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Nmap: Network Exploration and Security Auditing Cookbook

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

Product type Paperback

Published in May 2017

Publisher

ISBN-13 9781786467454

Length 416 pages

Edition 2nd Edition

Languages

Lua

Tools

Nmap

Concepts

Penetration Testing

Author (1):

Paulino Calderon

View More author details

Table of Contents (18) Chapters

Preface

1. Nmap Fundamentals

2. Network Exploration FREE CHAPTER

3. Reconnaissance Tasks

4. Scanning Web Servers

5. Scanning Databases

6. Scanning Mail Servers

7. Scanning Windows Systems

8. Scanning ICS SCADA Systems

9. Optimizing Scans

10. Generating Scan Reports

11. Writing Your Own NSE Scripts

12. HTTP, HTTP Pipelining, and Web Crawling Configuration Options

13. Brute Force Password Auditing Options

Brute modes

14. NSE Debugging

15. Additional Output Options

16. Introduction to Lua

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]  
   | ...

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Authors (1)

Paulino Calderon

Paulino Calderon

Paulino Calderon (@calderpwn on Twitter) is the cofounder of Websec, a company offering information security consulting services based in Mexico and Canada. When he is not traveling to a security conference or conducting on-site consulting for Fortune 500 companies, he spends peaceful days in Cozumel, a beautiful small island in the Caribbean, learning new technologies, conducting big data experiments, developing new tools, and finding bugs in software. Paulino is active in the open source community, and his contributions are used by millions of people in the information security industry. In 2011, Paulino joined the Nmap team during the Google Summer of Code to work on the project as an NSE developer. He focused on improving the web scanning capabilities of Nmap, and he has kept contributing to the project since then. In addition, he has been a mentor for students who focused on vulnerability detection during the Google Summer of Code 2015 and 2017. He has published Nmap 6: Network Exploration and Security Auditing Cookbook and Mastering the Nmap Scripting Engine, which cover practical tasks with Nmap and NSE development in depth. He loves attending information security conferences, and he has given talks and participated in workshops in dozens of events in Canada, the United States, Mexico, Colombia, Peru, Bolivia, and Curacao.

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