Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

Overview of this book

Nmap is a well known security tool used by penetration testers and system administrators. The Nmap Scripting Engine (NSE) has added the possibility to perform additional tasks using the collected host information. Tasks like advanced fingerprinting and service discovery, information gathering, and detection of security vulnerabilities."Nmap 6: Network exploration and security auditing cookbook" will help you master Nmap and its scripting engine. You will learn how to use this tool to do a wide variety of practical tasks for pentesting and network monitoring. Finally, after harvesting the power of NSE, you will also learn how to write your own NSE scripts."Nmap 6: Network exploration and security auditing cookbook" is a book full of practical knowledge for every security consultant, administrator or enthusiast looking to master Nmap. The book overviews the most important port scanning and host discovery techniques supported by Nmap. You will learn how to detect mis-configurations in web, mail and database servers and also how to implement your own monitoring system. The book also covers tasks for reporting, scanning numerous hosts, vulnerability detection and exploitation, and its strongest aspect; information gathering.
Table of Contents (18 chapters)
Nmap 6: Network Exploration and Security Auditing Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
References
Index

Brute forcing POP3 passwords


E-mail accounts store sensitive information. Penetration testers auditing mail servers must test for weak passwords that could help attackers compromise important accounts.

This recipe shows you how to perform brute force password auditing against POP3 mail servers by using Nmap.

How to do it...

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

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

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

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

How it works...

pop3-brute was submitted by Philip Pickering and it performs brute force password auditing against POP3 mail servers. By default, it uses the wordlists /nselib/data/usernames.lst and /nselib/data/passwords.lst as username and password combinations.

There's more...

The script pop3-brute depends on the NSE library unpwdb. This library has several script arguments that can...