The wonders of technology! Every sock you see exists in a database on some server somewhere. You're shopping for socks and you're looking at a Technicolor world of colorful socks, all available with a click of your mouse. Imagine going to your favorite online clothing site. Put simply, a SQL injection is when criminal hackers enter malicious commands into web forms, like the search field, login field, or URL, of an unsecure website to gain unauthorized access to sensitive and valuable data. This is where SQL injections come into play. But these databases can also contain more sensitive and valuable data like usernames and passwords, credit card information, and social security numbers. When a user needs to access database information, SQL is used to access and present that data to the user. These databases contain things like prices and inventory levels for online shopping sites.
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“A SQLI is a type of attack by which cybercriminals exploit software vulnerabilities in web applications for the purpose of stealing, deleting, or modifying data, or gaining administrative control over the systems running the affected applications.” How does a SQL injection work?ĭeveloped in the early 70s, SQL (short for structured query language) is one of the oldest programming languages still in use today for managing online databases. With that, let's take the first step in defending against a SQL injection by educating ourselves on the topic.
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Small-to-medium sized businesses are especially vulnerable as they are often not familiar with the techniques cybercriminals use in a SQLI attack and, likewise, don't know how to defend against such an attack. One study by the Ponemon Institute on The SQL Injection Threat & Recent Retail Breaches found that 65% of the businesses surveyed were victims of a SQLI-based attack.įrequently targeted web applications include: social media sites, online retailers, and universities. In fact, if you have a website or online business, cybercriminals have likely tried using the SQLI to try and break into your website already. All they have to do is input the URL of the target site and watch the stolen data roll in.Īnd yet SQLI attacks are commonplace and happen every day. Once they've found a suitable target, SQLI attackers can use automated programs to effectively carry out the attack for them.
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SQLI attacks are so easy, in fact, attackers can find vulnerable websites using advanced Google searches, called Google Dorking.
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Malwarebytes Labs ranked SQLI as number three in the The Top 5 Dumbest Cyber Threats that Work Anyway, citing the fact that SQLI is a known, predictable attack with easily implemented countermeasures. Target, Yahoo, Zappos, Equifax, Epic Games, TalkTalk, LinkedIn, and Sony Pictures-these companies were all hacked by cybercriminals using SQL injections.Ī SQLI is a type of attack by which cybercriminals exploit software vulnerabilities in web applications for the purpose of stealing, deleting, or modifying data, or gaining administrative control over the systems running the affected applications.Ĭybersecurity researchers regard the SQLI as one of the least sophisticated, easy-to-defend-against cyberthreats.
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Unit-5: Query processing and optimizationĮvaluation of relational algebra expressions, Query equivalence, Join strategies, Query optimization algorithmsĬoncurrency control, ACID property, Serializability of scheduling, Locking and timestamp based schedulers, Multi-version and optimistic Concurrency Control schemes, Database recoveryĪuthentication, Authorization and access control, DAC, MAC and RBAC models, Intrusion detection, SQL injectionīasics of SQL, DDL,DML,DCL, structure – creation, alteration, defining constraints – Primary key, foreign key, unique, not null, check, IN operator, aggregate functions, Built-in functions –numeric, date, string functions, set operations, sub-queries, correlated sub-queries, join, Exist, Any, All, view and its types.You may not know what a SQL injection (SQLI) attack is or how it works, but you definitely know about the victims. Relational algebra, Tuple and domain relational calculus, SQ元, DDL and DML constructs, Open source and Commercial DBMS - MYSQL, ORACLE, DB2, SQL serverĭomain and data dependency, Armstrong's axioms, Normal forms, Dependency preservation, Lossless design Data Abstraction, Data Independence, Data Definition Language (DDL), Data Manipulation Language (DML)Įntity-relationship model, network model, relational and object oriented data models, integrity constraints, data manipulation operations