sql-injection

What is the safest way to run queries on mysql, I am aware of the dangers involved with MySQL and SQL injection. However I do not know how I should run my queries to prevent injection on the variables to which other users (webclients) can manipulate. I used to write my own escape function, but apparently this is "not-done". What should I use and how should I use it to query and do inserts safely on a MySQL database through python without risking mysql injection? Bruno To avoid injections, use execute with %s in place of each variable, then pass the value via a list or tuple as the second

I have seen a few people on here state that concatenating queries using mysql_real_escape_string will not protect you (entirely) from SQL injection attacks. However, I am yet to see an example of input that illustrates an attack that mysql_real_escape_string would not protect you from. The majority of examples forget that mysql_query is limited to one query and use mysql_real_escape_string incorrectly. The only example I can think of is the following: mysql_query('DELETE FROM users WHERE user_id = '.mysql_real_escape_string($input)); This would not protect you from the following input: 5 OR 1

We are having another discussion here at work about using parametrized sql queries in our code. We have two sides in the discussion: Me and some others that say we should always use parameters to safeguard against sql injections and the other guys that don't think it is necessary. Instead they want to replace single apostrophes with two apostrophes in all strings to avoid sql injections. Our databases are all running Sql Server 2005 or 2008 and our code base is running on .NET framework 2.0. Let me give you a simple example in C#: I want us to use this: string sql = "SELECT * FROM Users WHERE

I just inherited a project because the last developer left. The project is built off of Code Igniter. I've never worked with Code Igniter before. I took a quick look at the code and I see database calls in the controller like this: $dbResult = $this->db->query("SELECT * FROM users WHERE username = '".$_POST['user_name']."'"); or calls like this: $dbResult = $this->db->query("SELECT * FROM users WHERE username = '".$this->input->post('username')."'"); Does code igniter automatically sanitize these queries to prevent sql injection? MarioRicalde CodeIgniter DOES ESCAPE the variables you pass by

There's a comment in another question that says the following: "When it comes to database queries, always try and use prepared parameterised queries. The mysqli and PDO libraries support this. This is infinitely safer than using escaping functions such as mysql_real_escape_string." Source So, what i want to ask is: Why are prepared parameterized queries more secure? An important point that I think people here are missing is that with a database that supports parameterized queries, there is no 'escaping' to worry about. The database engine doesn't combine the bound variables into the SQL