Hackers and malicious database administrators use SQL injection to obtain sensitive information and data in the database, delete or manipulate the database or cause denial of service (DoS) – this potentially locks the rows of the database. To remain vigilant and safe from SQL injection attacks, we compile this article presenting tips to protect your data from SQL injection attacks. You can apply whichever suits your situation and need.
Use of stored procedures
If possible allow applications to network with database only via stored procedures. In that manner, the database account that the application uses will only require authorization for executing the stored procedures, without requiring permissions for entrance into the underlying tables. Albeit the application code is vulnerable to SQL injection attacks, the attacks will fail since they lack the authorizations necessary to manipulate or access the tables. In addition, stored procedures keeps an eye on type input parameters, which possibly might help in mitigating attack in case a hacker attempts to inject value violating the type.
It is important to consider web application firewall (WAF) – weather appliance or software based. This will help in filtering out any malicious data. Good ones will have a wide-ranging set of default rules, making it easy to add new ones if need be. Web application firewall may be predominantly useful in offering security protection against certain new susceptibility before a patch is obtainable.
Don’t Disclose More Info than Necessary
Divulging extra information helps hackers to acquire a great deal of knowledge about architecture of the database from error messages, so it’s useful to ensure all your error messages display insignificant information. You can use “RemoteOnly” customError mode or its equivalent to present verbose error messages on the local machine, while making sure any potential external hacker gets not more than the point that his actions ensued in an unhandled error.
Don’t Use Dynamic SQL when it’s Avoidable
Parameterized queries, used prepared statements or stored procedures can be used in place of dynamic SQL to avoid increasing your risk of SQL injection attack, which happens when the command language is concatenated with the user input.
These are only a few tips to protect your data from SQL injection attacks, there are many more. Any of the aforementioned defenses considerably lessens the chances of successful SQL injection attack. Implementing all is the surest way of protecting the data in your database.
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- SQL Injection Scanner and Prevention Strategies
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