SQL injection walkthrough

Tuesday, 28 May 2002, 7:26 AM EST

When a machine has only port 80 opened, your most trusted vulnerability scanner cannot return anything useful, and you know that the admin always patch his server, we have to turn to web hacking. SQL injection is one of type of web hacking that require nothing but port 80 and it might just work even if the admin is patch-happy. It attacks on the web application (like ASP, JSP, PHP, CGI, etc) itself rather than on the web server or services running in the OS.

This article does not introduce anything new, SQL injection has been widely written and used in the wild. We wrote the article because we would like to document some of our pen-test using SQL injection and hope that it may be of some use to others. You may find a trick or two but please check out the "9.0 Where can I get more info?" for people who truly deserve credit for developing many techniques in SQL injection.

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