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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Operations | 33% | - Security monitoring concepts and tools
|
| Topic 2: Incident Response Management | 20% | - Digital forensics basics
|
| Topic 3: Reporting and Communication | 17% | - Reporting requirements and standards
|
| Topic 4: Vulnerability Management | 30% | - Risk assessment and mitigation
|
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NEW QUESTION # 270
The most recent vulnerability scan results show the following
The vulnerability team learned the following from the asset owners:
* Server hqfinoi is a financial transaction database server used in the company ' s largest business unit.
* Server hqadmin02 is utilized by an end user with administrator privileges to several critical applications.
* No compensating controls exist for either issue.
Which of the following would the vulnerability team most likely do to determine remediation prioritization?
Answer: C
Explanation:
When two vulnerabilities are both high severity (CVSS 8.1 and 8.5 ) and no compensating controls exist, the deciding factor for remediation prioritization becomes business impact and asset criticality/value (what matters most to the organization if compromised or taken offline for remediation).
That is exactly what a Business Impact Analysis (BIA) is used for: it is a formalized method to determine asset criticality/value designations and to prioritize response/remediation work based on business impact.
Supporting exact extracts:
* The Secbay Press CS0-003 guide explicitly states that Business Impact Analysis is used to align vulnerability prioritization with critical business functions: Exact extract (Secbay Press): " Business Impact Analysis: ... Considers the potential impact of vulnerabilities on critical business functions
... prioritizing vulnerabilities that could impact core business processes."
* It also describes the vulnerability prioritization process as combining severity/exploitability with asset criticality assessment (which is informed by business owners and BIA outputs): Exact extract (Secbay Press): " Asset Criticality Assessment: Evaluate the criticality of assets affected... Consider the importance of assets in business operations, data sensitivity, and regulatory compliance."
* The All-in-One CS0-003 guide reinforces that asset value (sensitivity + criticality) is one of the most important drivers of remediation timing/prioritization: Exact extract (All-in-One Exam Guide): " Asset value is... one of the most important factors in determining how quickly you should remediate vulnerabilities ..." and asset value is tied to " sensitivity and criticality ." Applying this to the scenario
* HQFIN01 supports financial transactions for the largest business unit # typically extremely high criticality (availability) and often high sensitivity/integrity requirements.
* HQADMIN02 is used by a privileged user and could be high risk too (admin access), but the question asks what the team would do to determine prioritization: the correct step is to reference BIA/value designation and then prioritize based on which asset is more critical to business operations .
Why the other options are incorrect
* A (Review BCP and patch what takes longer to bring online): BCP/DR planning is not the primary method for vulnerability remediation ranking; prioritization is risk-based and commonly driven by asset criticality/business impact (BIA), not "time to bring online."
* B (Fix the faster one first): Speed of remediation is not the main driver; risk reduction and business impact are.
* D (Least recent backups): Backup recency matters for recovery and resilience, but it's not the primary determinant for vulnerability remediation priority versus asset criticality and business impact.
References (CompTIA CySA+ CS0-003 documents / study guides used):
* Secbay Press, CompTIA CySA+ Exam Prep Guide (CS0-003) : BIA used to prioritize vulnerabilities impacting critical business functions; asset criticality assessment in prioritization process
* Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003) : asset value (sensitivity + criticality) drives how quickly vulnerabilities should be remediated
NEW QUESTION # 271
An XSS vulnerability was reported on one of the public websites of a company. The security department confirmed the finding and needs to provide a recommendation to the application owner. Which of the following recommendations will best prevent this vulnerability from being exploited? (Select two).
Answer: B,F
Explanation:
Comprehensive Detailed
To effectively prevent Cross-Site Scripting (XSS) attacks, implementing appropriate security controls within the application code and at the network layer is critical. Here's a breakdown of each option:
A . Implement an IPS in front of the web server
Intrusion Prevention Systems (IPS) are primarily designed to detect and prevent network-based attacks, not application-layer vulnerabilities such as XSS. They do not specifically mitigate XSS threats effectively.
