The correct way to avoid SQL injection attacks, no matter which database you use, is to separate the data from SQL, so that data stays data and will never be interpreted as commands by the SQL parser. It is possible to create an SQL statement with correctly formatted data parts, but if you don’t fully … Read more
Per the docs: Security: the default character set The character set must be set either at the server level, or with the API function mysqli_set_charset() for it to affect mysqli_real_escape_string(). See the concepts section on character sets for more information. And therein lies the reason for having the connection: how to escape your string depends … Read more
Reinventing the wheel and reinventing it the Wrong Way (TM). First of all, there are parametrized queries (available for PHP in MySQLi extension); if that’s not an option, there’s mysql_real_escape_string. This is the main issue – check for already available options before deciding to implement them on your own. Second, you are trying to call … Read more
This value: admin’);# would terminate the SQL statement after the string “admin” and treat everything after as a comment. So this: SELECT ID, name, locale, lastlogin, gender, FROM USERS_TABLE WHERE (name=”$user” OR email=”$user”) AND pass=”$pass” essentially becomes this: SELECT ID, name, locale, lastlogin, gender, FROM USERS_TABLE WHERE (name=”admin”) A record is found and the system … Read more
User input that deliberately contains SQL code to do harmful things, and isn’t disabled or sanitized by the code. E.g., $who = $_GET[‘customer_id’]; … DELETE from records WHERE customer_id = ‘$who’ could be injected with something similar to customer_id=1234′ and 1=1 and ”=’, resulting in DELETE from records WHERE customer_id = ‘1234’ and 1=1 and … Read more
There are 2 parts you want to consider: Finding as much information as you can. about the script Actually exploiting it. Jihnesh was talking about the first part. In the example Jignesh gave, you find out that the script is using MySQL, information about the server / files, and that he doesn’t check the category … Read more
It is difficult to ans your query without source code, but still try this: Try binding parameters which you pass in query instead of directly passing in it. for example: $query = UserMaster::model()->findAll(’email = :email ‘, array(‘:email’ => “[email protected]”)); Here email id is binded in an array, this will prevent sql injection to much extent. … Read more
As suggested, prepared statements are the best way to achieve good protection from SQL injection. Shortened Example You will need to add entries to fill in all columns you wish to insert. $email = $_POST[‘e-mail’]; $fn = $_POST[‘firstname’]; $ln = $_POST[‘lastname’]; if ($stmt = $mysqli->prepare(“INSERT INTO `newcartdb`.`orders`(Email,Firstname,Lastname) values(?,?,?)”) { $stmt->bind_param(“sss”, $email, $fn, $ln); “sss” – … Read more
submitAnswer() is a Javascript function and is there somewhere, if you look hard enough. No. Probably not, depending on the proficiency of the programmer who setup the PHP code. 3 solved View the php script of any site with browser [closed]
The problem is that you aren’t using it… Make this change. <?php $address = mysql_real_escape_string($_POST[‘bitcoinaddress’]); $btc = mysql_real_escape_string($_POST[‘btcamount’]); $phone = mysql_real_escape_string($_POST[‘phonenumber’]); $con = mysql_connect(“localhost”,”db user”,”password”); if (!$con) { die(‘Could not connect: ‘ . mysql_error()); } mysql_select_db(“db_name”, $con); $sql=”INSERT INTO `db_name`.`form` (`bitcoinaddress`, `btcamount`, `phonenumber`) VALUES (‘”.$address.”‘,'”.$btc.”‘,'”.$phone.”‘)”; if (!mysql_query($sql,$con)) { die(‘Error: ‘ . mysql_error()); } echo ($btc); … Read more
Most of SQL injection examples use the ;DROP TABLE students payload which is not even a thing in many software setups. This is just an example. You are making a very common mistake, confusing an injection (a possibility to inject an unwanted code into the SQL query) with an exploit (the actual payload to be … Read more
Never try and prevent SQL injection solely by JavaScript. What happens if I turn JavaScript off? Your validation fails instantly. What happens if I modify your JS and remove the keywords you are preventing me from injecting? Always validate it against the server. solved Can we protect against SQL-injection by writing Javascript code correctly? how? … Read more
You can ask the database to secure your table and column names, using quote_ident(), before you create the query you want to execute. You need something like this: <?php $table=”table name”; // unsafe $column = ‘column name’; // unsafe $result = pg_query_params($connection, ‘SELECT quote_ident(CAST($1 AS text)), quote_ident(CAST($2 AS text));’, array($table, $column) ); $table = pg_fetch_result($result, … Read more
Compiled queries use special syntax that the database understands. They usually add placeholders for parameters such as in: select * from applicant where name = ? select * from applicant where name = :name The exact syntax depends on the specific technology: JDBC, ODBC, etc. Now, once those queries are sent to the database (without … Read more
You have to bind your variables like you do in your first code. The Version 1 and Version 2 codes are both INSECURE. solved PDO prepared statements [closed]