CEH Practice Test 2 — 10 Questions

Question 1

Which command-line tool is specifically designed to extract email addresses, subdomains, and other information from public sources (e.g., search engines, social media) for a given domain?

Accepted Answer

theHarvester. theHarvester is a dedicated open-source intelligence (OSINT) tool designed to gather emails, subdomains, IPs, and employee names from public sources such as Google, Bing, LinkedIn, and PGP key servers. It specifically targets a given domain and queries search engines and social media APIs to extract this reconnaissance data, making it the correct choice for this task.

Answer

Metasploit

Answer

Nmap

Answer

Wireshark

Question 2

Which wireless security standard introduced in 2018 uses Simultaneous Authentication of Equals (SAE) to replace the pre-shared key exchange in WPA2, providing forward secrecy and resistance to offline dictionary attacks?

Accepted Answer

WPA3. WPA3 uses SAE (Dragonfly handshake) to provide forward secrecy and protect against offline dictionary attacks. WPA2 used PSK which is vulnerable to dictionary attacks. WEP and 802.1X are older or different.

Answer

802.1X/EAP

Answer

WEP

Answer

WPA2

Question 3

During a penetration test, you gain initial access to a Linux server as a low-privileged user. The target runs a vulnerable SUID binary owned by root. Which of the following is the MOST effective method to escalate privileges?

Accepted Answer

Exploit the SUID binary to execute commands as root. The SUID binary owned by root runs with root privileges regardless of the user executing it. Exploiting a vulnerable SUID binary (e.g., via command injection, buffer overflow, or misconfigured capabilities) allows the low-privileged user to execute arbitrary commands as root, directly escalating privileges. This is the most effective method because it leverages a known privilege escalation vector specific to Linux SUID binaries.

Answer

Perform an SMTP VRFY attack to enumerate users

Answer

Use enum4linux to enumerate SMB shares

Answer

Run 'sudo -l' to list sudo privileges

Question 4

Which THREE of the following are common indicators of a buffer overflow vulnerability?

Accepted Answer

Unexpected program crashes or segmentation faults. A is correct because buffer overflow vulnerabilities often cause unexpected program crashes or segmentation faults. When a program writes data beyond the allocated buffer size, it can corrupt the stack or heap, leading to invalid memory access that the operating system detects and terminates with a segmentation fault (SIGSEGV). This is a classic symptom of overwritten return addresses or other critical control data.

Answer

Use of return-oriented programming (ROP)

Answer

High CPU usage

Question 5

A forensic analyst finds a system where the user's password hash was obtained and cracked offline. The attacker then used stolen credentials to log in and run `wevtutil cl system`. What is the purpose of this command?

Accepted Answer

Clear the System event log. The `wevtutil cl system` command clears the System event log on Windows. After cracking the user's password hash offline, the attacker logs in with stolen credentials and runs this command to erase forensic evidence of their activities, such as logon events or service failures, from the System log. This is a common post-exploitation step to hinder incident response.

Answer

Remove scheduled tasks

Answer

Delete the SAM database

Answer

Disable Windows Defender

Question 6

Which TWO of the following are considered passive reconnaissance techniques? (Choose TWO.)

Accepted Answer

WHOIS lookup. WHOIS lookup is a passive reconnaissance technique because it queries public domain registration databases (via WHOIS protocol, RFC 3912) to obtain information such as registrar, registrant contact details, name servers, and expiration dates. This process does not send any packets directly to the target's infrastructure; instead, it relies on third-party data sources, making it undetectable by the target.

Answer

Ping sweep

Answer

Banner grabbing with Telnet

Answer

Port scanning

Question 7

An attacker discovers that a web application's login form allows unlimited login attempts. The attacker uses a list of usernames and passwords obtained from a previous breach to gain access. This attack is known as:

Accepted Answer

Credential stuffing. Credential stuffing (option D) is correct because the attacker uses a list of known username/password pairs from a previous breach to automate login attempts against the web application. This attack exploits password reuse across services, not the weakness of the passwords themselves, and relies on the application's lack of rate limiting or account lockout mechanisms.

Answer

Password spraying

Answer

Brute force attack

Answer

Dictionary attack

Question 8

Which of the following commands would a penetration tester use to enumerate SMB shares on a target Windows machine from a Linux system?

Accepted Answer

smbclient -L // -N. The `smbclient -L // -N` command lists SMB shares on a target Windows machine without requiring a password (null session). This is a standard enumeration technique because SMB uses TCP port 445 and the `-L` flag queries the share list, while `-N` suppresses the password prompt, allowing anonymous access if the target permits null sessions.

Answer

ldapsearch -x -h <IP>

Answer

snmpwalk -v2c -c public <IP>

Answer

nbtstat -A <IP>

Question 9

Which of the following is the most effective defense against Cross-Site Request Forgery (CSRF) attacks?

Accepted Answer

CSRF tokens. CSRF tokens are the most effective defense because they are unique, unpredictable values embedded in each form or request that the server validates. Without a valid token, the server rejects the request, preventing an attacker from forging a legitimate user's action even if the victim is authenticated.

Answer

Content Security Policy (CSP)

Answer

Rate limiting

Answer

Input validation

Question 10

An attacker uses an idle scan with Nmap to probe a target. This technique relies on a third-party host with a predictable IP ID sequence to infer port states. Which Nmap flag enables an idle scan?

Accepted Answer

-sI. The idle scan (-sI) leverages a third-party host (zombie) with a predictable IP ID sequence to indirectly probe a target's ports. By spoofing the zombie's IP and observing changes in its IP ID counter, Nmap can infer whether a port is open, closed, or filtered without sending packets directly from the attacker's IP.

Answer

-sS

Answer

-sA

Answer

-sT