What to Do Before Web Spidering With Burp

In this series of manufactures, I am going to demonstrate how you can manually exploit the vulnerability of a web awarding, compared to using whatever automation tool, in order to discover vulnerabilities in the application. Almost all companies worldwide focus on manual testing of spider web application rather than running web application scanners, which limit your knowledge and skills and the scope of finding a vulnerability with your testing.

For the whole series I am going to use these programs:

  1. NOWASP Mutiliadae

  2. BURP Proxy

NOWASP Mutiliadae

NOWASP Mutiliadae is a purposely vulnerable web application containing more than xl vulnerabilities. Information technology includes all of the OWASP top 10 vulnerabilities along with vulnerabilities from other organizations' lists. In that location are other minor and mid-level range vulnerabilities that are scanned by different web application scanners, such as Vega, Acunetix, Nikto, w3af, etc. I am going to apply the latest version of this project, which has an object-oriented design to provide amend understanding of all vulnerabilities of the web awarding.

Burp Suite

Some other tool that I am going to employ is Burp Proxy. This is an interception proxy tool that interacts between the client (a browser application, e.thou., Firefox or Chrome) and the website or server. It will be running on my local motorcar and it will intercept inbound and outbound traffic betwixt the browser and the target host (in our case, the target host is NOWASP Mutiliadae). The major use of this tool is when you make a request to access the server, Burp Suite intercepts that request from your car to the server/website and you can change the request according to your needs. As well it reveals the blazon of the request, whether information technology is a GET or POST request or some other. Burp also has the ability to prove you the list of parameters that are used by the website in social club to pass your request to from you to the server. You can manipulate the request to change the way you lot desire to check the security of that particular spider web application. To intercept the request, your Burp Proxy listener must exist configured on a 127.0.0.ane localhost and port 8080. And then you also fix this proxy configuration in your web browser. After doing and so, become to Burp Suite => proxy tab => Intercept is on (make certain this button is pressed). I will not get deep into all the tabs and their functionality. You lot can see the Burp manual or documentation for that.

Working Flow of Web

Before we get ahead, y'all should understand how the web works on the backend, which you lot cannot see on your spider web browser. When yous visit whatever website your browser asks for a file from the spider web server, which tin be HTML, PHP, js (JavaScript), CSS, ASPX, etc. Using Burp Suite, we can find that asking equally shown beneath. To see the request, I configured Burp and my browser as mentioned above and so visited the HTML5 storage page shown in the moving-picture show below.

As soon equally I click on the link, Burp will intercept the request, which is shown beneath. You can see here that it is requesting an index.php page from the server. Burp volition also prove you lot the parameter that is required to load the whole page. Here that parameter is page and the value of that parameter is html5-storage.PHP.

[php]
Go /chintan/index.php?page=html5-storage.php HTTP/1.i
Host: localhost
User-Amanuensis: Mozilla/five.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-The states,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost/chintan/
Cookie: showhints=0; username=chintan; uid=nineteen; PHPSESSID=j53u16lcdkjq0eec6nfijphkd4
Connection: keep-alive
[/php]

I need to access this page, so I volition forward this request and in the department beneath, if you see the response tab, and so I volition get the response "200 OK."

[html]
HTTP/1.ane 200 OK
Engagement: Sabbatum, 28 Dec 2013 23:30:08 GMT
Server: Apache/2.four.3 (Win32) OpenSSL/1.0.1c PHP/5.4.7
10-Powered-By: PHP/five.4.7
Logged-In-User: chintan
Keep-Alive: timeout=5, max=100
Connection: Proceed-Alive
Content-Type: text/html
Content-Length: 46178
[/html]

"200 OK" shows that my request has been successfully processed and I am giving back the response. So if I expect at my web browser, the full web page volition accept been loaded there.

Remember: An HTML file is dynamically created each time yous make a request. The PHP file in the backend will see your request and will create an HTML file to send to your browser in order to render the page. Any you see on your web browser is not a web page. it is your browser's interpretation of how the spider web page should look similar graphically.

" Always make information technology a proficient practice to come across the webpage from the source lawmaking and get yourself familiar with that only not with the one that you see graphics on your spider web browser. Get yourself familiar with JavaScript, XML, and all HTML tags, if possible."

Where to Offset?

The common problem of all beginners is knowing what to do outset when starting to test. Nosotros all know the ethical hacking life bicycle. The get-go phase is data gathering or reconnaissance. In this case, I will get as much information every bit I can about the website and the server without actually surfing each web page. If yous accept noticed them from the above asking and response, we have already come to know near some of the things in it. That information is as follows:

No.

Information

1.

Server – Apache

2.

Apache Version – 2.4.3

3.

Server Side Coding – PHP

4.

PHP version – 5.four.7

6.

HTTPs Protocol – SSL Used

seven.

SSL Version – 1.0.1c

8.

Logged in User

9.

Username – chintan

There are plenty of means to gather information. Even so, people mostly follow Google, Recon-ng Framework, and other awarding security testing tools. I will listing all the pages and folders of my target using the spider option in Burp Suite. To do that, go to history and check the showtime page you visited. Correct click on that and select the option to add together to the scope.

Now if y'all get to the target tab y'all will see your scope of testing website, which is localhost in my example, as shown below.

"Information technology will as well list all of the other websites that are being visited without you knowing. Permit u.s.a. consider any live website: There will be a "similar" push, a "share" push button or some kind of advertisement that volition also get listed here. To remove an unscoped item, click on the filter bar and set your all options every bit shown in the figure beneath, then click anywhere on the blank page and changes volition be applied."

Afterward that, as I mentioned, I demand to spider this host, so I will right click on the localhost and select the Spider this host option. If your target awarding has a form submission, then y'all volition get a popup to fill in and submit the grade values.

After clicking on that, the spidering of your target host volition be started. If you go to the spider tab, y'all will see something like the picture beneath.

"Notation that if a request queue becomes and remains 0 for more than enough time, information technology means the spidering of that web application is finished."

Then you tin go alee and again check the target option; y'all will see the list of all the pages that web application has. Some new pages might have been added.

Proxy Setting

There are non any particular settings or configuration. I personally prepare the configurations every bit shown in the figure.

The reason I am using these settings is because our target host might link to a ton of other websites via share buttons, advertisements, etc. I want to intercept all the advice between myself and my target host, merely not whatsoever other website. That is why I tick that checkbox to intercept only a asking that "Is in target telescopic." I also want to intercept each response that is processed by the server against my all responses so that I can know if my asking is candy properly or take I been redirected to somewhere else, etc. And so I tick that pick that shows "Intercept all the responses."

Preface of the Next Role of This Commodity

In the next part of this article series, I will show yous how to identify the application entry points and the injection points and how the server encodes your input.

References

albersdersecting.blogspot.com

Source: https://resources.infosecinstitute.com/topic/manual-web-application-penetration-testing-introduction/

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