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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Cybersecurity Analyst (CySA+) Certification Exam |
| Exam Number: | CS0-003 |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | Up to 85 |
| Available Languages: | Japanese, Spanish, Portuguese, English |
| Related Certifications: | CompTIA CASP+ CompTIA Network+ CompTIA PenTest+ CompTIA Security+ |
| Exam Price: | $404 USD |
| Exam Duration: | 165 minutes |
| Exam Format: | Performance-based questions, Multiple-choice questions |
| Passing Score: | 750 (scale 100โ900) |
| Recommended Training: | CompTIA Official Training CompTIA CertMaster Learn |
| Exam Registration: | Pearson VUE Exam Registration CompTIA Official Registration |
| Sample Questions: | CompTIA CS0-003 Sample Questions |
| Exam Way: | Online proctored or in-person at Pearson VUE test centers |
| Pre Condition: | Recommended: CompTIA Security+ or equivalent knowledge, plus 3โ4 years of hands-on cybersecurity experience; no mandatory prerequisites |
| Official Syllabus URL: | https://www.comptia.org/certifications/cybersecurity-analyst |
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CompTIA CySA+ certification exam focuses on the development of technical skills required to prevent, detect, and respond to cybersecurity threats. CS0-003 Exam covers a wide range of topics, including threat and vulnerability management, incident response, security operations and monitoring, and compliance and governance. CS0-003 exam requires candidates to demonstrate their knowledge of these topics through multiple-choice questions and performance-based simulations.
The CS0-003 certification exam is an ideal choice for IT professionals who want to advance their careers in the cybersecurity industry. CompTIA Cybersecurity Analyst (CySA+) Certification Exam certification is recognized by leading organizations such as the U.S. Department of Defense, and it is a requirement for many cybersecurity positions in both the public and private sectors. CompTIA Cybersecurity Analyst (CySA+) Certification Exam certification can also help professionals to earn higher salaries and gain recognition for their expertise in the field.
NEW QUESTION # 474
While a security analyst for an organization was reviewing logs from web servers. the analyst found several successful attempts to downgrade HTTPS sessions to use cipher modes of operation susceptible to padding oracle attacks. Which of the following combinations of configuration changes should the organization make to remediate this issue? (Select two).
Answer: B,F
Explanation:
The correct answer is
A) Configure the server to prefer TLS 1.3 and B. Remove cipher suites that use CBC.
A padding oracle attack is a type of attack that exploits the padding validation of a cryptographic message to decrypt the ciphertext without knowing the key. A padding oracle is a system that responds to queries about whether a message has a valid padding or not, such as a web server that returns different error messages for invalid padding or invalid MAC. A padding oracle attack can be applied to the CBC mode of operation, where the attacker can manipulate the ciphertext blocks and use the oracle's responses to recover the plaintext12.
To remediate this issue, the organization should make the following configuration changes:
Configure the server to prefer TLS 1.3. TLS 1.3 is the latest version of the Transport Layer Security protocol, which provides secure communication between clients and servers. TLS 1.3 has several security improvements over previous versions, such as:
It deprecates weak and obsolete cryptographic algorithms, such as RC4, MD5, SHA-1, DES, 3DES, and CBC mode.
It supports only strong and modern cryptographic algorithms, such as AES-GCM, ChaCha20-Poly1305, and SHA-256/384.
It reduces the number of round trips required for the handshake protocol, which improves performance and latency.
It encrypts more parts of the handshake protocol, which enhances privacy and confidentiality.
It introduces a zero round-trip time (0-RTT) mode, which allows resuming previous sessions without additional round trips.
It supports forward secrecy by default, which means that compromising the long-term keys does not affect the security of past sessions3456.
Remove cipher suites that use CBC. Cipher suites are combinations of cryptographic algorithms that specify how TLS connections are secured. Cipher suites that use CBC mode are vulnerable to padding oracle attacks, as well as other attacks such as BEAST and Lucky 13. Therefore, they should be removed from the server's configuration and replaced with cipher suites that use more secure modes of operation, such as GCM or CCM78.
The other options are not effective or necessary to remediate this issue.
Option C is not effective because configuring the server to prefer ephemeral modes for key exchange does not prevent padding oracle attacks. Ephemeral modes for key exchange are methods that generate temporary and random keys for each session, such as Diffie-Hellman or Elliptic Curve Diffie-Hellman. Ephemeral modes provide forward secrecy, which means that compromising the long-term keys does not affect the security of past sessions. However, ephemeral modes do not protect against padding oracle attacks, which exploit the padding validation of the ciphertext rather than the key exchange9.
Option D is not necessary because requiring client browsers to present a user certificate for mutual authentication does not prevent padding oracle attacks. Mutual authentication is a process that verifies the identity of both parties in a communication, such as using certificates or passwords. Mutual authentication enhances security by preventing impersonation or spoofing attacks. However, mutual authentication does not protect against padding oracle attacks, which exploit the padding validation of the ciphertext rather than the authentication.
Option E is not necessary because configuring the server to require HSTS does not prevent padding oracle attacks. HSTS stands for HTTP Strict Transport Security and it is a mechanism that forces browsers to use HTTPS connections instead of HTTP connections when communicating with a web server. HSTS enhances security by preventing downgrade or man-in-the-middle attacks that try to intercept or modify HTTP traffic. However, HSTS does not protect against padding oracle attacks, which exploit the padding validation of HTTPS traffic rather than the protocol.
