CSRF Scanner Extension for Burp Suite Pro Requirements. Burp Suite Pro; If you want to compile the code from scratch, you will also need the following: JSoup library (either compile into the.jar or copy to Burp's Java Environment directory) Burp Extender API. To test for CSRF vulnerability using Burp Suite, follow the below procedure. Login to your target web application and go to 'Change password' field and fill the required information. To test for the CSRF vulnerability, remove the token and forward the request. If you get the same response as like the response with the token, then it is. Burp Suite vs CSRF Tokens by HollyGraceful November 11, 2015 February 3, 2020 Recently I wrote a quick HowTo about dealing with using Burp Suite against an application that invalidates your session whenever it spots a potential malicious payload. Adding a new Session Handling Rule using Burp Suite. In the select macro part of the window we are going to click on add. At this point we need to highlight the GET request because is the one which is retrieving the CSRF token and that is the parameter we are interested to update. Selecting the request to update the CSRF token.
- Cross Site Request Forgery(CSRF) is an attack in which an attacker tricks a victim to click on a malicious website or an application.
- This malicious website or application makes an unintended request to another application that the victim has an active session with.
- Applications are vulnerable when they use known, or predictable, URLs and parameters; and when the browser automatically transmits all required session information with each request to the vulnerable application.
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- The easiest way to check whether an application is vulnerable is to see if each link and form contains an unpredictable token for each user. I
- ntercept HTTP requests to your web application using a HTTP Proxy and check for an unpredictable token which is unique for each session is used.
- Applications pages having such unpredictable token are usually not vulnerable to CSRF; else, the page might be vulnerable and the below exploit code can be used to further assess the vulnerability.
<form name=”badform” method=”post” action=”http://example.com/ Update_user_details.jsp”>
<input type=”hidden” name=”firstName” value=”Tom” />
<input type=”hidden” name=”phoneNumber” value=”12345678” />
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- Enable burp proxy on your browser and send the application traffic through the proxy.
- In Proxy-> History tab, select the request which you want to test for CSRF.
- Right click on the request and select Engagement Tools -> Generate CSRF POC.
- Copy HTML and paste into a HTML file and open it in the browser on which user is logged in to test.
Burp Suite Csrf Intruder
- CSRF attacks are only possible when the attacked web application does not have an additional mechanism to ensure that requests towards it are genuine.
- In order to do that, the web developer must include a unique token for each request, which is validated on the server upon receiving a request.
- If the request value that represents the token matches the token that was generated for the request, then it is considered genuine and it should be left for additional processing.
- However, if both values do not match then the request is considered forged and as such should be disregarded.
- CSRF prevention tokens should at a minimum be unique per user session, but can also be unique per request.