CAS-005 Exam Dumps - CompTIA CASP Questions and Answers

The most likely explanation for the issues encountered with the captive portal is that the TLS ciphers supported by the captive portal are deprecated. Here’s why:

TLS Cipher Suites: Modern browsers are continuously updated to support the latest security standards and often drop support for deprecated and insecure cipher suites. If the captive portal uses outdated TLS ciphers, newer browsers may refuse to connect, causing security errors.

HSTS and Browser Security: Browsers with HTTP Strict Transport Security (HSTS) enabled will not allow connections to sites with weak security configurations. Deprecated TLS ciphers would cause these browsers to block the connection.

Formal methods in software engineering use mathematically based specifications to ensure system correctness, safety, and compliance with requirements. SecurityX CAS-005 stresses the importance of traceability between code and both functional and non-functional requirements for high-assurance systems like avionics. A lack of traceability means it is impossible to verify that the implementation meets all required safety and performance standards—exactly what formal methods address.

Tokenizationreplaces sensitive data (e.g., PII) with non-sensitive placeholders while maintaining format consistency, ensuring compliancewithout disrupting testing. This method is commonly used forPCI-DSS and GDPR compliancewhile preserving data structure for functional tests.

Encryption (A)secures data but does not remove sensitivity or solve testing concerns.

Truncation (B)removes portions of data but may impact testing if format requirements are strict.

Synthetic data (C)can be useful but may not always match real-world scenarios perfectly for testing purposes.

The routing entry 0.0.0.0/0 forces all traffic from remote clients—including traffic destined for the public internet—through the VPN tunnel. This is called full-tunnel VPN routing. While it ensures strong security by forcing all traffic to pass through corporate controls, it can also overload VPN gateways and cause slow access to both internal and external applications, as seen in this scenario.

The correct fix is to enable split tunneling (B). Split tunneling allows only corporate traffic (e.g., private IP ranges or internal applications) to flow through the VPN, while internet-bound traffic routes directly to the internet. This reduces congestion on VPN concentrators, improves performance for remote users, and ensures efficient use of bandwidth.

Moving servers to a screened subnet (A) relates to internal segmentation but does not fix the VPN bottleneck. NAC (C) enforces device compliance but does not address routing inefficiencies. DNS over HTTPS (D) secures name resolution but is unrelated to network congestion.

Thus, enabling split tunneling balances security and performance for remote workers.

To address the specific OS benchmark configurations, the following solutions are most appropriate:

C. SCAP (Security Content Automation Protocol): SCAP helps in automating vulnerability management and policy compliance, including configurations like full disk encryption, host-based firewalls, and password policies.

D. SASE (Secure Access Service Edge): SASE provides a framework for Zero Trust network access and application allow listing, ensuring secure and compliant access to applications and data.

These solutions together cover the comprehensive security requirements specified in the OS benchmark, ensuring a robust security posture for endpoints.

The data provided shows that all companies have SIEM systems, but they differ in their implementation of UEBA, DLP, ISAC membership, and TIP integration. The key metric to evaluate is the effectiveness in detecting and responding to attacks, as shown by the "Time to Detect" and "Time to Respond" columns. Company 1, which is an ISAC member, has the fastest detection (10 minutes) and response (20 minutes) times. Company 3, which is not an ISAC member, has slower detection (12 minutes) and response (24 minutes) times, despite having UEBA and TIP integration. Company 2, which lacks TIP integration but is an ISAC member, has the slowest times (20 minutes to detect, 40 minutes to respond). This suggests that ISAC membership correlates with faster detection and response, likely due to access to shared threat intelligence.

According to the CompTIA SecurityX CAS-005 objectives (Domain 2: Security Operations, 2.2), Information Sharing and Analysis Centers (ISACs) are critical for enabling organizations to share real-timethreat intelligence within their industry. ISACs provide access to actionable intelligence, best practices, and coordinated response strategies, which are essential for defending against sophisticated attacks targeting critical infrastructure like the energy sector. The lack of ISAC membership (Company 3) limits access to this intelligence, hindering proactive defense and response capabilities. While UEBA, DLP, and TIP integration are valuable, they are more focused on internal monitoring, data protection,and individual threat intelligence feeds, respectively, and do not provide the same industry-wide collaboration as an ISAC.

The SIEM already contains multiple events that, if correlated, would have indicated an active attack sequence on VM001—such as denied connections, IPS alerts, malware detection, and then an allowed connection. CAS-005 Security Operations objectives emphasize log correlation as a way to enhance detection by linking related events across different time stamps and data sources into a single, higher-confidence alert.

Option A (adding EDR logs) could add visibility but does not address the need to connect existing events for earlier detection.

Option C (improving parsing) ensures readability but does not create actionable alerts.

Option D (creating a new malware detection rule) is redundant since malware detection already appeared in logs; the issue was the lack of correlation to act on it in time.

By correlating IDS, IPS, firewall, and malware detection logs, the SIEM can raise a higher-priority alert before the attack is completed.

A crisis management plan defines coordinated communication and response strategies for high-profile incidents that may harm an organization’s public reputation and shareholder confidence. CAS-005 GRC content includes crisis communication planning for regulatory compliance and public relations in the wake of breaches.

A Data Subject Access Request (A) addresses individual data rights, not overall crisis handling.

Business Impact Analysis (B) helps assess potential operational and financial impacts but does not manage public perception during an incident.

Supply chain management (C) is preventative for vendor risks, not responsive to current crises.

When dealing with false positives and false negatives reported by a Security Information and Event Management (SIEM) system, the goal is to enhance the accuracy of the alerts and ensure that actual threats are identified correctly. The following sources of information best support the analysis process:

A. Third-party reports and logs: Utilizing external sources of information such as threat intelligence reports, vendor logs, and other third-party data can provide a broader perspective on potential threats. These sources often contain valuable insights and context that can help correlate events more accurately, reducing the likelihood of false positives and false negatives.

B. Trends: Analyzing trends over time can help inunderstanding patterns and anomalies in the data. By observing trends, the security team can distinguish between normal and abnormal behavior, which aids in fine-tuning the SIEM configurations to better detect true positives and reduce false alerts.

Other options such as dashboards, alert failures, network traffic summaries, and manual review processes are also useful but are more operational rather than foundational for understanding the root causes of reporting errors in SIEM configurations.