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Around 20 years after the first reported attack of its kind, SQL (structured query language) injection (SQLi) continues to pose a major threat to web security. Back in 2012, it had been observed that every month a normal web application received four attack attempts, with retailers getting twice as many.
The hacker responsible for the SQLi attack on the Wall Street Journal website last 2014 described it as the easiest way to hack, taking only a few hours to complete.
SQL is a programming language used to manage data in a relational database management system and to stream processing in a relational data stream management system. Whenever a website has to process or display information from the database, SQL is used.
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Without securing it from vulnerabilities, hackers can inject codes and enter malicious commands into forms on the website, enabling them to siphon personal, corporate, or federal information. They can also tamper with existing data, alter transaction details, disclose or destroy all data written in the system, or even become the database administrator themselves.
The relative ease of exploiting database vulnerabilities has pushed hackers to develop various forms of injection, such as classic SQLi, blind SQLi, database management system-specific, SQLi, and compounded SQLi.
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