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SQL Injection Attacks by Example
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SUMMARY
SQL Injection is caused by unverified/unsanitized user input, and its main
idea is to convince the application to run SQL code that it was not
intended to run.
If the application is creating SQL strings naively, i.e. on the fly, and
then running them, it's straightforward to create some real surprises.
There have been other papers on SQL injection, including some that are
much more detailed, but this one shows the rationale of discovery as much
as the process of exploitation.
DETAILS
Introduction:
A customer asked that Steve Friedl check out his intranet site, which was
used by the company's employees and customers. This was part of a larger
security review, and though Steve Friedl had not actually used SQL
injection to penetrate a network before, Steve Friedl was pretty familiar
with the general concepts. Steve Friedl was completely successful in this
engagement, and wanted to recount the steps taken as an illustration.
ADDITIONAL INFORMATION
The information has been provided by <mailto:steve@unixwiz.net> Steve
Friedl.
The original article can be found at:
<http://www.unixwiz.net/techtips/sql-injection.html>
http://www.unixwiz.net/techtips/sql-injection.html
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