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| Section | Objectives |
|---|---|
| Web and Application Security | - Web application hacking techniques |
| Introduction to Ethical Hacking | - Ethical hacking concepts and methodology |
| Reconnaissance Techniques | - Footprinting and information gathering - Scanning networks and enumeration |
| System Hacking | - Malware threats and system exploitation - Gaining access and privilege escalation |
| Wireless and Mobile Security | - Wireless network attacks - Mobile platform vulnerabilities |
| Network Attacks | - Denial of Service (DoS/DDoS) - Sniffing and session hijacking |
| Cloud and IoT Security | - IoT security fundamentals - Cloud computing security concepts |
| Cryptography | - Encryption, hashing, and cryptanalysis |
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質問 # 811
What port number is used by LDAP protocol?
正解：A
質問 # 812
When considering how an attacker may exploit a web server, what is web server footprinting?
正解：C
解説：
Web server footprinting is part of the reconnaissance phase in ethical hacking. It involves gathering detailed information about a web server's structure, external links, available directories, scripts, and technologies in use.
Techniques include:
Spidering the site to map all accessible URLs and file paths
Identifying hidden directories or backup files
Analyzing page structures and URL patterns
This information helps attackers identify areas to target for further scanning or exploitation.
Incorrect Options:
A). Vulnerability scanning is active testing, not passive footprinting.
C). System-level data is gathered in OS or network footprinting.
D). Brute-force attacks are exploitation techniques, not reconnaissance.
Reference - CEH v13 Official Courseware:
Module 02: Footprinting and Reconnaissance
Section: "Web Server Footprinting Techniques"
Tool Reference: HTTrack, Burp Spider, OWASP ZAP
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質問 # 813
A U.S.-based online securities trading firm in New York is reviewing its transaction authentication process.
The security team confirms that each transaction is processed by first generating a hash of the transaction data. The hash value is then signed using the sender's private key.
During verification, the recipient uses the corresponding public key to validate the signature before approving the transaction. The system documentation specifies that the same algorithm supports encryption, digital signatures, and key exchange mechanisms within the organization's secure communications infrastructure.
Which encryption algorithm is being used in this implementation?
正解：A
解説：
The correct answer is C. RSA.
The scenario describes public-key cryptography using a private key to sign a hash and a public key to verify the signature. It also states that the algorithm supports encryption, digital signatures, and key exchange mechanisms. RSA is the best match.
CEH-aligned cryptography material defines RSA as a public-key cryptosystem developed by Rivest, Shamir, and Adleman, and states that RSA encryption is widely used as a de facto encryption standard . Another CEH exam reference explains that RSA can be used for encryption and digital signatures, while Diffie-Hellman is mainly used for key exchange, DSA is for digital signatures, and ElGamal supports encryption and digital signatures but is not the best match for the full requirement stated in the question .
Option A. DSA is incorrect because DSA is designed for digital signatures, not general encryption.
Option B. ElGamal is incorrect because it can support encryption and signatures, but RSA is the stronger CEH-style answer when the question describes encryption, digital signatures, and broad secure communications support.
Option D. Diffie-Hellman is incorrect because Diffie-Hellman is primarily a key exchange protocol and does not provide digital signatures by itself.
Option C. RSA is correct because it supports encryption and digital signatures and is widely used in public- key cryptographic infrastructures.
Therefore, the best answer is C. RSA.
質問 # 814
Bluetooth devices are suspected of being targeted by a Bluesnarfing attack. What is the most effective countermeasure?
正解：D
解説：
Bluesnarfing is a Bluetooth attack described in CEH v13 Wireless Network Hacking, where attackers exploit misconfigured Bluetooth devices to access sensitive data such as contacts, messages, and files-often without user interaction.
One of the most critical enablers of Bluesnarfing is Bluetooth discoverable mode. When devices are discoverable, attackers can easily identify them and attempt unauthorized connections or exploit vulnerabilities in Bluetooth services.
Disabling discoverable mode significantly reduces the attack surface by preventing unauthorized devices from locating Bluetooth-enabled systems. CEH v13 explicitly recommends setting Bluetooth devices to non- discoverable mode when not pairing.
While firmware updates (Option B) are important, they do not immediately prevent discoverability-based attacks. Stronger PINs (Option C) help against pairing attacks but do not stop unauthorized queries. Network- level encryption (Option D) is inherent in Bluetooth protocols and does not mitigate discovery abuse.
CEH v13 highlights that visibility control is the most immediate and effective defense against Bluesnarfing.
Therefore, Option A is the correct answer.
質問 # 815
Calvin, a software developer, uses a feature that helps him auto-generate the content of a web page without manual involvement and is integrated with SSI directives. This leads to a vulnerability in the developed web application as this feature accepts remote user inputs and uses them on the page. Hackers can exploit this feature and pass malicious SSI directives as input values to perform malicious activities such as modifying and erasing server files. What is the type of injection attack Calvin's web application is susceptible to?
正解：A
解説：
The scenario describes an injection attack involving Server Side Includes (SSI). SSI directives are instructions placed in web pages that are executed by the web server before the page is sent to the user. If user input is improperly validated and directly used in an SSI-enabled environment, attackers can inject malicious SSI directives (such as file manipulation commands).
From CEH v13 Official Courseware:
* Server-Side Includes (SSI) Injection occurs when attackers submit specially crafted input that is included in server responses and interpreted as SSI directives.
* These directives can perform dangerous actions like:
* Reading sensitive files (e.g., /etc/passwd)
* Deleting or modifying files
* Running shell commands via #exec directive
Incorrect options:
* A. Server-side template injection is related to template engines like Jinja2 or Twig.
* B. Server-side JS injection applies to environments like Node.js.
* C. CRLF injection manipulates HTTP headers, not SSI parsing.
Reference - CEH v13 Official Courseware:
Module 14: Hacking Web Applications
Section: "Injection Flaws"
Subsection: "SSI Injection"
Lab Reference: CEH iLabs - Web Application Exploitation
質問 # 816
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