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    <p>To strictly answer your question the way you should test is by using a tool. There are 2 main types of tools you can use, a security scanner which actively probes a running website or a static analysis tool which runs on the source code you use to build your webapp. </p> <p>The short answer is you want a security scanning tool like wapiti or burp. Tools like these dynamically construct and execute security tests uniquely for your site. You could manually attempt to exploit your own site but that would take lots of time and not provide any value. It would be useless for you to go through a list of known xss or sql injection issues because each issue is unique to the site it applies to. Furthermore these tools can attack your site better then you can giving you a more rigorous security stress test. </p> <p>There are 2 main tools you can use, static analysis tools and dynamic analysis tools. Static analysis tools read in your source code, figure out the way the data flows through the app and look for security issues. At their root most security issues are allowing a user to control some data that flows into an inappropriate part of an application so even though the app isn't running and you rub up against the halting problem, static analysis method of "guessing" and trying out each code path can yield good results. Static analysis tools are language dependent and most are expensive. Some free ones are fxcop (C#), PMD and findbugs (java), see <a href="http://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis</a></p> <p>Dynamic analysis tools (more commonly just called "security scanner") require you setup your webapp so it can run tests against it, this sounds like more what you want. My favorite tool here is burp, some free ones include wapiti which is good as well. These tools will look at how your app handles data, look for inputs and fill them with malicious data in an attempt to trigger vulnerabilities. An example test would be for testing reflected cross-site scripting, the scanner would look at a page and insert javascript into every querystring value, cookie value, form value etc and then render the page to see if the malicious javascript was echod back to the page. </p> <p>You likely don't need or want a fuzzer. Fuzzing tools mostly help you when there is a lot of parsing code so a fuzzer is not the best fit for a webapp whereas it would be a good fit for a protocol you are making. There is limited fuzzing capabilities in the security scanner tools listed above and you probably don't need more then this. Fuzzers also take time to build. Fuzzers often find more stuff in c/c++ code because there are less libraries built in already doing the right thing, in the webapp case there is less "room for fuzzers to play" so to speak.</p>
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    1. POHow can I scan/fuzz my code for vulnerabilites?
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