2/23/2024 0 Comments Burp suite intruder walkthrough![]() You can do this in an external tool like CyberChef, or select each character individually, right-click, select Convert > URL > URL encode all characters. You will need to URL encode the :, /, & and =. Then modify the stockApi value to be equal to: Right-click the response in the HTTP History view, then Send to Repeater this time. Now that we know where the admin panel is ( 192.168.0.142:8080/admin), we need to send a POST request to the delete user endpoint to delete Carlos.įrom looking at the “pretty” response tab, we see that this endpoint is /admin/delete&username=carlos: Lab Solution This payload number ( 192.168.0.142 in this case) corresponds to the last digit of the IP where the admin interface lives: Scroll through the results until you see a large response: This will make requests to all IP addresses on the 192.168.0.1/32 range, with port 8080 and endpoint /admin. You’ll need to select a Payload Type of “Numbers”, then fill out the form as shown (starting at 1, ending at 255, with a step of 1): Next, highlight the “1” at the end of the IP, then click Add to turn it into a variable: Then modify the request to have a payload of http%3A%2F%2F192.168.0.1%3A8080%2Fadmin, the URL-encoded version of. Then, in the Intruder tab, we’ll need to modify the payload positions.įirst, hit Clear on the right-hand side to remove all existing payload positions, designated with a §. Right-click the request in the Burp Suite Proxy > HTTP history view and select Send to Intruder: To find this, we’ll use Burp Suite’s Intruder tool. Where ? is an unknown value between 0 and 255. If we highlight this URL encoded value in the Burp Suite request window, then right click and select Send to Decoder, then click Smart Decode, we see that it decodes to: This is what we’ll tamper with to get admin panel access. Here’s the website, the typical shopping site:Ĭlick into a product and then scroll down to see the product stock checker that the lab description talks about:Ĭlick the check stock button, then look in Burp Suite to see the request:Īs before, we’ve got a stockApi value that instructs the server to send a request to an internally-accessible network. This will be in format SSRF, or Server Side Request Forgery, is a way of tricking the server into sending requests on your behalf such as to an internal host that would otherwise not be accessible to you.įor this lab, we need to find the admin portal on the internal network, then delete Carlos’ account from there.īefore we get started, make sure you have Burp Suite open and a proxy running. Challenge InformationĬlick the “Access the Lab” button and you will be taken to a temporary website that is created for your account. This is accessible from the “ all labs” view or from the SSRF page. ![]() Log in to your Academy account and then view the lab at. For this walkthrough, you’ll need to have Burp Suite set up, as well as a Portswigger Academy account. Obviously, you’d want to tidy it up, but with some tweaking you can use this to build your own python 2FA bypass script.This is a writeup for the “basic SSRF against another back-end system” lab from PortSwigger Academy. For example, with Burp intruder you learn how to do a point and click brute force, where the only hard bit is identifying the vulnerable application logic.įor example, the python requests module allows you to create a script which will brute force it for you.Īt a high level you’d probably want to look look at something like: import requests This isn’t an obstacle though - its a chance to learn other things. Ok, there are always going to be limits on what is available for free. Oh, well it seems there is a timeout for the lab implemented by PortSwigger - and as a beginner I cannot afford nor want the pro version of burp since I probably won’t be able to use half the features effectively.
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