ハイパスレートの312-50v13試験問題解説集試験-試験の準備方法-権威のある312-50v13無料試験

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>> 312-50v13試験問題解説集 <<

312-50v13無料試験 & 312-50v13無料模擬試験

我々は弊社の312-50v13問題集を利用するあなたは一発で試験に合格できると信じています。我々はIT業界の権威で専門家たちは数年以来の努力を通して、312-50v13問題集の開発に就職しています。我々の312-50v13問題集を利用してから、あなたは短い時間でリラクスで試験に合格することができるだけでなく、試験に必要な技能を身につけることもできます。

ECCouncil Certified Ethical Hacker Exam (CEHv13) 認定 312-50v13 試験問題 (Q404-Q409):

質問 # 404
Cross-site request forgery involves:

正解：B

解説：
https://owasp.org/www-community/attacks/csrf
Cross-Site Request Forgery (CSRF) is an attack that forces an end user to execute unwanted actions on a web application in which they're currently authenticated. With a little help of social engineering (such as sending a link via email or chat), an attacker may trick the users of a web application into executing actions of the attacker's choosing. If the victim is a normal user, a successful CSRF attack can force the user to perform state changing requests like transferring funds, changing their email address, and so forth. If the victim is an administrative account, CSRF can compromise the entire web application.
CSRF is an attack that tricks the victim into submitting a malicious request. It inherits the identity and privileges of the victim to perform an undesired function on the victim's behalf. For most sites, browser requests automatically include any credentials associated with the site, such as the user's session cookie, IP address, Windows domain credentials, and so forth. Therefore, if the user is currently authenticated to the site, the site will have no way to distinguish between the forged request sent by the victim and a legitimate request sent by the victim.
CSRF attacks target functionality that causes a state change on the server, such as changing the victim's email address or password, or purchasing something. Forcing the victim to retrieve data doesn't benefit an attacker because the attacker doesn't receive the response, the victim does. As such, CSRF attacks target state- changing requests.
It's sometimes possible to store the CSRF attack on the vulnerable site itself. Such vulnerabilities are called
"stored CSRF flaws". This can be accomplished by simply storing an IMG or IFRAME tag in a field that accepts HTML, or by a more complex cross-site scripting attack. If the attack can store a CSRF attack in the site, the severity of the attack is amplified. In particular, the likelihood is increased because the victim is more likely to view the page containing the attack than some random page on the Internet. The likelihood is also increased because the victim is sure to be authenticated to the site already.


質問 # 405
Jane is working as a security professional at CyberSol Inc. She was tasked with ensuring the authentication and integrity of messages being transmitted in the corporate network. To encrypt the messages, she implemented a security model in which every user in the network maintains a ring of public keys. In this model, a user needs to encrypt a message using the receiver's public key, and only the receiver can decrypt the message using their private key. What is the security model implemented by Jane to secure corporate messages?

正解：A

解説：
The scenario describes a decentralized cryptographic trust model where each user maintains a ring or database of public keys, and communications are encrypted using the recipient's public key. This aligns precisely with the Web of Trust (WOT) model.
According to the CEH v13 Official Courseware:
* Web of Trust (WOT) is a decentralized trust model used primarily in PGP (Pretty Good Privacy) environments.
* In WOT:
* Each user maintains a local keyring of trusted public keys.
* There is no central Certificate Authority (CA).
* Trust is built based on mutual verification and endorsement of public keys among users.
* It uses asymmetric cryptography: messages are encrypted using the receiver's public key and decrypted using the corresponding private key.
* This model provides authentication (via digital signatures) and message integrity (via cryptographic hash functions).
Incorrect Options:
* A. Zero Trust Network is a security architecture that enforces strict access control but is not a cryptographic trust model.
* B. TLS (Transport Layer Security) is a protocol for securing data in transit, commonly used in HTTPS, and relies on the PKI trust model (not WOT).
* C. SSL (Secure Socket Layer) is an outdated version of TLS, also based on centralized certificate authorities.
Reference - CEH v13 Official Courseware:
* Module 20: Cryptography
* Section: "Public Key Infrastructure (PKI) and Trust Models"
* Subsection: "Web of Trust (WOT) Model"
* Study Guide Table: Comparison of Trust Models - PKI vs WOT vs Hybrid
Lab references in CEH Engage may also cover key signing and verifying concepts in decentralized environments.


質問 # 406
At a fast-growing startup in Austin, Texas, an ethical hacker is asked to simulate how attackers might gather information to gain initial access. During the assessment, she poses as a recruiter on a professional networking site and convinces several employees to share details about the company's internal software and VPN setup.
Which type of threat best represents this adversary's method of information gathering?