Option F is not effective because removing cipher suites that use GCM does not prevent padding oracle attacks. GCM stands for Galois/Counter Mode and it is a mode of operation that provides both encryption and authentication for block ciphers, such as AES. GCM is more secure and efficient than CBC mode, as it prevents various types of attacks, such as padding oracle, BEAST, Lucky 13, and IV reuse attacks. Therefore, removing cipher suites that use GCM would reduce security rather than enhance it .
Reference:
1 Padding oracle attack - Wikipedia
2 flast101/padding-oracle-attack-explained - GitHub
3 A Cryptographic Analysis of the TLS 1.3 Handshake Protocol | Journal of Cryptology
4 Which block cipher mode of operation does TLS 1.3 use? - Cryptography Stack Exchange
5 The Essentials of Using an Ephemeral Key Under TLS 1.3
6 Guidelines for the Selection, Configuration, and Use of ... - NIST
7 CBC decryption vulnerability - .NET | Microsoft Learn
8 The Padding Oracle Attack | Robert Heaton
9 What is Ephemeral Diffie-Hellman? | Cloudflare
[10] What is Mutual TLS? How mTLS Authentication Works | Cloudflare
[11] What is HSTS? HTTP Strict Transport Security Explained | Cloudflare
[12] Galois/Counter Mode - Wikipedia
[13] AES-GCM and its IV/nonce value - Cryptography Stack Exchange
NEW QUESTION # 475
Which of the following in the digital forensics process is considered a critical activity that often includes a graphical representation of process and operating system events?
Answer: A
Explanation:
Timeline analysis in digital forensics involves creating a chronological sequence of events based on system logs, file changes, and other forensic data. This process often uses graphical representations to illustrate and analyze how an incident unfolded over time, making it easier to identify key events and potential indicators of compromise. This approach is highlighted in CompTIA Cybersecurity Analyst (CySA+) practices as crucial for understanding the scope and sequence of a security incident. The other options do not involve chronological or graphical analysis to the extent that timeline analysis does.
NEW QUESTION # 476
A web application team notifies a SOC analyst that there are thousands of HTTP/404 events on the public-facing web server. Which of the following is the next step for the analyst to take?
Answer: D
Explanation:
A HTTP/404 error code means that the requested page or resource was not found on the web server. This could be caused by various reasons, such as incorrect URLs, moved or deleted pages, missing assets, or server misconfigurations. The analyst should first identify the source of the requests and examine the related activity to determine if they are legitimate or malicious, and what actions need to be taken to resolve the issue. The other options are either premature or irrelevant without further investigation.
NEW QUESTION # 477
Which of the following describes the reason Zero Trust should be followed on cloud-based architecture designs?
Answer: C
Explanation:
Zero Trust reduces the attack surface by enforcing least-privilege access, continuous verification, and strict segmentation of resources. In cloud environments, this limits the ability of attackers to move laterally or gain broad access if a user account, device, or workload is compromised.
NEW QUESTION # 478
Which of the following is the best technical method to protect sensitive data at an organizational level?
Answer: D
Explanation:
The question asks for the best technical method to protect sensitive data at an organizational level. Among the options, Data Loss Prevention (DLP) is explicitly a technical control category designed to prevent sensitive data leakage/exfiltration across the organization, especially at network boundaries (egress points) and via endpoints.
Why DLP (Option D) is best:
* DLP is built specifically to stop sensitive data from leaving where it should be contained (data exfiltration/leakage prevention) and can be applied broadly across the enterprise (network + endpoints).
The Sybex CySA+ Study Guide defines DLP this way:Exact extract (Sybex Study Guide): "DLP systems and software work to protect data from leaving the organization..."
* DLP is commonly implemented at network egress points (and also endpoints), which aligns directly with "egress and ingress" monitoring in the option wording. The Secbay Press guide reinforces this deployment model:Exact extract (Secbay Press): "Network DLP... Installed at network egress points near the perimeter"
* DLP is also a key technique to help detect/prevent data exfiltration, which is a major concern for sensitive data protection programs:Exact extract (All-in-One Exam Guide): "Implement DLP tools to detect and prevent sensitive data from being transferred outside the organization."
* Finally, DLP is explicitly part of the CS0-003 exam objectives under Sensitive data protection, making it the most "officially aligned" technical method in the answer choices:Exact extract (CompTIA CS0-
003 Objectives): "Sensitive data protection - Data loss prevention (DLP)" Why the other options are not "best":
* A (Block port 8080 / VLAN): Too narrow and mis-scoped. Port-based blocking doesn't reliably stop sensitive data movement (data could leave on 443/HTTPS, email, cloud apps, etc.). Also, "traffic on port 8080 with sensitive information" is not how traffic filtering is normally expressed and isn't an enterprise-wide sensitive data protection strategy.
* B (Python script for email PII): Helpful as a tactical control, but limited to email only, brittle to evasion
/encryption, and not an enterprise-wide standardized control like DLP. (Also corrected typo: "Pll" # PII.)
* C (Restrictive policy): A policy is an administrative/managerial control, not a technical method. The question explicitly asks for the best technical method.
References (CompTIA CySA+ CS0-003 documents / study guides used):
* CompTIA CySA+ CS0-003 Exam Objectives (v4.0): Sensitive data protection includes DLP
* Mike Chapple & David Seidl, CompTIA CySA+ Study Guide (CS0-003): DLP "protect[s] data from leaving the organization..."
* Secbay Press, CompTIA CySA+ Exam Prep Guide (CS0-003): Network DLP at egress points
* Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003): DLP helps "detect and prevent sensitive data" transfer outside
NEW QUESTION # 479
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