SQL Injection Example For this SQL injection example, let’s use two database tables, Users and Contacts. The Users table may be as simple as having just three fields: ID, username, and password. The Contacts table has more information about the users, such as UserID, FirstName, LastNam...
To protect a web site from SQL injection, you can use SQL parameters. SQL parameters are values that are added to an SQL query at execution time, in a controlled manner. ASP.NET Razor Example txtUserId = getRequestString("UserId"); ...
Learn how SQL injection attacks work. Mitigate such attacks by validating input and reviewing code for SQL injection in SQL Server.
As Michael points out, only the first, parameterized queries, remedies the problem. The other two provide additional defense. The good news is that changing your ASP pages to use parameterized queries instead of just dynamically building the query is dead simple. The bad news is that MSDN does...
Use parameterized input with stored procedures Stored procedures might be susceptible to SQL injection if they use unfiltered input. For example, the following code is vulnerable: C# SqlDataAdapter myCommand =newSqlDataAdapter("LoginStoredProcedure '"+ Login.Text +"'", conn); ...
For those looking for a complete list of available techniques, including database-specific ones, theOWASP Projectmaintains aSQL Injection Prevention Cheat Sheet, which is a good place to learn more about the subject. 3.1. Parameterized Queries ...
don't need to be quoted; the driver automatically handles this. If an application exclusively uses prepared statements, the developer can be sure that no SQL injection will occur (however, if other portions of the query are being built up with unescaped input, SQL injection is still possible)...
If you are using T-SQL directly to generate dynamic SQL, you can take advantage of sp_ExecuteSql to execute parameterized queries, for example: -- An improved version of [sp_demo_injection01] CREATE PROC [sp_demo_injection02]( @name sysname ) ...
Parameterized stored procedures and parameterized SQL statements can both help reduce the likelihood of SQL injection. By using the parameters collections, you force parameters to be treated as literal values rather than executable code. You should also constrain all user input to reduce the likelihood...
Query query = session.createNativeQuery(sql); query.setParameter("name", name); JPA JPA 中使用 JPQL (Java Persistence Query Language),同时也支持 native sql,因此和 Hibernate 存在类似的问题,这里就不再细说,感兴趣的可以参考 How to How to Fix SQL Injection using the Java Persistence API (JPA) ...