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CAS-005 Learning Materials: CompTIA SecurityX Certification Exam & CAS-005 Questions and Answers

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CompTIA CAS-005 Exam Syllabus Topics:

Topic
Details

Topic 1

Security Engineering: This section measures the skills of CompTIA security architects that involve troubleshooting common issues related to identity and access management (IAM) components within an enterprise environment. Candidates will analyze requirements to enhance endpoint and server security while implementing hardware security technologies. This domain also emphasizes the importance of advanced cryptographic concepts in securing systems.

Topic 2

Security Operations: This domain is designed for CompTIA security architects and covers analyzing data to support monitoring and response activities, as well as assessing vulnerabilities and recommending solutions to reduce attack surfaces. Candidates will apply threat-hunting techniques and utilize threat intelligence concepts to enhance operational security.

Topic 3

Governance, Risk, and Compliance: This section of the exam measures the skills of CompTIA security architects that cover the implementation of governance components based on organizational security requirements, including developing policies, procedures, and standards. Candidates will learn about managing security programs, including awareness training on phishing and social engineering.

Topic 4

Security Architecture: This domain focuses on analyzing requirements to design resilient systems, including the configuration of firewalls and intrusion detection systems.

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Exam CAS-005 Outline & CAS-005 Valid Real Exam

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CompTIA SecurityX Certification Exam Sample Questions (Q155-Q160):

NEW QUESTION # 155
A vulnerability can on a web server identified the following:

Which of the following actions would most likely eliminate on path decryption attacks? (Select two).

A. Increasing the key length to 256 for TLS_RSA_WITH_AES_128_CBC_SHA
B. Disallowing cipher suites that use ephemeral modes of operation for key agreement
C. Removing support for CBC-based key exchange and signing algorithms
D. Restricting cipher suites to only allow TLS_RSA_WITH_AES_128_CBC_SHA
E. Adding TLS_ECDHE_ECDSA_WITH_AE3_256_GCMS_HA256
F. Implementing HIPS rules to identify and block BEAST attack attempts

Answer: C,E

Explanation:
On-path decryption attacks, such as BEAST (Browser Exploit Against SSL/TLS) and other related vulnerabilities, often exploit weaknesses in the implementation of CBC (Cipher Block Chaining) mode. To mitigate these attacks, the following actions are recommended:
B: Removing support for CBC-based key exchange and signing algorithms: CBC mode is vulnerable to certain attacks like BEAST. By removing support for CBC-based ciphers, you can eliminate one of the primary vectors for these attacks. Instead, use modern cipher modes like GCM (Galois/Counter Mode) which offer better security properties.
C: Adding TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256: This cipher suite uses Elliptic Curve Diffie-Hellman Ephemeral (ECDHE) for key exchange, which provides perfect forward secrecy. It also uses AES in GCM mode, which is not susceptible to the same attacks as CBC. SHA-256 is a strong hash function that ensures data integrity.

NEW QUESTION # 156
During DAST scanning, applications are consistently reporting code defects in open-source libraries that were used to build web applications. Most of the code defects are from using libraries with known vulnerabilities. The code defects are causing product deployment delays.
Which of the following is the best way to uncover these issues earlier in the life cycle?

A. Directing application logs to the SIEM for continuous monitoring
B. Using a software dependency management solution
C. Modifying the WAF polices to block against known vulnerabilities
D. Completing an IAST scan against the web application

Answer: B

NEW QUESTION # 157
A vulnerability can on a web server identified the following:

Which of the following actions would most likely eliminate on path decryption attacks? (Select two).

A. Increasing the key length to 256 for TLS_RSA_WITH_AES_128_CBC_SHA
B. Disallowing cipher suites that use ephemeral modes of operation for key agreement
C. Removing support for CBC-based key exchange and signing algorithms
D. Restricting cipher suites to only allow TLS_RSA_WITH_AES_128_CBC_SHA
E. Adding TLS_ECDHE_ECDSA_WITH_AE3_256_GCMS_HA256
F. Implementing HIPS rules to identify and block BEAST attack attempts

Answer: C,E

Explanation:
On-path decryption attacks, such as BEAST (Browser Exploit Against SSL/TLS) and other related vulnerabilities, often exploit weaknesses in the implementation of CBC (Cipher Block Chaining) mode. To mitigate these attacks, the following actions are recommended:
B . Removing support for CBC-based key exchange and signing algorithms: CBC mode is vulnerable to certain attacks like BEAST. By removing support for CBC-based ciphers, you can eliminate one of the primary vectors for these attacks. Instead, use modern cipher modes like GCM (Galois/Counter Mode) which offer better security properties.
C . Adding TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256: This cipher suite uses Elliptic Curve Diffie-Hellman Ephemeral (ECDHE) for key exchange, which provides perfect forward secrecy. It also uses AES in GCM mode, which is not susceptible to the same attacks as CBC. SHA-256 is a strong hash function that ensures data integrity.
Reference:
CompTIA Security+ Study Guide
NIST SP 800-52 Rev. 2, "Guidelines for the Selection, Configuration, and Use of Transport Layer Security (TLS) Implementations" OWASP (Open Web Application Security Project) guidelines on cryptography and secure communication

