You're reading from Nmap Network Exploration and Security Auditing Cookbook, Third Edition Network discovery and security scanning at your fingertips

Product type Paperback

Published in Sep 2021

Publisher Packt

ISBN-13 9781838649357

Length 436 pages

Edition 3rd Edition

Languages

C++

Tools

Nmap

Concepts

Network Security

Author (1):

Paulino Calderon

View More author details

Table of Contents (22) Chapters

Preface

1. Chapter 1: Nmap Fundamentals

2. Chapter 2: Getting Familiar with Nmap's Family FREE CHAPTER

3. Chapter 3: Network Scanning

4. Chapter 4: Reconnaissance Tasks

5. Chapter 5: Scanning Web Servers

6. Chapter 6: Scanning Databases

7. Chapter 7: Scanning Mail Servers

8. Chapter 8: Scanning Windows Systems

9. Chapter 9: Scanning ICS/SCADA Systems

10. Chapter 10: Scanning Mainframes

11. Chapter 11: Optimizing Scans

12. Chapter 12: Generating Scan Reports

13. Chapter 13: Writing Your Own NSE Scripts

14. Chapter 14: Exploiting Vulnerabilities with the Nmap Scripting Engine

15. Other Books You May Enjoy

Appendix A: HTTP, HTTP Pipelining, and Web Crawling Configuration Options

HTTP user agent

1. Appendix Β: Brute-Force Password Auditing Options

Brute modes

2. Appendix C: NSE Debugging

3. Appendix D: Additional Output Options

4. Appendix Ε: Introduction to Lua

5. Appendix F: References and Additional Reading

Why subscribe?

Brute-forcing POP3 passwords

Mail servers are always an attractive target as they store a lot of information in organizations. Attackers can guess weak passwords and access sensitive corporate data. As penetration testers, we must detect poorly designed password policies to prevent these attacks.

This recipe will show you how to launch dictionary attacks against POP3 servers with Nmap.

How to do it...

To launch a dictionary attack against POP3 with Nmap, enter the following command:

$ nmap -p110 --script pop3-brute <target>

Any valid accounts will be listed in the script output section:

PORT STATE SERVICE
110/tcp open    pop3
| pop3-brute: webmaster : abc123
|_acc1 : password

How it works...

The pop3-brute script was submitted by Philip Pickering, and it performs brute-force password auditing against POP3 servers. By default, this script uses the /nselib/data/usernames.lst and /nselib/data/passwords.lst word lists, but you can change...