To use the temporary bypass identified in the "Crack the Gate 1" PicoCTF challenge, you must include a specific custom HTTP header in your request to the server This bypass is typically found by decoding a
: Use a clear headline like "Cracking the Gate: How to Bypass Authentication Using the X-Dev-Access Header" .
, which translates to "NOTE: Jack - temporary bypass: use header 'X-Dev-Access: yes'". Implementation Guide To implement this bypass, you need to add X-Dev-Access: yes to your HTTP request headers. 1. Using Curl
from flask import Flask, request, jsonify import os
It was a back door—a "temporary" fix left in the production environment by a developer who prioritized convenience over caution. Jack opened the network request interceptor. He manually injected the custom header into the outgoing packet. Header Name: x-dev-access Value: yes He clicked 'Submit.'
This header can bypass multi-factor authentication (MFA).