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 (25 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
13
Brute Force Password Auditing Options
17
References and Additional Reading

Running commands through xp_cmdshell in MS SQL servers


MS SQL servers have a stored procedure named xp_cmdshell. This feature allows programmers to execute commands through MS SQL servers. This feature is enabled in a lot of environments and is very dangerous if attackers gain access to a set of credentials, especially if it is the MS SQL super administrator account that has system privileges.

This recipe shows how to run Windows commands through MS SQL servers with Nmap.

How to do it...

Open your terminal and enter the following Nmap command to check whether xp_cmdshell is enabled:

$ nmap --script-args 'mssql.username="<user>",mssql.password="<password>"' --script ms-sql-xp-cmdshell -p1433 <target>

An error message will be returned if something goes wrong. Otherwise, you should see the output of the command:

   PORT     STATE SERVICE  VERSION  
   1433/tcp open  ms-sql-s Microsoft SQL Server 2011 11.00.1750.00  
   | ms-sql-xp-cmdshell:  
   |   [192.168.1.102:1433]  
   | ...