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o [NSE] Added new default credential list for Oracle and modified the
oracle-brute script to make use of it. [Patrik]
This commit is contained in:
patrik
@@ -1,5 +1,20 @@
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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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@@ -21,15 +36,18 @@ Performs brute force password auditing against Oracle servers.
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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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--
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-- @args oracle-brute.sid the instance against which to perform password
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-- guessing
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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 0.2
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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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author = "Patrik Karlsson"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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@@ -44,34 +62,37 @@ require 'creds'
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portrule = shortport.port_or_service(1521, "oracle-tns", "tcp", "open")
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local ConnectionPool = {}
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Driver =
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{
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new = function(self, host, port)
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local o = {}
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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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o.host = host
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o.port = port
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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 status, data
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self.helper = tns.Helper:new( self.host, self.port, nmap.registry.args['oracle-brute.sid'] )
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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 )
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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.print_debug(2, "%s: Attempting to re-connect (attempt %d of %d)", SCRIPT_NAME, MAX_RETRIES - tries, MAX_RETRIES)
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@@ -85,7 +106,11 @@ Driver =
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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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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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@@ -101,6 +126,8 @@ Driver =
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local status, data = self.helper:Login( username, password )
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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, brute.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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@@ -111,6 +138,8 @@ Driver =
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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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@@ -122,39 +151,55 @@ Driver =
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--- Disconnects and terminates the Oracle TNS communication
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disconnect = function( self )
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self.helper:Close()
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return true
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end,
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--- Perform a connection with the helper, this makes sure that the Oracle
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-- instance is correct.
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--
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-- @return status true on success false on failure
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-- @return err containing the error message on failure
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check = function( self )
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local helper = tns.Helper:new( self.host, self.port, nmap.registry.args['oracle-brute.sid'] )
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local status, err = helper:Connect()
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if( status ) then
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helper:Close()
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return true
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end
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return false, err
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end,
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}
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action = function(host, port)
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local status, result
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local engine = brute.Engine:new(Driver, host, port )
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engine.options.script_name = SCRIPT_NAME
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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( nmap.registry.args['oracle-brute.sid'] ) and not( nmap.registry.args['tns.sid'] ) ) then
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return "ERROR: Oracle instance not set (see oracle-brute.sid or tns.sid)"
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if ( not(sid) ) then
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return "\n ERROR: 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 "\n ERROR: 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 ("\n ERROR: 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 ("\n ERROR: Failed to open %s"):format(DEFAULT_ACCOUNTS)
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end
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engine:addIterator(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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