NEW QUESTION # 158
An auditor is reviewing the logs from a web application to determine the source of an incident. The web application architecture includes an internet-accessible application load balancer, a number of web servers in a private subnet, application servers, and one database server in a tiered configuration. The application load balancer cannot store the logs. The following are sample log snippets:
Web server logs:
192.168.1.10 - - [24/Oct/2020 11:24:34 +05:00] "GET /bin/bash" HTTP/1.1" 200 453 Safari/536.36
192.168.1.10 - - [24/Oct/2020 11:24:35 +05:00] "GET / HTTP/1.1" 200 453 Safari/536.36 Application server logs:
24/Oct/2020 11:24:34 +05:00 - 192.168.2.11 - request does not match a known local user. Querying DB
24/Oct/2020 11:24:35 +05:00 - 192.168.2.12 - root path. Begin processing Database server logs:
24/Oct/2020 11:24:34 +05:00 [Warning] 'option read_buffer_size1 unassigned value 0 adjusted to 2048
24/Oct/2020 11:24:35 +05:00 [Warning] CA certificate ca.pem is self-signed.
Which of the following should the auditor recommend to ensure future incidents can be traced back to the sources?

A. Enable the X-Forwarded-For header at the load balancer.
B. Use stored procedures on the database server.
C. Store the value of the $_SERVER['REMOTE_ADDR'] received by the web servers.
D. Install a certificate signed by a trusted CA.
E. Install a software-based HIDS on the application servers.

Answer: A

Explanation:
The issue is tracing the original source of requests in a tiered architecture with a load balancer. The web server logs show internal IPs (192.168.1.10), not the external client IPs, because the load balancer forwards requests without preserving the source. Enabling theX-Forwarded-Forheader on the load balancer adds the client's original IP to the HTTP request headers, allowing downstream servers to log it. This ensures traceability without altering the architecture significantly.
* Option A:Correct-X-Forwarded-For is the standard solution for preserving client IPs through load balancers.
* Option B:A Host-based Intrusion Detection System (HIDS) detects anomalies but doesn't address IP traceability.
* Option C:A trusted CA certificate fixes the self-signed warning but is unrelated to source tracking.
* Option D:Stored procedures improve database security but don't help with IP logging.
* Option E:Storing $_SERVER['REMOTE_ADDR'] captures the load balancer's IP, not the client's, unless X-Forwarded-For is enabled.

NEW QUESTION # 159
An organization has noticed an increase in phishing campaigns utilizing typosquatting. A security analyst needs to enrich the data for commonly used domains against the domains used in phishing campaigns. The analyst uses a log forwarder to forward network logs to the SIEM. Which of the following would allow the security analyst to perform this analysis?

A. Create a parser that matches domains.
B. Develop a query that filters out all matching domain names.
C. Use a cron job to regularly update and compare domains.
D. Implement a dashboard on the SIEM that shows the percentage of traffic by domain.

Answer: A

Explanation:
Comprehensive and Detailed Explanation:
The question addresses how a security analyst can compare legitimate domains with typosquatted domains using a SIEM (Security Information and Event Management) system.
* Understanding Typosquatting:
* Typosquatting involves registering domains with minor spelling changes to deceive users (e.g., goog1e.com instead of google.com).
* Attackers use these domains in phishing emails or malicious ads.
* Security analysts need to match legitimate domains against typosquatted domains in real- time.
* Why Option B is Correct:
* A parser is a tool that extracts structured data from logs.
* In this case, a custom parser can identify domain names in network traffic logs and compare them to known typosquatted domains.
* This approach enables real-time detection of suspicious domains in SIEM.
* Why Other Options Are Incorrect:
* A (Cron job for updates): A cron job automates scheduled tasks but does not perform real- time matching. It is inefficient for immediate detection.
* C (Query to filter matching domains): A query alone can search for known domains, but it does not continuously enrich data or handle variations of domain names dynamically.
* D (Dashboard to show domain traffic percentages): A dashboard provides visualization, not active threat detection. It does not analyze logs for typosquatting.

NEW QUESTION # 160
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