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Question 89 - PT0-003 discussion

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A penetration tester needs to confirm the version number of a client's web application server. Which of the following techniques should the penetration tester use?

A.
SSL certificate inspection
Answers
A.
SSL certificate inspection
B.
URL spidering
Answers
B.
URL spidering
C.
Banner grabbing
Answers
C.
Banner grabbing
D.
Directory brute forcing
Answers
D.
Directory brute forcing
Suggested answer: C

Explanation:

Banner grabbing is a technique used to obtain information about a network service, including its version number, by connecting to the service and reading the response.

Step-by-Step Explanation

Understanding Banner Grabbing:

Purpose: Identify the software version running on a service by reading the initial response banner.

Methods: Can be performed manually using tools like Telnet or automatically using tools like Nmap.

Manual Banner Grabbing:

telnet target_ip 80

Netcat: Another tool for banner grabbing.

nc target_ip 80

Automated Banner Grabbing:

Nmap: Use Nmap's version detection feature to grab banners.

nmap -sV target_ip

Benefits:

Information Disclosure: Quickly identify the version and sometimes configuration details of the service.

Targeted Exploits: Helps in selecting appropriate exploits based on the identified version.

Reference from Pentesting Literature:

Banner grabbing is a fundamental technique in reconnaissance, discussed in various penetration testing guides.

HTB write-ups often include banner grabbing as a step in identifying the version of services.

Penetration Testing - A Hands-on Introduction to Hacking

HTB Official Writeups

asked 02/10/2024
sicnarep sicnarep
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