CompTIA CAS-004 Online Practice Questions and Exam Preparation

CompTIA CAS-004 Online Questions & Answers

• Question 51:

  A security engineer is implementing DLP. Which of the following should the security engineer include in the overall DLP strategy?

  A. Tokenization
  B. Network traffic analysis
  C. Data classification
  D. Multifactor authentication
  C. Data classification

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  Explanation

  For a successful Data Loss Prevention (DLP) strategy, the first step is data classification. Data classification involves identifying and categorizing data based on its sensitivity and importance, which allows the DLP system to apply appropriate security controls to protect critical or sensitive information. Without proper data classification, it is difficult to implement effective DLP policies. While tokenization, network traffic analysis, and multifactor authentication can contribute to data security, classification is fundamental to building a targeted and effective DLP strategy. CASP+ highlights the importance of identifying and categorizing data as a key part of securing sensitive information and preventing data breaches.

• Question 52:

  An organization has just been breached, and the attacker is exfiltrating data from workstations. The security analyst validates this information with the firewall logs and must stop the activity immediately. Which of the following steps should the security analyst perform NEXT?

  A. Determine what data is being stolen and change the folder permissions to read only.
  B. Determine which users may have clicked on a malicious email link and suspend their accounts.
  C. Determine where the data is being transmitted and create a block rule.
  D. Determine if a user inadvertently installed malware from a USB drive and update antivirus definitions.
  E. Determine if users have been notified to save their work and turn off their workstations.
  C. Determine where the data is being transmitted and create a block rule.

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  Explanation

• Question 53:

  The Chief information Officer (CIO) asks the system administrator to improve email security at the company based on the following requirements:

  1.Transaction being requested by unauthorized individuals.

  2.Complete discretion regarding client names, account numbers, and investment information.

  3.Malicious attackers using email to malware and ransomeware.

  4.Exfiltration of sensitive company information.

  The cloud-based email solution will provide anti-malware reputation-based scanning, signature-based scanning, and sandboxing.

  Which of the following is the BEST option to resolve the boar's concerns for this email migration?

  A. Data loss prevention
  B. Endpoint detection response
  C. SSL VPN
  D. Application whitelisting
  A. Data loss prevention

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  Explanation

• Question 54:

  An organization found a significant vulnerability associated with a commonly used package in a variety of operating systems.

  The organization develops a registry of software dependencies to facilitate incident response activities. As part of the registry, the organization creates hashes of packages that have been formally vetted.

  Which of the following attack vectors does this registry address?

  A. Supply chain attack
  B. Cipher substitution attack
  C. Side-channel analysis
  D. On-path attack
  E. Pass-the-hash attack
  A. Supply chain attack

• Question 55:

  A security administrator at a global organization wants to update password complexity rules for a system containing personally identifiable information. Which of the following would be the best resource for this information?

  A. NIST
  B. GDPR
  C. CMMI
  D. COPPA
  A. NIST

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  Explanation

  NIST (National Institute of Standards and Technology): Provides comprehensive password guidelines (e.g., SP 800-63B) widely used for securing systems, including handling PII.

  GDPR (General Data Protection Regulation): Focuses on data privacy laws rather than technical password policies.

  CMMI (Capability Maturity Model Integration): Addresses process improvement, not password complexity.

  COPPA (Children's Online Privacy Protection Act): Focuses on child data privacy, not password rules.

  CASP+ Exam Objectives 5.3 ?Implement security controls and best practices using NIST standards.

• Question 56:

  A security engineer needs to select the architecture for a cloud database that will protect an organization's sensitive data. The engineer has a choice between a single-tenant or a multitenant database architecture offered by a cloud vendor. Which of the following best describes the security benefits of the single-tenant option? (Select two).

  A. Most cost-effective
  B. Ease of backup and restoration
  C. High degree of privacy
  D. Low resilience to side-channel attacks
  E. Full control and ability to customize
  F. Increased geographic diversity
  C. High degree of privacy
  E. Full control and ability to customize

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  Explanation

  Single-tenant architectures provide a dedicated environment for each client, which enhances data privacy since the resources are not shared with other tenants. This isolation minimizes the risk of data leakage or interference from other tenants, offering a high degree of privacy. Additionally, single-tenancy allows for full control over the database environment, including customization options tailored to specific security requirements or compliance needs, which is not always possible in a multi-tenant architecture.

• Question 57:

  As part of the customer registration process to access a new bank account, customers are required to upload a number of documents, including their passports and driver's licenses. The process also requires customers to take a current photo of themselves to be compared against provided documentation.

  Which of the following BEST describes this process?

