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| Section | Objectives |
|---|---|
| Reconnaissance Techniques | - Scanning networks and enumeration - Footprinting and information gathering |
| System Hacking | - Malware threats and system exploitation - Gaining access and privilege escalation |
| Cloud and IoT Security | - Cloud computing security concepts - IoT security fundamentals |
| Introduction to Ethical Hacking | - Ethical hacking concepts and methodology |
| Wireless and Mobile Security | - Mobile platform vulnerabilities - Wireless network attacks |
| Network Attacks | - Sniffing and session hijacking - Denial of Service (DoS/DDoS) |
| Cryptography | - Encryption, hashing, and cryptanalysis |
| Web and Application Security | - Web application hacking techniques |
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NEW QUESTION # 755
Calvin, a grey-hat hacker, targets a web application that has design flaws in its authentication mechanism. He enumerates usernames from the login form of the web application, which requests users to feed data and specifies the incorrect field in case of invalid credentials. Later, Calvin uses this information to perform social engineering.
Which of the following design flaws in the authentication mechanism is exploited by Calvin?
Answer: A
Explanation:
Verbose failure messages are detailed error messages that reveal too much information about authentication failures. In the described scenario, the web application specifies whether the username or password is incorrect. This behavior enables attackers to:
Enumerate valid usernames by submitting random inputs and observing which error message is returned.
Use the valid usernames to conduct targeted attacks such as brute-force attempts or social engineering.
According to CEH v13:
Authentication mechanisms should provide generic error messages such as "Invalid username or password" to avoid exposing system behavior.
Verbose error messages violate the principle of "fail securely."
Incorrect Options:
A). Insecure transmission relates to credentials being sent over unencrypted channels (e.g., HTTP instead of HTTPS).
C). User impersonation involves taking on the identity of another user, not enumeration.
D). Password reset mechanisms are a different component of authentication, not mentioned in this context.
Reference - CEH v13 Official Courseware:
Module 14: Hacking Web Applications
Section: "Authentication Bypass Techniques"
Subsection: "Enumeration via Verbose Error Messages"
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NEW QUESTION # 756
A security consultant is conducting an authorized assessment for a healthcare billing provider in Phoenix, Arizona. While monitoring internal traffic, he observes an authenticated employee interacting with a sensitive web-based management portal over TCP.
During the session, the consultant carefully crafts and injects packets into the ongoing communication stream.
Shortly afterward, the legitimate user experiences irregular responses from the application, and the server begins processing commands originating from the consultant's injected traffic as though they were part of the established session.
The technique does not involve credential guessing or forcing the user to reauthenticate. Instead, it targets the communication channel already in progress.
From a network-level perspective, what type of session hijacking technique is being demonstrated?
Answer: B
Explanation:
The correct answer is D. TCP/IP Hijacking.
The scenario describes an attacker targeting an already established TCP session and injecting crafted packets into the communication stream. CEH-aligned material describes TCP/IP hijacking as a network-level attack on a TCP session in which the attacker predicts or uses sequence-number information and injects spoofed packets into the session. It also explains that sniffing tools may be used to capture packets and extract sequence-number information before injecting spoofed traffic .
Option A. UDP Hijacking is incorrect because the scenario specifically involves TCP communication, not UDP.
Option B. RST Hijacking is incorrect because RST hijacking involves sending spoofed reset packets to terminate or reset a TCP connection, not taking over the session to issue commands.
Option C. Blind Hijacking is incorrect because blind hijacking occurs when the attacker cannot capture return traffic. In this scenario, the consultant is monitoring internal traffic and injecting into the observed session.
Option D. TCP/IP Hijacking is correct because the consultant is manipulating an active TCP communication channel and injecting packets as part of the established session.
Therefore, the best answer is D. TCP/IP Hijacking.
