Burp, often known as Burp Suite, is a package of web application penetration testing tools developed by Portswigger. Its numerous tools operate in unison to assist the entire testing process, from mapping and analysing an application’s attack surface to detecting and exploiting security flaws. Burp Suite is installed by default in Kali Linux.
BurpSuite aims to be an all-in-one toolkit, and its capabilities may be expanded by installing BApps, or add-ons. It has become the most widely used tool among professional web app security researchers and bug bounty hunters.
The tool is available in three editions: a free Community Edition, a Professional Edition, and an Enterprise Edition that may be purchased after a trial period. The Community version comes with much fewer features. Its goal is to provide a comprehensive security solution for online applications.
A spider, a repeater, a decoder, a comparer, an extender, and a sequencer are among the tool’s more complex features, including a spider, a repeater, a decoder, and a comparer, an extender, and a sequencer.
It’s a web crawler or spider that maps the target web application. The goal of the mapping is to provide a list of endpoints that can be examined for functioning and potential vulnerabilities. The rationale for spidering is that the more endpoints you collect throughout your recon phase, the more attack surfaces you’ll have during your real-time testing.
The sequencer is an entropy checker that ensures that tokens created by the webserver are random. Cookies and anti-CSRF tokens are examples of these tokens commonly used for authentication in sensitive processes. These tokens should ideally be created completely randomly, with the likelihood of each conceivable character appearing at each place spread evenly. This should be accomplished both in terms of bits and characters. An entropy analyser verifies that this hypothesis is correct.
To increase the tool suite’s capabilities, external components can be incorporated into BurpSuite. BApps are the name for these external components. These function in the same way as browser extensions do. In the Extender window, they may be seen, edited, installed, and removed. Some may be used with the free community version, while others require the expensive professional version.
URL, HTML, Base64, Hex, and other popular encoding schemes are listed in Decoder. This tool is useful for searching for data chunks in parameter or header values. It’s also used to create payloads for a variety of vulnerability classes. It’s used to find the most common IDOR and session hijacking scenarios.
Repeater allows a user to submit requests repeatedly while making manual changes. It is employed for the following purposes:
Checking to see if the user-supplied values are being checked. How successfully is it being done if user-supplied values are being verified? What values does the server expect in an input parameter/request header? What happens if the server encounters unexpected values? Is the server doing input sanitation? How thoroughly does the server sanitise the data provided by the user? What sanitation method does the server employ? Which of the cookies on your computer is the session cookie? How is CSRF protection done, and is it possible to go around it?
Burp Suite, a Java-based platform for web penetration testing, has evolved into an industry-standard toolkit for information security experts. Burp Suite aids in the detection of online application vulnerabilities and the verification of attack paths. Taking into consideration the breadth as well as the depth of its features, Burp Suite has been recognised as one of the most popular and widely used packages of web application penetration testing tools.
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