Czechstreets 139 -
GET /api/streets?offset=138&limit=1000000 Running the request:
curl -s "http://139.czechstreets.ctf/api/streets?offset=138&limit=1000000" \ | jq -r '.[0].metadata' \ | base64 -d \ | jq -r .flag Output: czechstreets 139
<!DOCTYPE html> <html> <head><title>Czech Streets – Find the hidden street</title></head> <body> <h1>Welcome to the Czech Streets challenge!</h1> <p>Enter a street name to see its details.</p> GET /api/streets
<div id="result"></div> </body> </html> No obvious clues, but the form submits a GET request to /search?q=… . Running gobuster (or dirsearch ) against the host revealed a few hidden routes: | | Goal | Retrieve the flag, which
Event: CzechStreets CTF (2024) Category: Web / Information‑Disclosure / Minor Crypto Difficulty: ★★☆☆☆ (easy–medium) 1️⃣ Challenge Overview | Item | Description | |------|-------------| | Title | czechstreets – 139 | | Provided | A public URL: http://139.czechstreets.ctf (the “139” sub‑domain is part of the challenge name). The landing page shows a simple map of Prague with numbered streets and a tiny search box that says “Find the hidden street”. | | Goal | Retrieve the flag, which is hidden somewhere on the site. | | Flag format | czechstreets… |
"flag":"czechstreets flag_really_email_html " The flag is clearly embedded in the JSON. A one‑liner to fetch and decode in one go: