[CompTIA] CompTIA - CAS-004 Exam Dumps & Study Guide

Free [CompTIA] CompTIA - CAS-004 Practice Questions Preview

• Question 1

  An organization is referencing NIST best practices for BCP creation while reviewing current internal organizational processes for mission-essential items.
  Which of the following phases establishes the identification and prioritization of critical systems and functions?
  

  • A. Review a recent gap analysis.
  • B. Perform a cost-benefit analysis.
  • C. Conduct a business impact analysis.
  • D. Develop an exposure factor matrix.

  Correct Answer: C

  Explanation:

  I agree with the suggested answer.
  The question asks which phase establishes the identification and prioritization of critical systems and functions in the context of BCP creation, referencing NIST best practices.
  The correct answer is C. Conduct a business impact analysis. A Business Impact Analysis (BIA) is the process of identifying and evaluating the potential effects of an interruption to an organization's critical business functions. It is used to identify and prioritize critical systems and functions.
  Here's why other options are incorrect:

  • A. Review a recent gap analysis: A gap analysis identifies the differences between the desired and actual performance, but it doesn't directly establish the identification and prioritization of critical systems and functions.
  • B. Perform a cost-benefit analysis: A cost-benefit analysis evaluates the costs and benefits of different options, but it doesn't directly establish the identification and prioritization of critical systems and functions.
  • D. Develop an exposure factor matrix: An exposure factor matrix helps to quantify potential losses, but it is a risk assessment tool not specifically focused on identifying and prioritizing critical systems and functions for BCP.

  • NIST Business Impact Analysis, https://csrc.nist.gov/glossary/term/business_impact_analysis

• Question 2

  An organization is preparing to migrate its production environment systems from an on-premises environment to a cloud service. The lead security architect is concerned that the organization's current methods for addressing risk may not be possible in the cloud environment.
  Which of the following BEST describes the reason why traditional methods of addressing risk may not be possible in the cloud?
  

  • A. Migrating operations assumes the acceptance of all risk.
  • B. Cloud providers are unable to avoid risk.
  • C. Specific risks cannot be transferred to the cloud provider.
  • D. Risks to data in the cloud cannot be mitigated.

  Correct Answer: C

  Explanation:

  I agree with the suggested answer, which is C. Specific risks cannot be transferred to the cloud provider.
  
  Reasoning:
  The core issue here is the shared responsibility model in cloud computing. While cloud providers handle the security *of* the cloud (physical infrastructure, network, etc.), the customer is responsible for security *in* the cloud (data, applications, identity and access management, etc.). This means that certain risks associated with the customer's data, applications, and configurations cannot be fully transferred to the cloud provider. Traditional risk management methods often assume complete control, which is not the case in a cloud environment due to this shared responsibility.
  
  Here's a breakdown of why the other options are less accurate:
  * **A. Migrating operations assumes the acceptance of all risk:** This is incorrect. Organizations should not blindly accept all risks when migrating to the cloud. Risk assessments and appropriate security measures are still necessary.
  * **B. Cloud providers are unable to avoid risk:** This is also incorrect. Cloud providers invest heavily in security measures to avoid many risks related to the infrastructure they manage. They implement security controls to protect their infrastructure, and their services.
  * **D. Risks to data in the cloud cannot be mitigated:** This statement is false. There are numerous ways to mitigate risks to data in the cloud, such as encryption, access control, data loss prevention (DLP) measures, and regular backups. The customer is responsible to mitigate the risk of their data.
  
  The shared responsibility model is a fundamental concept in cloud security, making option C the most accurate answer.

  
  Citations:

  • Shared Responsibility Model, https://www.trendmicro.com/en_us/research/23/a/understanding-the-shared-responsibility-model-in-cloud-security.html

• Question 3

  A company created an external application for its customers. A security researcher now reports that the application has a serious LDAP injection vulnerability that could be leveraged to bypass authentication and authorization.
  Which of the following actions would BEST resolve the issue? (Choose two.)
  

  • A. Conduct input sanitization.
  • B. Deploy a SIEM.
  • C. Use containers.
  • D. Patch the OS
  • E. Deploy a WAF.
  • F. Deploy a reverse proxy
  • G. Deploy an IDS.

  Correct Answer: AE

  Explanation:

  I agree with the suggested answer of A and E.
  
