Discover and prevent three of attacks on Web application servers

WWW, some people call it the Web, is the application of the current Internet, the fastest growing network information services, but also the most convenient and most popular information service types. Its biggest feature is integration, it can integrate a variety of applications, such as FTP, E-Mail, database, etc., this integration also makes Web services become one of the most vulnerable servers.

Of course, we are more and more concerned about security issues, there are many factors affecting security. such as viruses, spyware, vulnerabilities, and so on. And malware has a long history, far beyond our memory. This trend seems to have shown no signs of slowing, especially as Trojan horses and other malicious code are increasingly rampant today. However, the malware problem pales in comparison to the attackers ' use of vulnerable application servers to steal large amounts of critical information.

Why are Web application servers a target for attackers? The reason is simple because they are publicly accessible and tightly connected to the back-end database server, which stores a huge amount of information that makes criminals covet. So how does an attacker use a front-end Web application to hack back-end database server barriers?

SQL injection attacks

SQL injection attacks are now increasingly popular as a way to steal confidential information on the Internet. A SQL injection attack includes one such method: An attacker enters a SQL query into a Web form's search field, and if the query is accepted by the Web application, it is passed to the backend database server to execute it, which, of course, is based on read/ Write access operation is permitted under the premise. This can lead to two scenarios, one in which an attacker can view the contents of a database and an attacker who deletes the contents of a database. Whatever happens, it means disaster to the user.

Many people may think that SQL injection attacks require advanced knowledge. On the contrary, in essence, anyone who has a basic understanding of SQL and has a certain query program (which is ubiquitous on the Internet) can implement this attack.