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Query Parameterization Cheat Sheet OWASPLast revision mmddyy 0. Introduction. SQL Injection is one of the most dangerous web vulnerabilities. So much so that its the 1 item in the OWASP Top 1. It represents a serious threat because SQL Injection allows evil attacker code to change the structure of a web applications SQL statement in a way that can steal data, modify data, or potentially facilitate command injection to the underlying OS. This cheat sheet is a derivative work of the SQL Injection Prevention Cheat Sheet. Parameterized Query Examples. SQL Injection is best prevented through the use of parameterized queries. The following chart demonstrates, with real world code samples, how to build parameterized queries in most of the common web languages. The purpose of these code samples is to demonstrate to the web developer how to avoid SQL Injection when building database queries within a web application. Prepared Statement Examples Language Library. Parameterized Query. Java Standard. String custname request. Parametercustomer. Name. String query SELECT accountbalance FROM userdata WHERE username   Prepared. Statement pstmt connection. Statement query pstmt. String 1, custname. Result. Set results pstmt. Query. Java Hibernate. Patch Modern Warfare 3 3.55 on this page. Entity declare as entity. Named. Querynamefind. By. Description,queryFROM Inventory i WHERE i. Description   product. Oledbdatareader Update Query' title='Oledbdatareader Update Query' />Description. Inventory implements Serializable. String product. Description. String user. Supplied. Parameter request. ParameterProduct Description This should REALLY be validated too. Listlt Inventory list session. Named. Queryfind. By. Description. Parameterproduct. Description, user. Supplied. Parameter. Criteria API. String user. Supplied. Parameter request. QueryDesigner_3.gif' alt='Oledbdatareader Update Query' title='Oledbdatareader Update Query' />ParameterProduct Description This should REALLY be validated too. Inventory inv Inventory session. CriteriaInventory. Restrictions. eqproduct. SQL Injection vulnerabilities, and the attractiveness of the target i. You cant, because it does not generate any SQL. The parameterized query the one in CommandText is sent to the SQL Server as the equivalent of a prepared statement. Connect4-SQL-Designer_2.png' alt='Oledbdatareader Update Query' title='Oledbdatareader Update Query' />Description, user. Supplied. Parameter. Result. String query SELECT accountbalance FROM userdata WHERE username  . Ole. Db. Command command new Ole. Db. Commandquery, connection. Parameters. Addnew Ole. Db. Parametercustomer. Name, Customer. Name Name. Text. Ole. Db. Data. Reader reader command. Execute. Reader. Ole. Db. Exception se. SELECT FROM Customers WHERE Customer. Id Customer. Id. Sql. Command command new Sql. Commandsql command. Parameters. Addnew Sql. ParameterCustomer. Id, System. Data. Sql. Db. Type. Int. ParametersCustomer. Id. Value 1. Ruby Active. Record. Project. create name owasp. Project. all conditions name  , name. Project. all conditions   name name. Project. wherename   name,  name name. Project. delete name name. INSERT INTO users name, age, gender VALUES ,  INSERT INTO REGISTRY name, value VALUES name,  value. Param name, name stmt bind. Param value, value Cold Fusion. First data. Source cfsnippets. SELECT FROM str. Database. Prefixcourses WHERE int. Course. ID lt cfqueryparam value int. Course. ID CFSQLType CFSQLINTEGER. INSERT INTO foo bar, baz VALUES  ,  Stored Procedure Examples. The SQL you write in your web application isnt the only place that SQL injection vulnerabilities can be introduced. If you are using Stored Procedures, and you are dynamically constructing SQL inside them, you can also introduce SQL injection vulnerabilities. To ensure this dynamic SQL is secure, you can parameterize this dynamic SQL too using bind variables. Here are some examples of using bind variables in stored procedures in different databases. Language Library. Parameterized Query. Oracle PLSQL. Normal Stored Procedure no dynamic SQL being created. Parameters passed in to stored procedures are naturally bound to their location within the query without anything special being required. PROCEDURE Safe. Get. Balance. Query. User. ID varchar, Dept varchar AS BEGIN. SELECT balance FROM accountstable WHERE userID User. ID AND department Dept. Oracle PLSQL. Stored Procedure Using Bind Variables in SQL Run with EXECUTE. Bind variables are used to tell the database that the inputs to this dynamic SQL are data and not possibly code. PROCEDURE Another. Safe. Get. Balance. Query. User. ID varchar, Dept varchar AS. VARCHAR4. 00 result NUMBER. SELECT balance FROM accountstable WHERE userID   1. AND department   2. EXECUTE IMMEDIATE stmt INTO result USING User. ID, Dept. RETURN result. SQL Server Transact SQL. Normal Stored Procedure no dynamic SQL being created. Parameters passed in to stored procedures are naturally bound to their location within the query without anything special being required. PROCEDURE Safe. Get. Balance. Query. User. ID varchar2. 0. Dept varchar1. AS BEGIN. SELECT balance FROM accountstable WHERE userID User. ID AND department Dept. SQL Server Transact SQL. Stored Procedure Using Bind Variables in SQL Run with EXEC. Bind variables are used to tell the database that the inputs to this dynamic SQL are data and not possibly code. PROCEDURE Safe. Get. Balance. QueryUser. ID varchar2. 0. Dept varchar1. AS BEGIN. DECLARE sql VARCHAR2. SELECT sql SELECT balance FROM accountstable WHERE. ID UID AND department DPT. EXEC spexecutesql sql. UID VARCHAR2. 0, DPT VARCHAR1. The Muppet Show Sub there. UIDUser. ID, DPTDept. References. Authors and Primary Editors. Jim Manico jim at owasp. Dave Wichers dave. Neil Matatal neil at owasp. Other Cheatsheets.