In one way or other we all are connected with internet. All web applications are dependent on the internet. Now a day's web applications play a vital role in everybody's life. In last 10 years we have observed the exponential growth in user friendly web applications. Thousands of transactions are done daily through these applications, 80% out of which are vulnerable to malicious attacks according to the survey by the Open Web Application Security Projects (OWSAP) .
SQL injections is the highest security threat for web applications .SQL injection is a technique for inserting a malicious code in user code. Results in leak of confidential information, adding or modifying data, performing denial of service, bypass authentication, table structure, network hacking and even corrupting or deleting the database.
In this paper we will thoroughly discuss the various aspects of SQL injection. In last decade the user of the internet has rapidly increased so as the web applications.web applications are the applications that can be accessed over the internet with the help of any browser on any operating system.
To serve large number of user great volume of data is stored in web applications database all around the world. Security threat in web application is becoming headache for the developers. Web applications which are not carefully designed(in terms of security) are prone to SQL injection attacks.
SQL injection is a type of code injection in the web application in which attacker add malicious code in to the user code to get unauthorized and unlimited access.
The attackers code in transmitted in such a way that it becomes a query.SQL injections are dangerous because it open the flood gate for hackers to do what they desires.SQL injections has the capability to influence the SQL query that passes to the back-end database.
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