security manager recommend as the MOST appropriate response to the current requirement?
- Run aggressive authenticated scanning on live controllers at maximum concurrency.
- Conduct a controlled active test on the approved isolated maintenance window.
- Use focused protocol configuration tests and negative handshakes with obsolete versions and ciphers.
- Plan passive discovery and lab-based tests coordinated with plant safety owners.
Explanation
Correct Answer
D:Safety-critical OT testing must avoid disruptive techniques that threaten physical operations. This directly addresses the stated situation.
Incorrect Answers
A:Disruptive scanning may interrupt fragile controllers and create safety hazards. The proposal would not be defensible for this case.
B:This is appropriate for a later condition (The plant schedules a verified maintenance outage for selected devices.), but it does not directly resolve the initial need. Maintenance conditions may permit stronger active validation with managed safety risk.
C:This response addresses a different condition: A company replaces its legacy TLS library and wants to prove the new implementation resists protocol downgrade. The present case requires the measure described by Plan passive discovery and lab-based tests coordinated with plant safety owners.
Question 640
A manufacturer uses industrial controllers whose processes cannot tolerate active port scans during production. A designer proposes: Run aggressive authenticated scanning on live controllers at maximum concurrency. What is the MOST significant security deficiency in this proposal?
- Injection tests do not establish who may read a specific resource.
- Maintenance conditions may permit stronger active validation with managed safety risk.
- Broken object-level authorization can exist despite correctly working sign-in.
- Disruptive scanning may interrupt fragile controllers and create safety hazards.
Explanation
Correct Answer
D:Disruptive scanning may interrupt fragile controllers and create safety hazards. This is the direct weakness in the proposed action.
Incorrect Answers
A:This is a limitation elsewhere: A customer-facing API uses valid credentials but clients can modify numeric customer IDs to read other accounts. It does not explain the deficiency of the specified proposed approach.
B:This explains a later shift in requirements (The plant schedules a verified maintenance outage for selected devices.), not the failure of the current proposal.
C:This is an advantage of another design (Perform authenticated object-level authorization tests across user and tenant roles.), not the particular flaw of Run aggressive authenticated scanning on live controllers at maximum concurrency.