CompTIA CS0-003 Practice Test 40

Question 390

A credentialed scan returns access denied on registry checks but marks the host clean. What is the MOST appropriate analyst action based on the evidence?

Perform a credentialed operating-system scan using approved read-only credentials.
Report incomplete scan coverage and repair account permissions before interpreting the result.
Restrict scanning credentials to the minimal read and query permissions.
Use authorized external unauthenticated assessment to establish visible attack surface.

Explanation

Correct Answer

Missing authenticated checks create false assurance when results are incomplete. Identify partial credentialed scan falsely clean.

Incorrect Answers

Local package inventory reveals vulnerabilities invisible from unauthenticated port probes. That is relevant to credentialed versus unauthenticated scans, not to identify partial credentialed scan falsely clean.

Credentialed assessment need not grant broad administrative write authority. It could help reduce scanner credential privilege, but it would not identify partial credentialed scan falsely clean.

An external vantage reveals exposure but cannot replace internal configuration assessment. That is relevant to credentialed versus unauthenticated scans, not to identify partial credentialed scan falsely clean.

Question 391

An SCA tool reports a vulnerable library bundled but never loaded by the deployed application. Which next step is MOST defensible for the security team?

Compare immutable image digests and rescan the exact deployed artifact.
Verify whether user-controlled input can reach arbitrary external URLs.
Assess reachable code paths and dependency packaging while retaining component inventory.
Trace the dataflow and actual database execution sink before confirming injection.

Explanation

Correct Answer

Presence of a library and reachable vulnerable functionality are distinct risks. Contextualize unreachable vulnerable dependency.

Incorrect Answers

Mutable tags can drift and invalidate image scan attribution. It would anchor container finding to deployed digest, but it would not contextualize unreachable vulnerable dependency.

Redirect risk depends on attacker control over actual destination. It could help challenge constrained redirect finding, but it would not contextualize unreachable vulnerable dependency.

Source pattern detection must account for safe parameterization. It would validate SAST SQL injection false positive, but it would not contextualize unreachable vulnerable dependency.

Question 392

A TLS scanner claims weak ciphers but its scan used a protocol version no longer negotiated in production. Which action BEST aligns with sound security operations?

Verify backend software through authorized inventory and patch records.
Classify certificate configuration separately from evidence of malicious interception.
Verify actual method availability through the complete gateway-to-app path.
Check effective protocol and cipher negotiation from representative clients.

Explanation

Correct Answer

Supported configurations must be evaluated against actual handshake policy. Verify weak TLS suite is actually negotiable.

Incorrect Answers

Reverse proxies can mask real software versions and confuse fingerprinting. It could help reject unsupported backend version inference, but it would not verify weak TLS suite is actually negotiable.

Name mismatches can reflect deployment errors without an attacker. That is relevant to port banner and version uncertainty, not to verify weak TLS suite is actually negotiable.

Listed methods alone do not prove a callable dangerous operation. It would validate effective HTTP method exposure, but it would not verify weak TLS suite is actually negotiable.

Question 393

Nikto reports an exposed default admin path but authentication and network policy prevent access. Which response BEST addresses the security problem described?

Validate reachable exposure and document layered controls instead of equating path existence with compromise.
Validate whether the endpoint changes state and relies on cookie authentication.
Evaluate its sensitivity, scope and browser behavior before assigning impact.
Test output context and encoding safely to distinguish reflection from exploitable XSS.

Explanation

Correct Answer

Directory existence alone cannot establish unauthorized access. Assess default admin path exploitability.

Incorrect Answers

CSRF risk depends on state-changing actions and browser credential behavior. It would challenge generic CSRF scanner finding, but it would not assess default admin path exploitability.

Cookie flags matter according to the data and security function involved. It could help contextualize cookie security flag finding, but it would not assess default admin path exploitability.

Mere reflection is insufficient if content is safely encoded or nonexecutable. That is relevant to web application scanner evidence, not to assess default admin path exploitability.

Question 394

An external scan shows a public service was closed but new equivalent service appeared on a different port. Which investigative or response action BEST fits the evidence?

Validate actual privilege, network reach and affected asset context.
Evaluate complete service exposure rather than closing by old port number alone.
Reconcile short-lived instance lineage and deduplicate against image or service risk.
Verify expected check inventory and control coverage before declaring progress.

Explanation

Correct Answer

Attack surface can move while underlying risk remains. Detect relocated vulnerable service.

Incorrect Answers

Realistic path conditions determine whether a theoretical sequence is feasible. It would assess attack-path prerequisites, but it would not detect relocated vulnerable service.

Churn in asset identifiers can inflate findings without increased exploit surface. That is relevant to report reconciliation and scanner coverage, not to detect relocated vulnerable service.

Fewer evaluated tests can falsely improve apparent compliance. It would detect lost baseline coverage masquerading as improvement, but it would not detect relocated vulnerable service.

Question 395

A cloud scanner marks an IAM policy condition unsafe but does not show evaluated principal attributes. What is the MOST appropriate analyst action based on the evidence?

Inspect actual firmware build and vendor security advisory for the backported fix.
Confirm disclosure on deployed URLs and remove verbose production errors.
Test representative condition contexts and effective permissions before confirming bypass.
Verify effective browser framing policy and document CSP enforcement.

Explanation

Correct Answer

IAM condition evaluation determines real authorization behavior. Check conditional cloud IAM finding.

