Book Image

Learn Ethical Hacking from Scratch.

By : Zaid Sabih
5 (1)
Book Image

Learn Ethical Hacking from Scratch.

5 (1)
By: Zaid Sabih

Overview of this book

This book starts with the basics of ethical hacking, how to practice hacking safely and legally, and how to install and interact with Kali Linux and the Linux terminal. You will explore network hacking, where you will see how to test the security of wired and wireless networks. You’ll also learn how to crack the password for any Wi-Fi network (whether it uses WEP, WPA, or WPA2) and spy on the connected devices. Moving on, you will discover how to gain access to remote computer systems using client-side and server-side attacks. You will also get the hang of post-exploitation techniques, including remotely controlling and interacting with the systems that you compromised. Towards the end of the book, you will be able to pick up web application hacking techniques. You'll see how to discover, exploit, and prevent a number of website vulnerabilities, such as XSS and SQL injections. The attacks covered are practical techniques that work against real systems and are purely for educational purposes. At the end of each section, you will learn how to detect, prevent, and secure systems from these attacks.
Table of Contents (24 chapters)
22
Discovering Vulnerabilities Automatically Using OWASP ZAP

Preventing SQLi

So far, we have seen that SQL injections are very dangerous; they also occur very easily and are very easy to find. We will find them everywhere, even in really famous websites. People try to prevent these vulnerabilities using filters. Filters can make it look like there are no exploits, but if we actually try harder, by using different types of encoding, or a proxy, we will be able to bypass most of these filters. Some programmers use a blacklist so, for example, they prevent the use of union and the insert statement. Again, it's not 100% secure, and it can be bypassed. Using a whitelist has exactly the same issues as a blacklist.

The best way to prevent SQLi is to program our web application so that it does not allow code to be injected into it and then executed. So, the best way to do that is to use parameterized statements, where the data and the code...