B . Enable MFA on the website
Multi-factor authentication (MFA) strengthens user authentication but does not address XSS, which typically involves injecting malicious scripts rather than compromising user credentials.
C . Take the website offline until it is patched
While this might temporarily mitigate the risk, it is not a practical solution for ongoing operations, especially when effective preventative controls (e.g., WAF rules or code updates) can be implemented without disabling the service.
D . Implement a compensating control in the source code
Implementing security controls at the code level is an effective way to mitigate XSS risks. This can involve proper input validation, output encoding, and utilizing libraries that sanitize user inputs. By addressing the root cause in the source code, developers prevent scripts from being injected or executed in the browser.
E . Configure TLS v1.3 on the website
While TLS v1.3 secures the communication channel, it does not address XSS directly. XSS attacks manipulate client-side scripts, which TLS cannot prevent, as TLS only encrypts data in transit.
F . Fix the vulnerability using a virtual patch at the WAF
Web Application Firewalls (WAFs) can mitigate XSS vulnerabilities by identifying and blocking malicious payloads. Virtual patching at the WAF level provides a temporary fix by preventing exploit attempts from reaching the application, giving developers time to implement a permanent fix in the source code.
Reference:
OWASP XSS Prevention Cheat Sheet: Detailed guidance on encoding, sanitizing, and safe coding practices to prevent XSS.
NIST SP 800-44: Guidelines on Web Security, discussing WAFs and application-layer protections.
CWE-79: Common Weakness Enumeration on Cross-Site Scripting, which outlines ways to address and prevent XSS attacks.
NEW QUESTION # 272
After an upgrade to a new EDR, a security analyst received reports that several endpoints were not communicating with the SaaS provider to receive critical threat signatures. To comply with the incident response playbook, the security analyst was required to validate connectivity to ensure communications. The security analyst ran a command that provided the following output:
* ComputerName: comptia007
* RemotePort: 443
* InterfaceAlias: Ethernet 3
* TcpTestSucceeded: False
Which of the following did the analyst use to ensure connectivity?
Answer: C
Explanation:
Comprehensive Detailed Explanation:The command output shown indicates that the analyst used a TCP connection test to check if communication on port 443 (usually HTTPS) succeeded. Here's why each option was or was not suitable:
* A. nmap: While nmap can scan ports, it does not provide direct feedback on connection success or failure in the manner shown.
* B. tnc (Test-NetConnection in PowerShell): This command in PowerShell is specifically designed to test connectivity to a specified port and IP address. The output (TcpTestSucceeded: False) is characteristic of the tnc command.
* C. ping: The ping command only tests ICMP echo replies and does not indicate success or failure on specific ports.
* D. tracert: tracert traces the path packets take to reach a host but does not provide a direct indication of port availability or success.
NEW QUESTION # 273
A security analyst has found the following suspicious DNS traffic while analyzing a packet capture:
* DNS traffic while a tunneling session is active.
* The mean time between queries is less than one second.
* The average query length exceeds 100 characters.
Which of the following attacks most likely occurred?
Answer: B
Explanation:
Explanation
DNS exfiltration is a technique that uses the DNS protocol to transfer data from a compromised network or device to an attacker-controlled server. DNS exfiltration can bypass firewall rules and security products that do not inspect DNS traffic. The characteristics of the suspicious DNS traffic in the question match the indicators of DNS exfiltration, such as:
DNS traffic while a tunneling session is active: This implies that the DNS protocol is being used to create a covert channel for data transfer.
The mean time between queries is less than one second: This implies that the DNS queries are being sent at a high frequency to maximize the amount of data transferred.
The average query length exceeds 100 characters: This implies that the DNS queries are encoding large amounts of data in the subdomains or other fields of the DNS packets.
Official References:
https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectives
https://resources.infosecinstitute.com/topic/bypassing-security-products-via-dns-data-exfiltration/
https://www.reddit.com/r/CompTIA/comments/nvjuzt/dns_exfiltration_explanation/
NEW QUESTION # 274
An MSSP received several alerts from customer 1, which caused a missed incident response deadline for customer 2. Which of the following best describes the document that was violated?
Answer: B
NEW QUESTION # 275
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