WhiteHat Challenge 03 - Web001 - Web

Problem

Sign in and get the flag in the following site.

URL: http://web001-chal03.wargame.whitehat.vn Submit WhiteHat{sha1(flag)} Example: flag = Hello World sha1("Hello World") = 0a4d55a8d778e5022fab701977c5d840bbc486d0 submit: WhiteHat{0a4d55a8d778e5022fab701977c5d840bbc486d0} (all hash characters in lowercase)

Solution

We are given a simple web login form. Inspecting the html reveals a string test/test which appears to be valid login credentials. The web pages returns a message that admin login is required.

Inspecting the cookies for the web page reveals a cookie with field set to "user: test". We modify this cookie and after reloading the web page we are given the string don't_believe_cookies_at_all.

$ curl --cookie auth="user%3Dadmin" http://web001-chal03.wargame.whitehat.vn/index.php

FLAG: WhiteHat{92b2bc2f657574ab3481ebcb6705c36079b3e6d7}