  Reasoning: The question describes an LDAP injection vulnerability. The best ways to address this are to prevent the injection from occurring in the first place and to provide a layer of defense that can identify and block malicious requests. Input sanitization and a WAF directly address the LDAP injection issue.
  

  • Input Sanitization (A): This involves validating and cleaning user inputs to prevent malicious code from being injected into the LDAP query. By sanitizing input, the application can ensure that only valid data is passed to the LDAP server, mitigating the risk of injection attacks.
  • Web Application Firewall (WAF) (E): A WAF can detect and block suspicious requests, including those attempting LDAP injection. It analyzes HTTP traffic and applies rules to identify and prevent common web application attacks. A WAF acts as an additional layer of defense, protecting the application even if vulnerabilities exist in the code.

  Reasons for not choosing the other options:

  • Deploy a SIEM (B): A SIEM (Security Information and Event Management) system is primarily used for monitoring and analyzing security events. While a SIEM might detect suspicious activity related to an LDAP injection attempt, it does not prevent the injection from occurring in the first place. It's a detective control, not a preventative one.
  • Use containers (C): Using containers can help isolate applications and improve security, but it doesn't directly address the LDAP injection vulnerability. Containers can limit the impact of a successful attack, but they don't prevent the attack from happening.
  • Patch the OS (D): Patching the OS is essential for maintaining overall system security, but it's not a direct solution for an LDAP injection vulnerability in an application. While OS patches can address underlying security issues, they won't specifically mitigate LDAP injection attacks.
  • Deploy a reverse proxy (F): A reverse proxy primarily helps with load balancing, caching, and security by hiding the internal infrastructure. While it can provide some level of protection, it doesn't directly address LDAP injection vulnerabilities like input sanitization or a WAF.
  • Deploy an IDS (G): An Intrusion Detection System (IDS) is designed to detect malicious activity on a network or system. Like a SIEM, it's a detective control. While it can alert administrators to a potential LDAP injection attack, it doesn't prevent the attack from succeeding.

  Suggested Answer: AE

  
  Citations:

  • OWASP on LDAP Injection, https://owasp.org/www-community/attacks/LDAP_Injection
  • Imperva on Web Application Firewalls, https://www.imperva.com/learn/application-security/web-application-firewall-waf/

• Question 4

  In preparation for the holiday season, a company redesigned the system that manages retail sales and moved it to a cloud service provider. The new infrastructure did not meet the company's availability requirements. During a postmortem analysis, the following issues were highlighted:
  1. International users reported latency when images on the web page were initially loading.
  2. During times of report processing, users reported issues with inventory when attempting to place orders.
  3. Despite the fact that ten new API servers were added, the load across servers was heavy at peak times.
  Which of the following infrastructure design changes would be BEST for the organization to implement to avoid these issues in the future?
  

  • A. Serve static content via distributed CDNs, create a read replica of the central database and pull reports from there, and auto-scale API servers based on performance.
  • B. Increase the bandwidth for the server that delivers images, use a CDN, change the database to a non-relational database, and split the ten API servers across two load balancers.
  • C. Serve images from an object storage bucket with infrequent read times, replicate the database across different regions, and dynamically create API servers based on load.
  • D. Serve static-content object storage across different regions, increase the instance size on the managed relational database, and distribute the ten API servers across multiple regions.

  Correct Answer: A

  Explanation:

  I agree with the suggested answer A.
  Reasoning:
  Option A provides the most comprehensive solution to the issues highlighted in the question. Let's break down why:

  • "Serve static content via distributed CDNs": This directly addresses the latency issue reported by international users when loading images. CDNs (Content Delivery Networks) store copies of static content (like images) on servers located in various geographic locations. When a user requests the content, it's served from the server closest to them, reducing latency.
  • "Create a read replica of the central database and pull reports from there": This addresses the inventory issues reported during report processing. Creating a read replica allows reports to be generated from the replica without impacting the performance of the primary database, which is responsible for handling order placements.
  • "Auto-scale API servers based on performance": This addresses the heavy load on API servers during peak times. Auto-scaling ensures that the number of API servers automatically adjusts based on the current demand. This dynamically allocates resources to handle peak loads, preventing performance degradation.

