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www.waraxe.us Forum Index -> Sql injection -> SQL Injection: What is safe?
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SQL Injection: What is safe?
PostPosted: Tue Jun 19, 2007 9:04 pm Reply with quote
Lord_Vader
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SQL Injection: What is safe?

I'm writing a web application and ofcourse it has to be safe, so what is safe? Since SQL Injection is a upcoming trend I need make sure my app is 100% safe from SQL Injection attacks. I don't believe you can prevent a succesfull Injection by just escape your data with mysql_real_escape_string() (PHP). What is your advice?


Lord_Vader
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PostPosted: Wed Jun 20, 2007 12:04 am Reply with quote
drag
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mysql_real_escape_string() is supposed to do a pretty good job. If magic_quotes_gpc is enabled, first apply stripslashes() to the data. Using this function on data which has already been escaped will escape the data twice. Also note mysql_real_escape_string() does not escape % and _. These are wildcards in MySQL if combined with LIKE, GRANT, or REVOKE.

Also, ensure that all user input is limited to a set length. Choose the characters that are allowed for input and manually ensure, server side, that those are the only ones that are accepted.

I think that would cover it pretty well. Correct me if I'm wrong.
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