Database security is the basis of enterprise internet security. If database security can not be ensured, enterprise sensitive information is most likely to be leaked out, posing risks to normal enterprise operating and even bringing economical losses. Actually, we can attribute many database bugs to managers' bad habits in daily operations.
Here, we have listed several commonly seen security bugs related to database security: Weak password scheme, SQL injection attack, XSS attack and data leakage and improper handling.
Surprisingly, many enterprises are using weak or default password to protect online capital of the same importance to database. However, enterprise can compulsively execute strong password scheme to tackle the issue. To be specific, enterprise managers are supposed to change password periodically and set 10-bit or more advanced password in combination of letters, symbols and numbers. In this way, database security can be maintained to some extent.
Providing that certain database receives SQL requests from malicious or invalidated data, database may suffer from SQL injection attack. For instance, attackers can provide malicious SQL requests and directly send command to database via certain way.
To prevent SQL injection attack, database managers need to make sure that all provided data are legal before those data contact with your script, data access program and SQL query. Also, XSS attack – cross-site scripting attack, which is able to access a Web server database can be prevented by verifying and clearing malicious data.
Data leakage is also a key factor which will pose high risks to database security. Once data leakage happens, managers need to carry out rational handling, for improper handling will bring many unexpected issues.
When to create database application may leak data is always neglected by many database managers. Certain error can pose risks to the security of database backup tape and lead to ineffective database access control. If managers carry out improper handling when certain error happens, some confidential and vital information of database structure will be leaked out. Therefore, to maintain database security, managers should try their best to register the error into protective log, so as to prevent the application from sending any information about the error to attackers.
To protect database security, users can start with the following aspects: Server security, application security, database connection and database access control. Just like any other server, database server should be hardened so as to prevent attackers from invading database via operating system bugs. Also, managers can set database behind application firewall. Creating a data flow diagram can help managers get secure database connection and effective access control.