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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

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Product type Paperback
Published in May 2017
Publisher
ISBN-13 9781786467454
Length 416 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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Paulino Calderon Paulino Calderon
Author Profile Icon Paulino Calderon
Paulino Calderon
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Table of Contents (18) Chapters Close

Preface 1. Nmap Fundamentals FREE CHAPTER 2. Network Exploration 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 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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