Incorrect Answers

Banners may not track vendor security patch backports. It could help verify network-device banner versus firmware, but it would not check conditional cloud IAM finding.

Detailed application errors can aid attackers by revealing internal structure. That is relevant to findings from web and cloud scanners, not to check conditional cloud IAM finding.

CSP frame-ancestors can mitigate framing even without the older header. It could help interpret modern clickjacking policy correctly, but it would not check conditional cloud IAM finding.

Question 396

A security posture tool claims all network security groups were scanned but one cloud account was excluded. Which next step is MOST defensible for the security team?

Investigate role assumption paths and document potential future exposure.
Inspect effective ACL, policy and access-block evaluation before confirming public exposure.
Rate business impact using classification and exposure while tracking baseline noncompliance.
Fix account enumeration and record incomplete organizational coverage.

Explanation

Correct Answer

Scanner account boundaries can hide entire cloud estates from reported totals. Detect cross-account cloud scanning gap.

Incorrect Answers

Permission alone may be unreachable without a valid trust principal. That is relevant to cloud posture scanner findings, not to detect cross-account cloud scanning gap.

Cloud access is determined by multiple interacting controls. It would validate cloud public storage false positive, but it would not detect cross-account cloud scanning gap.

Configuration control failure remains valid but priority depends on asset context. It could help prioritize cloud encryption misconfiguration by context, but it would not detect cross-account cloud scanning gap.

Question 397

A binary uses address randomization but an exploit report claims a fixed reliable jump target. Which action BEST aligns with sound security operations?

Verify process memory layout and protection state in the tested build.
Classify the reproducible availability defect without overclaiming code execution.
Record the crash, stack and boundary condition for secure development remediation.
Reproduce the crash with minimized input and record exact runtime conditions.

Explanation

Correct Answer

ASLR can invalidate fixed-address exploitation assumptions. Evaluate ASLR in exploit reliability.

Incorrect Answers

Not every crash indicates an exploitable control-flow hijack. It could help distinguish DoS crash from code execution, but it would not evaluate ASLR in exploit reliability.

A debugger can reveal memory corruption without proving arbitrary code execution. That is relevant to debugging and software security evidence, not to evaluate ASLR in exploit reliability.

Reproducibility and input minimization improve defect triage. It would isolate fuzzing crash root input, but it would not evaluate ASLR in exploit reliability.

Question 398

A posture report flags use of provider-managed encryption keys as no encryption. Which response BEST addresses the security problem described?

Verify effective attachments and live use before removing the rule.
Check actual service encryption status and relevant key-management requirement.
Interpret results within that identity's scope rather than claiming tenant-wide privilege.
Combine cloud control-plane configuration with network service observations.

Explanation

Correct Answer

Managed encryption and customer-managed encryption are different controls. Distinguish encryption type from encryption absence.

Incorrect Answers

An apparently stale rule can still influence active workload communication. It could help validate orphaned rule's actual attachment, but it would not distinguish encryption type from encryption absence.

Cloud assessment reflects the permissions of the identity under test. It would scope Pacu findings to tested principal, but it would not distinguish encryption type from encryption absence.

Cloud architecture findings need both routing and backend entitlement context. It could help correlate external load balancer and backend exposure, but it would not distinguish encryption type from encryption absence.

Question 399

A critical scan result only lists an IP shared by multiple container applications. Which investigative or response action BEST fits the evidence?

Add reproducible finding evidence and owner context before assigning remediation.
Validate the vendor's package release metadata against installed build artifacts.
Resolve namespace, service and image digest before assigning the software owner.
Review production impact and choose a controlled remediation or compensating control.

Explanation

Correct Answer

Shared infrastructure identifiers are insufficient for container remediation. Identify affected container owner.

Incorrect Answers

Actionable tickets need sufficient evidence to target the correct system. That is relevant to vulnerability ticket evidence completeness, not to identify affected container owner.

Version strings can be misleading in downstream distributions. It would validate vendor backport in scanner output, but it would not identify affected container owner.

Scanner suggestions are not equivalent to an approved business change. That is relevant to vulnerability ticket evidence completeness, not to identify affected container owner.

Question 400

A vulnerability finding references a product version but vendor backported the fix under a different build name. What is the MOST appropriate analyst action based on the evidence?

Add reproducible finding evidence and owner context before assigning remediation.
Review production impact and choose a controlled remediation or compensating control.
Resolve namespace, service and image digest before assigning the software owner.
Validate the vendor's package release metadata against installed build artifacts.

Explanation

Correct Answer

Version strings can be misleading in downstream distributions. Validate vendor backport in scanner output.

Incorrect Answers

Actionable tickets need sufficient evidence to target the correct system. It would enrich incomplete CVE remediation ticket, but it would not validate vendor backport in scanner output.

Scanner suggestions are not equivalent to an approved business change. It could help challenge disruptive scanner remediation advice, but it would not validate vendor backport in scanner output.

Shared infrastructure identifiers are insufficient for container remediation. That is relevant to vulnerability ticket evidence completeness, not to validate vendor backport in scanner output.

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Question 390

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Question 391

Explanation

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Question 392

Explanation

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Question 393

Explanation

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Question 394

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Question 395

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Question 396

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Question 397

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Question 398

Explanation

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Question 399

Explanation

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Question 400

Explanation

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CompTIA CySA+ (CS0-003) (CS0-003) Practice Tests