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MS SQL NSE scripts run on database instances, which can be TCP or named pipes. With this change, all TCP instances on scanned ports will have script output attached under the port as a portrule script. Named pipe instances and TCP instances on unscanned ports will be displayed in the hostrule script output at the end of the host's output. Utility function mssql.Helper.InitScript makes it easy to write scripts that just work on a per-instance basis, without bothering where to put the output. Discovery will be done once per host, regardless of how many scripts are run, and can be guaranteed to be done before the script's action takes place.
108 lines
4.1 KiB
Lua
108 lines
4.1 KiB
Lua
local mssql = require "mssql"
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local stdnse = require "stdnse"
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local string = require "string"
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local table = require "table"
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-- -*- mode: lua -*-
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-- vim: set filetype=lua :
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description = [[
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Runs a query against Microsoft SQL Server (ms-sql).
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SQL Server credentials required: Yes (use <code>ms-sql-brute</code>, <code>ms-sql-empty-password</code>
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and/or <code>mssql.username</code> & <code>mssql.password</code>)
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Run criteria:
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* Host script: Will run if the <code>mssql.instance-all</code>, <code>mssql.instance-name</code>
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or <code>mssql.instance-port</code> script arguments are used (see mssql.lua).
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* Port script: Will run against any services identified as SQL Servers, but only
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if the <code>mssql.instance-all</code>, <code>mssql.instance-name</code>
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and <code>mssql.instance-port</code> script arguments are NOT used.
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NOTE: Communication with instances via named pipes depends on the <code>smb</code>
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library. To communicate with (and possibly to discover) instances via named pipes,
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the host must have at least one SMB port (e.g. TCP 445) that was scanned and
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found to be open. Additionally, named pipe connections may require Windows
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authentication to connect to the Windows host (via SMB) in addition to the
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authentication required to connect to the SQL Server instances itself. See the
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documentation and arguments for the <code>smb</code> library for more information.
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NOTE: By default, the ms-sql-* scripts may attempt to connect to and communicate
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with ports that were not included in the port list for the Nmap scan. This can
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be disabled using the <code>mssql.scanned-ports-only</code> script argument.
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]]
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---
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-- @usage
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-- nmap -p 1433 --script ms-sql-query --script-args mssql.username=sa,mssql.password=sa,ms-sql-query.query="SELECT * FROM master..syslogins" <host>
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--
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-- @args ms-sql-query.query The query to run against the server.
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-- (default: SELECT @@version version)
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-- @args mssql.database Database to connect to (default: tempdb)
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--
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-- @output
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-- | ms-sql-query:
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-- | [192.168.100.25\MSSQLSERVER]
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-- | Query: SELECT @@version version
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-- | version
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-- | =======
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-- | Microsoft SQL Server 2005 - 9.00.3068.00 (Intel X86)
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-- | Feb 26 2008 18:15:01
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-- | Copyright (c) 1988-2005 Microsoft Corporation
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-- |_ Express Edition on Windows NT 5.2 (Build 3790: Service Pack 2)
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--
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-- Created 01/17/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
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-- Revised 02/01/2011 - v0.2 - Added ability to run against all instances on a host;
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-- added compatibility with changes in mssql.lua (Chris Woodbury)
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author = "Patrik Karlsson"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"discovery", "safe"}
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dependencies = {"broadcast-ms-sql-discover", "ms-sql-brute", "ms-sql-empty-password"}
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---
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local function process_instance( instance )
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local status, result
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-- the tempdb should be a safe guess, anyway the library is set up
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-- to continue even if the DB is not accessible to the user
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-- TODO: consider renaming this arg to ms-sql-query.database
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local database = stdnse.get_script_args( 'mssql.database' ) or "tempdb"
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local query = stdnse.get_script_args( {'ms-sql-query.query', 'mssql-query.query' } ) or "SELECT @@version version"
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local helper = mssql.Helper:new()
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status, result = helper:ConnectEx( instance )
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if status then
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status, result = helper:LoginEx( instance, database )
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if ( not(status) ) then result = "ERROR: " .. result end
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end
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if status then
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status, result = helper:Query( query )
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if ( not(status) ) then result = "ERROR: " .. result end
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end
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helper:Disconnect()
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if status then
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result = mssql.Util.FormatOutputTable( result, true )
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result["name"] = string.format( "Query: %s", query )
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end
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return result
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end
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local do_action
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do_action, portrule, hostrule = mssql.Helper.InitScript(process_instance)
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action = function(...)
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local scriptOutput = do_action(...)
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if ( not( stdnse.get_script_args( {'ms-sql-query.query', 'mssql-query.query' } ) ) ) then
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table.insert(scriptOutput, 1, "(Use --script-args=ms-sql-query.query='<QUERY>' to change query.)")
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end
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return stdnse.format_output( true, scriptOutput )
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end
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