  Reasons for not choosing the other options:

  • Option B: While it suggests using a CDN (which is good), simply increasing bandwidth may not be sufficient to address latency issues for geographically distant users. Changing to a non-relational database might be a significant architectural change and may not be necessary to solve the identified problems. Splitting API servers across two load balancers doesn't guarantee optimal resource allocation or address scaling needs as effectively as auto-scaling.
  • Option C: Using object storage with infrequent read times for images is counterintuitive, as images on a retail website are accessed frequently. While replicating the database across different regions could improve availability, it doesn't specifically address the reporting load issue as effectively as a read replica. Dynamically creating API servers based on load is similar to auto-scaling but might not be as efficient or cost-effective as a managed auto-scaling solution.
  • Option D: Serving static content from object storage across different regions is a good approach for availability, but it's not as efficient as using a CDN for reducing latency. Increasing the instance size on the managed relational database might help with performance, but it's a vertical scaling approach that may not be as cost-effective or scalable as using a read replica for reporting. Distributing the ten API servers across multiple regions could add complexity and may not be as efficient as auto-scaling within a single region.

  Therefore, option A provides the best combination of solutions to address all the identified issues in a scalable and cost-effective manner.

  • Content delivery network, https://www.cloudflare.com/learning/cdn/what-is-a-cdn/
  • Database replication, https://aws.amazon.com/rds/replication/
  • Autoscaling, https://aws.amazon.com/autoscaling/

• Question 5

  During a remodel, a company's computer equipment was moved to a secure storage room with cameras positioned on both sides of the door. The door is locked using a card reader issued by the security team, and only the security team and department managers have access to the room. The company wants to be able to identify any unauthorized individuals who enter the storage room by following an authorized employee.
  Which of the following processes would BEST satisfy this requirement?
  

  • A. Monitor camera footage corresponding to a valid access request.
  • B. Require both security and management to open the door.
  • C. Require department managers to review denied-access requests.
  • D. Issue new entry badges on a weekly basis.

  Correct Answer: A

  Explanation:

  I agree with the suggested answer of A.
  Reasoning: The question explicitly asks for a process to "identify any unauthorized individuals who enter the storage room by following an authorized employee." Monitoring camera footage corresponding to a valid access request directly addresses this requirement. By reviewing the footage when an authorized employee enters, security personnel can observe whether anyone is tailgating or otherwise gaining unauthorized access. This allows for the identification of unauthorized individuals, which aligns with the primary goal stated in the question.
  Reasons for not choosing other answers:

  • B. Require both security and management to open the door: This option focuses on access control and prevention, not identification. While it may reduce the likelihood of unauthorized access, it doesn't help in identifying individuals who might still manage to follow an authorized employee. The question is asking about what is the BEST method to 'identify' unauthorized access.
  • C. Require department managers to review denied-access requests: This option focuses on analyzing failed access attempts, which doesn't directly address the scenario of unauthorized individuals following authorized employees. Denied access requests would not capture instances of tailgating.
  • D. Issue new entry badges on a weekly basis: This option is primarily for managing lost or compromised badges and does not directly address the problem of identifying individuals who follow authorized employees. It's a preventative measure against stolen badges, not a detective one for tailgating.

  Citations:

  • CAS-004 Exam Objectives, https://certification.comptia.org/docs/default-source/exam-objectives/cs0-003_comptia_cysec+_exam_objectives.pdf

• Question 6

  A company is preparing to deploy a global service.
  Which of the following must the company do to ensure GDPR compliance? (Choose two.)
  

  • A. Inform users regarding what data is stored.
  • B. Provide opt-in/out for marketing messages.
  • C. Provide data deletion capabilities.
  • D. Provide optional data encryption.
  • E. Grant data access to third parties.
  • F. Provide alternative authentication techniques.

  Correct Answer: AC

  Explanation:

  I agree with the suggested answer of AC.
  Reasoning: GDPR (General Data Protection Regulation) mandates specific requirements for organizations processing the personal data of individuals within the European Union (EU). Options A and C directly align with these requirements.

  • Option A (Inform users regarding what data is stored): GDPR emphasizes transparency. Organizations must inform users about what personal data they collect, how it's used, and the purpose of processing. This is a fundamental aspect of GDPR compliance, ensuring individuals are aware of how their data is being handled.
  • Option C (Provide data deletion capabilities): GDPR grants individuals the "right to be forgotten," also known as the right to erasure. This means individuals have the right to request the deletion of their personal data when there is no compelling reason for its continued processing. Organizations must provide mechanisms for users to exercise this right.

