229 lines
7.2 KiB
Lua
229 lines
7.2 KiB
Lua
local brute = require "brute"
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local coroutine = require "coroutine"
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local creds = require "creds"
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local io = require "io"
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local nmap = require "nmap"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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local tns = require "tns"
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local openssl = stdnse.silent_require "openssl"
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description = [[
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Performs brute force password auditing against Oracle servers.
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Running it in default mode it performs an audit against a list of common
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Oracle usernames and passwords. The mode can be changed by supplying the
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argument oracle-brute.nodefault at which point the script will use the
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username- and password- lists supplied with Nmap. Custom username- and
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password- lists may be supplied using the userdb and passdb arguments.
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The default credential list can be changed too by using the brute.credfile
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argument. In case the userdb or passdb arguments are supplied, the script
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assumes that it should run in the nodefault mode.
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In modern versions of Oracle password guessing speeds decrease after a few
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guesses and remain slow, due to connection throttling.
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WARNING: The script makes no attempt to discover the amount of guesses
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that can be made before locking an account. Running this script may therefor
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result in a large number of accounts being locked out on the database server.
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]]
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---
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-- @see oracle-brute-stealth.nse
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--
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-- @usage
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-- nmap --script oracle-brute -p 1521 --script-args oracle-brute.sid=ORCL <host>
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--
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-- @output
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-- PORT STATE SERVICE REASON
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-- 1521/tcp open oracle syn-ack
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-- | oracle-brute:
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-- | Accounts
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-- | system:powell => Account locked
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-- | haxxor:haxxor => Valid credentials
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-- | Statistics
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-- |_ Perfomed 157 guesses in 8 seconds, average tps: 19
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--
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-- @args oracle-brute.sid - the instance against which to perform password
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-- guessing
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-- @args oracle-brute.nodefault - do not attempt to guess any Oracle default
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-- accounts
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--
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-- Version 0.3
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-- Created 07/12/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
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-- Revised 07/23/2010 - v0.2 - added script usage and output and
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-- - oracle-brute.sid argument
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-- Revised 07/25/2011 - v0.3 - added support for guessing default accounts
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-- changed code to use ConnectionPool
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-- Revised 03/13/2012 - v0.4 - revised by László Tóth
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-- added support for SYSDBA accounts
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-- Revised 08/07/2012 - v0.5 - revised to suit the changes in brute
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-- library [Aleksandar Nikolic]
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--
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-- Summary
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-- -------
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-- x The Driver class contains the driver implementation used by the brute
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-- library
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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 = {"intrusive", "brute"}
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portrule = shortport.port_or_service(1521, "oracle-tns", "tcp", "open")
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local ConnectionPool = {}
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local sysdba = {}
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Driver =
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{
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new = function(self, host, port, sid )
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local o = { host = host, port = port, sid = sid }
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setmetatable(o, self)
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self.__index = self
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return o
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end,
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--- Connects performs protocol negotiation
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--
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-- @return true on success, false on failure
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connect = function( self )
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local MAX_RETRIES = 10
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local tries = MAX_RETRIES
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self.helper = ConnectionPool[coroutine.running()]
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if ( self.helper ) then return true end
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self.helper = tns.Helper:new( self.host, self.port, self.sid, brute.new_socket() )
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-- This loop is intended for handling failed connections
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-- A connection may fail for a number of different reasons.
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-- For the moment, we're just handling the error code 12520
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--
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-- Error 12520 has been observed on Oracle XE and seems to
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-- occur when a maximum connection count is reached.
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local status, data
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repeat
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if ( tries < MAX_RETRIES ) then
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stdnse.debug2("Attempting to re-connect (attempt %d of %d)", MAX_RETRIES - tries, MAX_RETRIES)
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end
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status, data = self.helper:Connect()
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if ( not(status) ) then
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stdnse.debug2("ERROR: An Oracle %s error occurred", data)
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self.helper:Close()
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else
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break
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end
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tries = tries - 1
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stdnse.sleep(1)
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until( tries == 0 or data ~= "12520" )
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if ( status ) then
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ConnectionPool[coroutine.running()] = self.helper
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end
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return status, data
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end,
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--- Attempts to login to the Oracle server
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--
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-- @param username string containing the login username
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-- @param password string containing the login password
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-- @return status, true on success, false on failure
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-- @return brute.Error object on failure
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-- creds.Account object on success
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login = function( self, username, password )
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local status, data = self.helper:Login( username, password )
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if ( sysdba[username] ) then
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return false, brute.Error:new("Account already discovered")
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end
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if ( status ) then
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self.helper:Close()
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ConnectionPool[coroutine.running()] = nil
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return true, creds.Account:new(username, password, creds.State.VALID)
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-- Check for account locked message
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elseif ( data:match("ORA[-]28000") ) then
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return true, creds.Account:new(username, password, creds.State.LOCKED)
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-- Check for account is SYSDBA message
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elseif ( data:match("ORA[-]28009") ) then
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sysdba[username] = true
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return true, creds.Account:new(username .. " as sysdba", password, creds.State.VALID)
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-- check for any other message
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elseif ( data:match("ORA[-]%d+")) then
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stdnse.debug3("username: %s, password: %s, error: %s", username, password, data )
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return false, brute.Error:new(data)
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-- any other errors are likely communication related, attempt to re-try
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else
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self.helper:Close()
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ConnectionPool[coroutine.running()] = nil
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local err = brute.Error:new(data)
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err:setRetry(true)
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return false, err
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end
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return false, brute.Error:new( data )
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end,
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--- Disconnects and terminates the Oracle TNS communication
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disconnect = function( self )
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return true
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end,
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}
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local function fail (err) return stdnse.format_output(false, err) end
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action = function(host, port)
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local DEFAULT_ACCOUNTS = "nselib/data/oracle-default-accounts.lst"
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local sid = stdnse.get_script_args('oracle-brute.sid') or
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stdnse.get_script_args('tns.sid')
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local engine = brute.Engine:new(Driver, host, port, sid)
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local mode = "default"
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if ( not(sid) ) then
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return fail("Oracle instance not set (see oracle-brute.sid or tns.sid)")
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end
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local helper = tns.Helper:new( host, port, sid )
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local status, result = helper:Connect()
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if ( not(status) ) then
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return fail("Failed to connect to oracle server")
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end
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helper:Close()
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local f
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if ( stdnse.get_script_args('userdb') or
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stdnse.get_script_args('passdb') or
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stdnse.get_script_args('oracle-brute.nodefault') or
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stdnse.get_script_args('brute.credfile') ) then
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mode = nil
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end
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if ( mode == "default" ) then
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f = nmap.fetchfile(DEFAULT_ACCOUNTS)
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if ( not(f) ) then
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return fail(("Failed to find %s"):format(DEFAULT_ACCOUNTS))
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end
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f = io.open(f)
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if ( not(f) ) then
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return fail(("Failed to open %s"):format(DEFAULT_ACCOUNTS))
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end
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engine.iterator = brute.Iterators.credential_iterator(f)
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end
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engine.options.script_name = SCRIPT_NAME
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status, result = engine:start()
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return result
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end
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