NEW QUESTION # 757
In the neon-lit sprawl of Las Vegas, Nevada, a luxury hotel's smart room control system suffered a breach, allowing an intruder to manipulate guest room settings. The incident investigation revealed that the IoT devices lacked any mechanism to verify the integrity or authenticity of software prior to execution, allowing tampered instructions to run unchecked. As Emna Ruza, a cybersecurity consultant brought in to assess the breach, you recommend a solution that ensures only authorized, validated code is executed on the devices.
Which secure development practice are you advising the hotel to implement?
Answer: A
Explanation:
The core weakness described is that the IoT devices "lack any mechanism to verify the integrity or authenticity of software prior to execution," which directly maps to the need for code signing. In CEH-aligned IoT security guidance, code signing ensures that firmware and software images are cryptographically signed by a trusted authority and verified on the device before they are installed or executed. This verification confirms two critical properties: integrity, meaning the code has not been altered or tampered with, and authenticity, meaning the code genuinely originated from an authorized publisher. If an attacker attempts to introduce modified binaries or malicious instructions, signature verification fails and the device can reject execution, preventing unauthorized code from running.
While secure boot is closely related, it is specifically a boot-time chain-of-trust mechanism that verifies the bootloader and early-stage firmware during startup. The question, however, emphasizes a general lack of verification "prior to execution," which is broader than boot only and is most directly addressed by code signing as a secure development and release practice. Secure firmware or software updates is also important, but secure updates typically rely on code signing as the fundamental control that makes updates trustworthy.
Secure communication protocols protect data in transit, but they do not stop tampered code already on the device from executing.
Therefore, the most appropriate secure development practice to ensure only authorized, validated code runs on the devices is to implement code signing with mandatory signature verification.
NEW QUESTION # 758
Which individuals believe that hacking and defacing websites can promote social change?
Answer: A
Explanation:
The correct answer is B, Hacktivists. In CEH hacker-classification concepts, hacktivists are attackers who use hacking techniques to support a social, religious, ideological, or political cause. CEH-aligned material describes hacktivism as actions intended to put forward a cause or political agenda, affect societal change, or highlight perceived political injustice. Another CEH-aligned explanation states that these individuals may hack servers, deface websites, create viruses, and cause disruption because they believe their actions will force social change or bring attention to an issue. Gray hat hackers may reveal vulnerabilities without permission, but their primary motivation is not necessarily social change. Ethical hackers, or white hats, work defensively with authorization and prior consent, not through illegal defacement. Black hat hackers usually act for malicious intent, personal gain, data theft, or service disruption. Therefore, the group specifically associated with hacking and website defacement to promote social or political change is Hacktivists.
NEW QUESTION # 759
You are the chief cybersecurity officer at CloudSecure Inc., and your team is responsible for securing a cloudbased application that handles sensitive customer data. To ensure that the data is protected from breaches, you have decided to implement encryption for both data-at-rest and data-in-transit. The development team suggests using SSL/TLS for securing data in transit. However, you want to also implement a mechanism to detect if the data was tampered with during transmission. Which of the following should you propose?
Answer: C
Explanation:
SSL/TLS is a protocol that provides encryption and authentication for data in transit between a client and a server. However, SSL/TLS does not provide any protection against data tampering, which is the alteration, deletion, or insertion of data without authorization or proper validation. Data tampering can compromise the integrity and accuracy of the data, and potentially lead to breaches or fraud. To detect and prevent data tampering, you should implement IPsec in addition to SSL/TLS. IPsec is a protocol that provides encryption, authentication, and integrity for data in transit at the network layer. IPsec uses cryptographic mechanisms, such as digital signatures and hash-based message authentication codes (HMACs), to verify the identity of the sender and the receiver, and to ensure that the data has not been modified during transmission. IPsec can also provide replay protection, which prevents an attacker from retransmitting old or duplicate packets. By combining SSL/TLS and IPsec, you can achieve a higher level of security and reliability for your cloud-based application. References:
* EC-Council CEHv12 Courseware Module 18: Cryptography, page 18-20
* EC-Council CEHv12 Courseware Module 19: Cloud Computing, page 19-29
* A comprehensive guide to data tampering
* Tamper Detection
NEW QUESTION # 760
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