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o [NSE] Merged the ms-sql branch with several improvements and changes to the
ms-sql scripts and library: - Improved version detection - Improved server discovery - Add support for named pipes - Add support for integrated authentication - Add support for connecting to instances by name or port - Improved script and library stability - Improved script and library documentation [Patrik Karlsson, Chris Woodbury]
This commit is contained in:
patrik
@@ -1,16 +1,68 @@
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-- -*- mode: lua -*-
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-- vim: set filetype=lua :
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description = [[
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Queries Microsoft SQL Server (ms-sql) for a list of databases a user has
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Queries Microsoft SQL Server (ms-sql) instances for a list of databases a user has
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access to.
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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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The script needs an account with the sysadmin server role to work.
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It needs to be fed credentials through the script arguments or from
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the scripts <code>mssql-brute</code> or <code>mssql-empty-password</code>.
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When run, the script iterates over the credentials and attempts to run
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the command until either all credentials are exhausted or until the
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command is executed.
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the command for each available set of credentials.
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NOTE: The "owner" field in the results will be truncated at 20 characters. This
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is a limitation of the <code>sp_MShasdbaccess</code> stored procedure that the
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script uses.
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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-hasdbaccess --script-args mssql.username=sa,mssql.password=sa <host>
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--
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-- @args ms-sql-hasdbaccess.limit limits the amount of databases per-user
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-- that are returned (default 5). If set to zero or less all
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-- databases the user has access to are returned.
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--
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-- @output
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-- | ms-sql-hasdbaccess:
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-- | [192.168.100.25\MSSQLSERVER]
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-- | webshop_reader
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-- | dbname owner
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-- | ====== =====
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-- | hr sa
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-- | finance sa
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-- | webshop sa
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-- | lordvader
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-- | dbname owner
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-- | ====== =====
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-- | testdb CQURE-NET\Administr
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-- |_ webshop sa
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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 http://nmap.org/book/man-legal.html"
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categories = {"auth", "discovery","safe"}
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@@ -19,54 +71,16 @@ require 'shortport'
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require 'stdnse'
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require 'mssql'
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dependencies = {"ms-sql-brute", "ms-sql-empty-password"}
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---
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-- @args mssql.username specifies the username to use to connect to
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-- the server. This option overrides any accounts found by
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-- the <code>mssql-brute</code> and <code>mssql-empty-password</code> scripts.
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--
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-- @args mssql.password specifies the password to use to connect to
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-- the server. This option overrides any accounts found by
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-- the <code>ms-sql-brute</code> and <code>ms-sql-empty-password</code> scripts.
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--
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-- @args ms-sql-hasdbaccess.limit limits the amount of databases per-user
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-- that are returned (default 5). If set to zero or less all
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-- databases the user has access to are returned.
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--
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-- @output
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-- PORT STATE SERVICE
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-- 1433/tcp open ms-sql-s
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-- | ms-sql-hasdbaccess:
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-- | webshop_reader
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-- | dbname owner
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-- | hr sa
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-- | finance sa
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-- | webshop sa
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-- | lordvader
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-- | dbname owner
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-- | testdb CQURE-NET\Administr
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-- |_ webshop sa
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dependencies = {"ms-sql-brute", "ms-sql-empty-password", "ms-sql-discover"}
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-- Version 0.1
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-- Created 01/17/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
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portrule = shortport.port_or_service(1433, "ms-sql-s")
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hostrule = mssql.Helper.GetHostrule_Standard()
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portrule = mssql.Helper.GetPortrule_Standard()
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local function table_contains( tbl, val )
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for k,v in pairs(tbl) do
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if ( v == val ) then
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return true
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end
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end
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return false
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end
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action = function( host, port )
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local status, result, helper, rs
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local username = stdnse.get_script_args('mssql.username')
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local password = stdnse.get_script_args('mssql.password') or ""
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local creds
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local function process_instance( instance )
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local status, result, rs
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local query, limit
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local output = {}
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local exclude_dbs = { "'master'", "'tempdb'", "'model'", "'msdb'" }
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@@ -90,54 +104,71 @@ action = function( host, port )
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("SELECT %s dbname, owner FROM #hasaccess WHERE dbname NOT IN(%s)"):format(limit, stdnse.strjoin(",", exclude_dbs)),
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"DROP TABLE #hasaccess" }
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if ( username ) then
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creds = {}
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creds[username] = password
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elseif ( not(username) and nmap.registry.mssqlusers ) then
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-- do we have a sysadmin?
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creds = nmap.registry.mssqlusers
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end
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-- If we don't have valid creds, simply fail silently
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if ( not(creds) ) then
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return
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end
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for username, password in pairs( creds ) do
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helper = mssql.Helper:new()
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status, result = helper:Connect(host, port)
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if ( not(status) ) then
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return " \n\n" .. result
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end
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status, result = helper:Login( username, password, nil, host.ip )
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if ( not(status) ) then
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stdnse.print_debug("ERROR: %s", result)
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break
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end
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for _, q in pairs(query) do
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status, result = helper:Query( q )
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local creds = mssql.Helper.GetLoginCredentials_All( instance )
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if ( not creds ) then
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output = "ERROR: No login credentials."
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else
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for username, password in pairs( creds ) do
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local helper = mssql.Helper:new()
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status, result = helper:ConnectEx( instance )
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if ( not(status) ) then
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output = "ERROR: " .. result
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break
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end
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if ( status ) then
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-- Only the SELECT statement should produce output
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if ( #result.rows > 0 ) then
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rs = result
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status = helper:Login( username, password, nil, instance.host.ip )
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end
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if ( status ) then
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for _, q in pairs(query) do
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status, result = helper:Query( q )
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if ( status ) then
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-- Only the SELECT statement should produce output
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if ( #result.rows > 0 ) then
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rs = result
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end
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end
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end
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end
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end
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helper:Disconnect()
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if ( status and rs) then
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result = mssql.Util.FormatOutputTable( rs, true )
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result.name = username
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if ( RS_LIMIT > 0 ) then
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result.name = result.name .. (" (Showing %d first results)"):format(RS_LIMIT)
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end
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table.insert( output, result )
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end
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end
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helper:Disconnect()
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return stdnse.format_output( true, output )
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if ( status and rs ) then
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result = mssql.Util.FormatOutputTable( rs, true )
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result.name = username
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if ( RS_LIMIT > 0 ) then
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result.name = result.name .. (" (Showing %d first results)"):format(RS_LIMIT)
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end
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table.insert( output, result )
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end
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end
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end
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local instanceOutput = {}
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instanceOutput["name"] = string.format( "[%s]", instance:GetName() )
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table.insert( instanceOutput, output )
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return instanceOutput
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end
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action = function( host, port )
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local scriptOutput = {}
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local status, instanceList = mssql.Helper.GetTargetInstances( host, port )
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if ( not status ) then
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return stdnse.format_output( false, instanceList )
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else
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for _, instance in pairs( instanceList ) do
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local instanceOutput = process_instance( instance )
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if instanceOutput then
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table.insert( scriptOutput, instanceOutput )
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end
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end
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end
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return stdnse.format_output( true, scriptOutput )
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end
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