  Reasons for not choosing the other options:

  • Option B (Provide opt-in/out for marketing messages): While providing opt-in/out for marketing messages is a good practice and often required by e-privacy regulations (which often work in conjunction with GDPR), GDPR itself doesn't explicitly mandate this. GDPR focuses more on the lawful basis for processing data, and consent is only one of those bases. Other bases like legitimate interest might allow marketing without explicit opt-in, though this must be carefully balanced.
  • Option D (Provide optional data encryption): While data encryption is a recommended security measure, GDPR doesn't mandate *optional* encryption. GDPR Article 32 requires implementing appropriate technical and organizational measures to ensure a level of security appropriate to the risk, including encryption where appropriate. The choice isn't optional if the risk assessment dictates it.
  • Option E (Grant data access to third parties): GDPR does not require granting data access to all third parties. Instead, it regulates the transfer of data to third parties and requires appropriate safeguards to be in place. Access should only be granted when there is a legitimate and lawful basis for doing so.
  • Option F (Provide alternative authentication techniques): While providing robust authentication is a good security practice, GDPR doesn't specifically require alternative authentication techniques. The focus is on securing personal data, and authentication is just one aspect of that security.

  
  Citations:

  • GDPR Official Website, https://gdpr-info.eu/

• Question 7

  A SOC analyst is reviewing malicious activity on an external, exposed web server. During the investigation, the analyst determines specific traffic is not being logged, and there is no visibility from the WAF for the web application.
  Which of the following is the MOST likely cause?
  

  • A. The user agent client is not compatible with the WAF.
  • B. A certificate on the WAF is expired.
  • C. HTTP traffic is not forwarding to HTTPS to decrypt.
  • D. Old, vulnerable cipher suites are still being used.

  Correct Answer: C

  Explanation:

  Based on my analysis of the question and the discussion, I disagree with the suggested answer. The most likely cause is B. A certificate on the WAF is expired.
  
  Reasoning:
  An expired certificate on the WAF would prevent the SSL/TLS handshake from completing successfully. If the handshake fails, the client may not be able to establish a secure connection with the web server. Consequently, no traffic would reach the WAF, leading to an absence of logs. This scenario aligns perfectly with the problem description, where the analyst detects specific traffic which is not logged and also finds no visibility from the WAF.
  
  Reasons for not choosing other options:
  

  • A. The user agent client is not compatible with the WAF: While incompatibility could cause issues, it would likely result in connection errors rather than a complete lack of logging for specific traffic. The WAF should still register an attempt to connect, even if it is ultimately rejected due to incompatibility.
  • C. HTTP traffic is not forwarding to HTTPS to decrypt: The question mentions that the traffic is malicious activity on an external, exposed web server. If the web server were only configured to receive HTTP traffic, the WAF would still be able to inspect that traffic. The issue here is not the lack of forwarding but potentially the lack of encryption. However, this option's logic of "decrypting HTTP to HTTPS" is flawed, as HTTP is not decrypted to HTTPS; HTTPS is encrypted.
  • D. Old, vulnerable cipher suites are still being used: While using old cipher suites is a security risk, it would likely result in connection errors or the downgrading of encryption rather than a complete absence of logging. A WAF would typically still log attempts to use these suites, even if it eventually rejects them.

  The consensus from the discussion also leaned towards option B being the most probable.

• Question 8

  A security analyst is reviewing the following output:
  
  Which of the following would BEST mitigate this type of attack?
  

  • A. Installing a network firewall
  • B. Placing a WAF inline
  • C. Implementing an IDS
  • D. Deploying a honeypot

  Correct Answer: B

  Explanation:

  I agree with the suggested answer.
  B. Placing a WAF inline is the best option because a Web Application Firewall (WAF) is specifically designed to protect web applications by filtering and monitoring HTTP/HTTPS traffic between a web application and the Internet. The provided output indicates a directory traversal attack, which attempts to access restricted directories and execute unauthorized commands. A WAF can identify and block such malicious requests by inspecting the HTTP headers and body for patterns indicative of directory traversal attempts.
  
