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Current File : /usr/share/nmap/scripts/ms-sql-query.nse
local mssql = require "mssql"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"

-- -*- mode: lua -*-
-- vim: set filetype=lua :

description = [[
Runs a query against Microsoft SQL Server (ms-sql).

SQL Server credentials required: Yes (use <code>ms-sql-brute</code>, <code>ms-sql-empty-password</code>
and/or <code>mssql.username</code> & <code>mssql.password</code>)
Run criteria:
* Host script: Will run if the <code>mssql.instance-all</code>, <code>mssql.instance-name</code>
or <code>mssql.instance-port</code> script arguments are used (see mssql.lua).
* Port script: Will run against any services identified as SQL Servers, but only
if the <code>mssql.instance-all</code>, <code>mssql.instance-name</code>
and <code>mssql.instance-port</code> script arguments are NOT used.

NOTE: Communication with instances via named pipes depends on the <code>smb</code>
library. To communicate with (and possibly to discover) instances via named pipes,
the host must have at least one SMB port (e.g. TCP 445) that was scanned and
found to be open. Additionally, named pipe connections may require Windows
authentication to connect to the Windows host (via SMB) in addition to the
authentication required to connect to the SQL Server instances itself. See the
documentation and arguments for the <code>smb</code> library for more information.

NOTE: By default, the ms-sql-* scripts may attempt to connect to and communicate
with ports that were not included in the port list for the Nmap scan. This can
be disabled using the <code>mssql.scanned-ports-only</code> script argument.
]]

---
-- @usage
-- nmap -p 1433 --script ms-sql-query --script-args mssql.username=sa,mssql.password=sa,ms-sql-query.query="SELECT * FROM master..syslogins" <host>
--
-- @args ms-sql-query.query The query to run against the server.
--       (default: SELECT @@version version)
-- @args mssql.database Database to connect to (default: tempdb)
--
-- @output
-- | ms-sql-query:
-- |   [192.168.100.25\MSSQLSERVER]
-- |     Query: SELECT @@version version
-- |       version
-- |       =======
-- |       Microsoft SQL Server 2005 - 9.00.3068.00 (Intel X86)
-- |     	Feb 26 2008 18:15:01
-- |     	Copyright (c) 1988-2005 Microsoft Corporation
-- |_    	Express Edition on Windows NT 5.2 (Build 3790: Service Pack 2)
--

-- Created 01/17/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 02/01/2011 - v0.2 - Added ability to run against all instances on a host;
--                             added compatibility with changes in mssql.lua (Chris Woodbury)

author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"}


dependencies = {"ms-sql-brute", "ms-sql-empty-password"}

hostrule = mssql.Helper.GetHostrule_Standard()
portrule = mssql.Helper.GetPortrule_Standard()

---
local function process_instance( instance )
  local status, result
  -- the tempdb should be a safe guess, anyway the library is set up
  -- to continue even if the DB is not accessible to the user
  -- TODO: consider renaming this arg to ms-sql-query.database
  local database = stdnse.get_script_args( 'mssql.database' ) or "tempdb"
  local query = stdnse.get_script_args( {'ms-sql-query.query', 'mssql-query.query' } ) or "SELECT @@version version"
  local helper = mssql.Helper:new()

  status, result = helper:ConnectEx( instance )

  if status then
    status, result = helper:LoginEx( instance, database )
    if ( not(status) ) then result = "ERROR: " .. result end
  end
  if status then
    status, result = helper:Query( query )
    if ( not(status) ) then result = "ERROR: " .. result end
  end

  helper:Disconnect()

  if status then
    result = mssql.Util.FormatOutputTable( result, true )
    result["name"] = string.format( "Query: %s", query )
  end
  local instanceOutput = {}
  instanceOutput["name"] = string.format( "[%s]", instance:GetName() )
  table.insert( instanceOutput, result )

  return instanceOutput
end


action = function( host, port )
  local scriptOutput = {}
  local status, instanceList = mssql.Helper.GetTargetInstances( host, port )

  if ( not status ) then
    return stdnse.format_output( false, instanceList )
  else
    for _, instance in pairs( instanceList ) do
      local instanceOutput = process_instance( instance )
      if instanceOutput then
        table.insert( scriptOutput, instanceOutput )
      end
    end
    if ( not( stdnse.get_script_args( {'ms-sql-query.query', 'mssql-query.query' } ) ) ) then
      table.insert(scriptOutput, 1, "(Use --script-args=ms-sql-query.query='<QUERY>' to change query.)")
    end
  end

  return stdnse.format_output( true, scriptOutput )
end

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