SQL Injection

SQL injection is a code injection technique, used to attack data-driven applications, in which nefarious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker).[1] SQL injection must exploit a security vulnerabilityin an application's software, for example, when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is not strongly typed and unexpectedly executed. SQL injection is mostly known as an attack vector for websites but can be used to attack any type of SQL database.
SQL injection attacks allow attackers to spoof identity, tamper with existing data, cause repudiation issues such as voiding transactions or changing balances, allow the complete disclosure of all data on the system, destroy the data or make it otherwise unavailable, and become administrators of the database server.
SQL injection is a code injection technique that might destroy your database.
SQL injection is one of the most common web hacking techniques.
SQL injection is the placement of malicious code in SQL statements, via web page input.


Example

txtUserId = getRequestString("UserId");

txtSQL = "SELECT * FROM Users WHERE UserId = "+txtUserId;

Comments

Post a Comment

Popular posts from this blog

Google Hacking Guide

Image
Google Hacking Guide Resource from           By Ken Foster – KMBL Security For educational purposes only.    Not for use in matters or on sites you are not implicitly and legally approved to research By Ken Foster – KMBL Security                    What is Google hacking? The purpose of Google Hacking is to leverage the vast amounts of data that are stored and indexed in search engines to produce unique results that quickly identify sensitive information, vulnerable systems, and network tactics and methods used by their hosts.    These methods are beneficial to security professionals, ethical hackers, and unfortunately black hats.    Who is Google Hacking? Google hacking has become very popular among security testers, ethical hackers, and unfortunately script kiddies and hackers who all too well understand its value. Is it Illegal? This is debatable and dependent upon the country or state you live in and the location of the target.   As a
Read more

Sanitizing application text fields

Image
  Sanitizing application text fields to prevent SQL injections and vulnerabilities involves several best practices.   Use Parameterized Queries or Prepared Statements: Instead of directly concatenating user input into SQL queries, use parameterized queries or prepared statements provided by your programming language's database API. These methods separate the SQL query logic from the user input, making it impossible for an attacker to inject malicious SQL code. Input Validation: Validate all user input to ensure it adheres to expected formats and ranges. Reject input that contains unexpected characters or patterns that could be indicative of SQL injection attempts. Use Whitelisting: Instead of blacklisting specific characters or patterns, consider whitelisting allowed characters and formats for input fields. This approach is generally safer as it explicitly defines what is acceptable rather than attempting to identify and filter out malicious input. Escape Special Characters: If y
Read more