Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By : Paulino Calderon
Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By: Paulino Calderon

Overview of this book

This is the second edition of ‘Nmap 6: Network Exploration and Security Auditing Cookbook’. A book aimed for anyone who wants to master Nmap and its scripting engine through practical tasks for system administrators and penetration testers. Besides introducing the most powerful features of Nmap and related tools, common security auditing tasks for local and remote networks, web applications, databases, mail servers, Microsoft Windows machines and even ICS SCADA systems are explained step by step with exact commands and argument explanations. The book starts with the basic usage of Nmap and related tools like Ncat, Ncrack, Ndiff and Zenmap. The Nmap Scripting Engine is thoroughly covered through security checks used commonly in real-life scenarios applied for different types of systems. New chapters for Microsoft Windows and ICS SCADA systems were added and every recipe was revised. This edition reflects the latest updates and hottest additions to the Nmap project to date. The book will also introduce you to Lua programming and NSE script development allowing you to extend further the power of Nmap.
Table of Contents (18 chapters)
13
Brute Force Password Auditing Options
17
References and Additional Reading

Finding system administrator accounts with empty passwords in MS SQL servers


Penetration testers often need to check that no administrative account has a weak password. With some help from Nmap NSE, we can easily check that an MS SQL instance has a system administrator (sa) account with an empty password.

This recipe teaches us how to use Nmap to find MS SQL servers with an empty system administrator password.

How to do it...

To find MS SQL servers with an empty sa account, open your terminal and enter the following Nmap command:

$ nmap -p1433 --script ms-sql-empty-password -v <target>

If an account with an empty password is found, it will be included in the script output section:

   PORT     STATE SERVICE  
   1433/tcp open  ms-sql-s  
   | ms-sql-empty-password:  
   |   [192.168.1.102:1433]  
   |_    sa:<empty> => Login Success

 

 

How it works...

The argument -p1433 --script ms-sql-empty-password make Nmap initiate the NSE script ms-sql-empty-password if an MS SQL server is found...