  Here's a detailed explanation of why the other options are not as effective:

  • A. Installing a network firewall: While a firewall is essential for network security, it operates at a lower layer (Layer 3/4) and primarily filters traffic based on IP addresses, ports, and protocols. It is not designed to inspect the content of HTTP requests and therefore would likely not detect a directory traversal attack.
  • C. Implementing an IDS: An Intrusion Detection System (IDS) can detect malicious activity based on signatures and anomalies, but it typically does not actively block traffic. It primarily provides alerts, requiring manual intervention to respond to the attack. While helpful, it isn't as proactive a solution as a WAF. Also, an IDS might not have the specific rules to detect all forms of directory traversal attempts without significant tuning.
  • D. Deploying a honeypot: A honeypot is a decoy system designed to attract attackers and gather information about their techniques. While useful for threat intelligence, it does not directly prevent or mitigate the directory traversal attack against the actual web application.

  Therefore, placing a WAF inline is the most effective measure to mitigate the directory traversal attack illustrated in the output.

  Citations:

  • Web Application Firewall (WAF), https://www.cloudflare.com/learning/cloud-security/what-is-a-web-application-firewall-waf/
  • Directory Traversal, https://owasp.org/www-community/attacks/Path_Traversal

• Question 9

  Which of the following terms refers to the delivery of encryption keys to a CASB or a third-party entity?
  

  • A. Key sharing
  • B. Key distribution
  • C. Key recovery
  • D. Key escrow

  Correct Answer: B

  Explanation:

  I agree with the suggested answer.
  Key distribution is the correct answer. The question specifically asks about the *delivery* of encryption keys to a CASB or third-party entity, which aligns directly with the definition of key distribution.
  Here's a breakdown of why the other options are less suitable:

  • **Key sharing**: While key sharing does involve making a key accessible, the term doesn't specifically address the *delivery* aspect emphasized in the question. It is a broader term.
  • **Key recovery**: Key recovery refers to the process of retrieving a lost or corrupted key, which is not relevant to the initial delivery of keys to a CASB.
  • **Key escrow**: Key escrow involves storing a copy of the encryption key with a trusted third party. While it can be associated with CASBs, the primary function is storage for later retrieval under specific circumstances, not the initial delivery for immediate use.

  • Key Distribution: https://www.ibm.com/docs/en/ztpf/2021?topic=security-key-distribution

• Question 10

  An organization is implementing a new identity and access management architecture with the following objectives:
  ✑ Supporting MFA against on-premises infrastructure
  ✑ Improving the user experience by integrating with SaaS applications
  ✑ Applying risk-based policies based on location
  ✑ Performing just-in-time provisioning
  Which of the following authentication protocols should the organization implement to support these requirements?
  

  • A. Kerberos and TACACS
  • B. SAML and RADIUS
  • C. OAuth and OpenID
  • D. OTP and 802.1X

  Correct Answer: C

  Explanation:

  I agree with the suggested answer of C. OAuth and OpenID.
  
  Reasoning:
  OAuth and OpenID Connect (OIDC) are modern authentication and authorization protocols that directly address the requirements outlined in the question.

  • MFA against on-premises infrastructure and Improving user experience by integrating with SaaS applications: OIDC supports MFA and is widely adopted by SaaS providers, which will improve user experience by enabling single sign-on (SSO) and reducing the number of credentials users must manage.
  • Applying risk-based policies based on location: OpenID Connect can be extended with additional claims and context to enforce risk-based policies, including location-based access control.
  • Performing just-in-time provisioning: OIDC supports dynamic user registration and just-in-time (JIT) provisioning, which automatically creates user accounts when they first authenticate.

  
  Reasons for not choosing the other options:

  • A. Kerberos and TACACS: Kerberos is primarily used for authenticating users within a domain environment and is not well-suited for SaaS applications. TACACS+ is typically used for network device administration. Neither protocol directly supports risk-based policies based on location or JIT provisioning in the context described.
  • B. SAML and RADIUS: SAML can be used for SSO with SaaS applications, but RADIUS is mainly for network access authentication and does not directly address the requirements for SaaS integration, risk-based policies based on location, or JIT provisioning in a comprehensive manner.
  • D. OTP and 802.1X: OTP (One-Time Password) is a method for MFA but not a complete authentication protocol. 802.1X is used for network access control, particularly in wired and wireless networks, and does not support SaaS integration, risk-based policies, or JIT provisioning.

  
  

  Suggested Answer: C

  
  

  Citations:

  • OAuth 2.0, https://oauth.net/2/
  • OpenID Connect, https://openid.net/connect/