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IT Security and Insecurity Portal |
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SQL Injection: What is safe? |
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 Posted: Tue Jun 19, 2007 9:04 pm |
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| Lord_Vader |
| Regular user |
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| Joined: Jan 04, 2007 |
| Posts: 5 |
| Location: Netherlands |
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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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| Posted: Wed Jun 20, 2007 12:04 am |
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| drag |
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| Joined: May 31, 2007 |
| Posts: 25 |
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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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