  A. Deepfake
  B. Know your customer
  C. Identity proofing
  D. Passwordless
  C. Identity proofing

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  Explanation

  https://auth0.com/blog/what-is-identity-proofing-and-why-does-it-matter/

• Question 58:

  A recent DAST scan indicates an application has multiple issues with path traversal.

  Which of the following is the best action for the development team to take?

  A. Develop a secure library for file handling that normalizes and validates the input path.
  B. Create a sandbox for the application that disallows filesystem access.
  C. Ensure that output encoding is appropriately implemented on all data fields.
  D. Implement a blocklist for a specific set of meta characters.
  E. Deploy a code sandbox solution that reduces the application's permissions.
  A. Develop a secure library for file handling that normalizes and validates the input path.

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  Explanation

  Understanding Path Traversal:

  Path traversal vulnerabilities occur when an application improperly handles user input, allowing an attacker to traverse directories on the server and access restricted files.

  Attackers typically use sequences like ../ to move up directory levels, allowing access to critical files such as:

  /etc/passwd (on Linux)

  C:\Windows\system32 (on Windows)

  Example of Vulnerable Code: python CopyEdit

  import os

  def read_file(filename):

  with open("/var/www/app/" + filename, "r") as f: return f.read()

  If the input filename is ../../etc/passwd, the file /etc/passwd might be exposed.

  Why the Correct Answer Is A (Develop a secure library for file handling that normalizes and validates the input path): The most effective defense against path traversal is to sanitize and normalize file paths before processing.

  Techniques include:

  Input validation: Restricting input to expected patterns, such as specific filenames or directories.

  Path normalization: Using functions like os.path.normpath() to collapse redundant separators and up-level references.

  Absolute path verification: Ensuring that the resolved path is within an expected directory.

  Using a secure library for file handling centralizes these practices, reducing the risk of inconsistent or incomplete implementations.

  Example of Secure Implementation: python CopyEdit

  import os def secure_read_file(filename):

  # Normalize and validate the input path safe_base = "/var/www/app/"

  safe_path = os.path.normpath(os.path.join(safe_base, filename))

  # Check if the path starts with the base directory if os.path.commonprefix([safe_base, safe_path]) == safe_base:

  with open(safe_path, "r") as f: return f.read() else:

  raise ValueError("Invalid file path")

  Why the Other Options Are Incorrect:

  Option B. Create a sandbox for the application that disallows filesystem access: Sandboxing is useful for limiting damage but does not directly address the root cause of path traversal. Path traversal can still occur within the sandbox, compromising other files.

  Option C. Ensure that output encoding is appropriately implemented on all data fields: Encoding addresses injection attacks (like XSS), not path traversal. Encoding does not mitigate directory traversal vulnerabilities.

  Option D. Implement a blocklist for a specific set of meta characters: Blocklists are prone to bypass techniques (e.g., using alternative encodings or unexpected separators). A blocklist approach is less reliable compared to whitelisting and path normalization.

  Option E. Deploy a code sandbox solution that reduces the application's permissions: Reducing permissions limits damage but does not prevent traversal attacks. Attackers can still exploit path traversal to access unintended data within permitted areas.

  Real-World Scenario:

  A path traversal vulnerability in a popular CMS allowed attackers to read configuration files and database credentials. The fix involved using safe libraries for file handling and normalizing paths to ensure they were within permitted directories.

  Extract from CompTIA SecurityX CAS-005 Study Guide: The CompTIA SecurityX CAS-005 Official Study Guide recommends the use of secure coding practices for file operations, particularly to prevent path traversal attacks. It emphasizes using path normalization and validation as the primary defense mechanism. By centralizing file handling through a secure library, developers can consistently enforce security measures across the application.

• Question 59:

  An IT administrator is reviewing all the servers in an organization and notices that a server is missing crucial practice against a recent exploit that could gain root access.

  Which of the following describes the administrator's discovery?

  A. A vulnerability
  B. A threat
  C. A breach
  D. A risk
  A. A vulnerability

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  Explanation

  https://www.beyondtrust.com/blog/entry/privilege-escalation-attack-defense-explained

• Question 60:

  A developer wants to maintain integrity to each module of a program and ensure the code cannot be altered by malicious users. Which of the following would be BEST for the developer to perform? (Choose two.)

  A. Utilize code signing by a trusted third party.
  B. Implement certificate-based authentication.
  C. Verify MD5 hashes.
  D. Compress the program with a password.
  E. Encrypt with 3DES.
  F. Make the DACL read-only.
  A. Utilize code signing by a trusted third party.
  C. Verify MD5 hashes.

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  Explanation