You need to use parameters instead of just concatenating together your SQL: using (SqlConnection con = new SqlConnection(–your-connection-string–)) using (SqlCommand cmd = new SqlCommand(con)) { string query = “SELECT distinct ha FROM app WHERE 1+1=2”; if (comboBox1.Text != “”) { // add an expression with a parameter query += ” AND firma = @value1 “; … Read more
Even though your question is very generic, a few rules always apply: Use parameterized queries (SqlCommand with SqlParameter) and put user input into parameters. Don’t build SQL strings out of unchecked user input. Don’t assume you can build a sanitizing routine that can check user input for every kind of malformedness. Edge cases are easily … Read more
It adds slashes to: \x00, \n, \r, \, ‘, ” and \x1a. characters. Where addslashes only adds slashes to ‘ \ and NUL Ilias article is also pretty detailed on its functionality
The character that htmlspecialchars fails to encode the critical character \0 (NUL byte), \b (backspace), as well as the \ character. In order to exploit this, you need a statement with multiple injection points. With this you can escape the closing delimiter of one string literal and thus expand it up to the next starting … Read more
The underlying db-api library for whatever database you’re using (sqlite3, psycopg2, etc.) escapes parameters. SQLAlchemy simply passes the statement and parameters to execute, the driver does whatever is needed. Assuming you are not writing raw SQL that includes parameters yourself, you are not vulnerable to injection. Your example is not vulnerable to injection.
Query q = sessionFactory.getCurrentSession().createQuery(“from LoginInfo where userName = :name”); q.setParameter(“name”, userName); List<LoginInfo> loginList = q.list(); You have other options too, see this nice article from mkyong.
Unfortunately, almost no one of the participants ever clearly understands what are they talking about. Literally. Only Kibbee managed to make it straight. This topic is all about sanitization. But the truth is, such a thing like wide-termed “general purpose sanitization” everyone is so eager to talk about is just doesn’t exist. There are a … Read more
When articles talk about parameterized queries stopping SQL attacks they don’t really explain why, it’s often a case of “It does, so don’t ask why” — possibly because they don’t know themselves. A sure sign of a bad educator is one that can’t admit they don’t know something. But I digress. When I say I … Read more
Try using a parameterized query here is a link http://www.aspnet101.com/2007/03/parameterized-queries-in-asp-net/ Also, do not use OpenQuery… use the this to run the select SELECT * FROM db…table WHERE ref = @ref AND bookno = @bookno More articles describing some of your options: http://support.microsoft.com/kb/314520 What is the T-SQL syntax to connect to another SQL Server? Edited Note: … Read more
The first and best line of defense is to not use dynamic SQL. Always use parameterized queries. Take a look at the OWASP page about SQL Injection.