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Taint checking is a feature in some computer programming languages, such as Perl, [1] Ruby [2] or Ballerina [3] designed to increase security by preventing malicious users from executing commands on a host computer.
A classification of SQL injection attacking vector as of 2010. In computing, SQL injection is a code injection technique used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).
Magic quotes also use the generic functionality provided by PHP's addslashes() function, which is not Unicode-aware and is still subject to SQL injection vulnerabilities in some multi-byte character encodings. Database-specific functions such as mysql_real_escape_string() or, where possible, prepared queries with bound parameters, are preferred ...
To prevent code injection problems, the person could use secure input and output handling strategies, such as: Using an application programming interface that, if used properly, is secure against all input characters. Parameterized queries allow the moving of user data out of a string to be interpreted.
String interpolation, like string concatenation, may lead to security problems. If user input data is improperly escaped or filtered, the system will be exposed to SQL injection, script injection, XML external entity (XXE) injection, and cross-site scripting (XSS) attacks. [4] An SQL injection example: query = "SELECT x, y, z FROM Table WHERE ...
Heap sprays for web browsers are commonly implemented in JavaScript and spray the heap by creating large strings. The most common technique used is to start with a string of one character and concatenate it with itself over and over. This way, the length of the string can grow exponentially up to the maximum length allowed by the scripting engine.
Other tricks are needed to produce other letters – for example by casting the string 1e1000 into a number, which gives Infinity, which in turn makes the letter y accessible. [ 13 ] The following is a list of primitive values used as building blocks to produce the most simple letters.
Various tags offer the ability to type-check input parameters (e.g. cffunction, cfparam, cfqueryparam) if the programmer declares their type specifically. This functionality is used with cfqueryparam to secure web applications and databases from hackers and malicious web requests such as SQL injection.