正解：C

解説：
The correct answer is B. Social Engineering because the attacker's primary method is manipulating people- not exploiting a technical vulnerability-to obtain information that can enable initial access. In CEH-aligned security concepts, social engineering is defined by the use of deception, impersonation, and psychological influence to persuade victims to reveal sensitive information, perform actions, or bypass normal security procedures. Here, the ethical hacker "poses as a recruiter" on a professional networking site, which is a classic impersonation / pretexting approach. The goal is to build credibility and trust so employees voluntarily disclose internal details that should not be shared externally.
The information gathered-"internal software and VPN setup"-is exactly the sort of intelligence attackers seek during reconnaissance and pre-attack planning. VPN details, remote access workflows, authentication methods, and internal tooling can be used to craft highly convincing phishing messages, identify weak points (such as outdated clients or exposed portals), or target specific employees and administrators. In a real intrusion, this social engineering-driven intelligence collection often precedes credential harvesting, password spraying, MFA fatigue attempts, or tailored malware delivery.
Why the other options are less correct: System and Network Attacks refer to direct technical exploitation such as scanning, sniffing, or attacking services and protocols; the scenario contains none of that. Information Leakage describes the condition where sensitive data is exposed (for example, public documents, misconfigured repositories, error messages), but the scenario focuses on active interpersonal manipulation to extract information. Corporate Espionage is a broader motive/category describing theft of trade secrets, often by competitors or nation-state actors; while social engineering can be used in espionage, the question asks about the method of information gathering, which is clearly social engineering.
Therefore, the threat method demonstrated is social engineering (pretexting/impersonation via a recruiter persona).


質問 # 407
To create a botnet. the attacker can use several techniques to scan vulnerable machines. The attacker first collects Information about a large number of vulnerable machines to create a list. Subsequently, they infect the machines. The list Is divided by assigning half of the list to the newly compromised machines. The scanning process runs simultaneously. This technique ensures the spreading and installation of malicious code in little time.
Which technique is discussed here?

正解：D

解説：
One of the biggest problems a worm faces in achieving a very fast rate of infection is "getting off the ground." although a worm spreads exponentially throughout the early stages of infection, the time needed to infect say the first 10,000 hosts dominates the infection time.
There is a straightforward way for an active worm a simple this obstacle, that we term hit-list scanning.
Before the worm is free, the worm author collects a listing of say ten,000 to 50,000 potentially vulnerable machines, ideally ones with sensible network connections. The worm, when released onto an initial machine on this hit-list, begins scanning down the list. once it infects a machine, it divides the hit-list in half, communicating half to the recipient worm, keeping the other half.
This fast division ensures that even if only 10-20% of the machines on the hit-list are actually vulnerable, an active worm can quickly bear the hit-list and establish itself on all vulnerable machines in only some seconds.
though the hit-list could begin at 200 kilobytes, it quickly shrinks to nothing during the partitioning. This provides a great benefit in constructing a quick worm by speeding the initial infection.
The hit-list needn't be perfect: a simple list of machines running a selected server sort could serve, though larger accuracy can improve the unfold. The hit-list itself is generated victimization one or many of the following techniques, ready well before, typically with very little concern of detection.
* Stealthy scans. Portscans are so common and then wide ignored that even a quick scan of the whole net would be unlikely to attract law enforcement attention or over gentle comment within the incident response community. However, for attackers wish to be particularly careful, a randomised sneaky scan taking many months would be not possible to attract much attention, as most intrusion detection systems are not currently capable of detecting such low-profile scans. Some portion of the scan would be out of date by the time it had been used, however abundant of it'd not.
* Distributed scanning. an assailant might scan the web using a few dozen to some thousand already- compromised "zombies," the same as what DDOS attackers assemble in a very fairly routine fashion.
Such distributed scanning has already been seen within the wild-Lawrence Berkeley National Laboratory received ten throughout the past year.
* DNS searches. Assemble a list of domains (for example, by using wide offered spam mail lists, or trolling the address registries). The DNS will then be searched for the science addresses of mail-servers (via mx records) or net servers (by looking for www.domain.com).
* Spiders. For net server worms (like Code Red), use Web-crawling techniques the same as search engines so as to produce a list of most Internet-connected web sites. this would be unlikely to draw in serious attention.
* Public surveys. for many potential targets there may be surveys available listing them, like the Netcraft survey.
* Just listen. Some applications, like peer-to-peer networks, wind up advertising many of their servers.
Similarly, many previous worms effectively broadcast that the infected machine is vulnerable to further attack. easy, because of its widespread scanning, during the Code Red I infection it was easy to select up the addresses of upwards of 300,000 vulnerable IIS servers-because each came knock on everyone's door!


質問 # 408
While examining audit logs, you discover that people are able to telnet into the SMTP server on port 25. You would like to block this, though you do not see any evidence of an attack or other wrong doing. However, you are concerned about affecting the normal functionality of the email server. From the following options choose how best you can achieve this objective?

正解：D


質問 # 409
......

312-50v13学習教材は、試験にすばやく合格し、希望する証明書を取得するのに役立ちます。その後、あなたは良い仕事を得るためにもう一つのチップを持っています。 312-50v13学習教材を使用すると、より高い出発点に立って、312-50v13試験に他の人よりも一歩早く合格し、他の人よりも早くチャンスを活用できます。このペースの速い社会では、あなたの時間はとても貴重です。 1人の力だけに頼る場合、あなたが優位に立つことは困難です。 312-50v13の学習に関する質問は、最も満足のいくアシスタントになります。

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