Book Image

Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition

By : Paulino Calderon
Book Image

Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition

By: Paulino Calderon

Overview of this book

Nmap is one of the most powerful tools for network discovery and security auditing used by millions of IT professionals, from system administrators to cybersecurity specialists. This third edition of the Nmap: Network Exploration and Security Auditing Cookbook introduces Nmap and its family - Ncat, Ncrack, Ndiff, Zenmap, and the Nmap Scripting Engine (NSE) - and guides you through numerous tasks that are relevant to security engineers in today’s technology ecosystems. The book discusses some of the most common and useful tasks for scanning hosts, networks, applications, mainframes, Unix and Windows environments, and ICS/SCADA systems. Advanced Nmap users can benefit from this book by exploring the hidden functionalities within Nmap and its scripts as well as advanced workflows and configurations to fine-tune their scans. Seasoned users will find new applications and third-party tools that can help them manage scans and even start developing their own NSE scripts. Practical examples featured in a cookbook format make this book perfect for quickly remembering Nmap options, scripts and arguments, and more. By the end of this Nmap book, you will be able to successfully scan numerous hosts, exploit vulnerable areas, and gather valuable information.
Table of Contents (22 chapters)
Appendix A: HTTP, HTTP Pipelining, and Web Crawling Configuration Options
Appendix Β: Brute-Force Password Auditing Options
Appendix F: References and Additional Reading

Detecting insecure cross-domain policies

Cross-domain and client access policies need to be checked for overly permissive permissions. Insecure configurations allow cross-site request forgery attacks and could be abused to obtain sensitive data from web servers. The http-cross-domain-policy script will help us detect these insecure configurations and check whether there are any domain names available for purchase to abuse the configuration.

This recipe shows how to detect insecure cross-domain policies in web servers with Nmap.

How to do it...

Use the following Nmap command to check the cross-domain policies of a web server:

$ nmap --script http-cross-domain-policy <target>

A vulnerability report will show up if the client access or cross-domain policy files are found. Additional information will be included to manually analyze the issue:

PORT STATE SERVICE    REASON
8080/tcp open    http-proxy syn-ack
| http-cross-domain...