OWASP NAXSI Project

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• What is Naxsi?

Naxsi is an open source, high performance, low rules maintenance, Web Application Firewall module for Nginx, the infamous web server and reverse-proxy.

Its goal is to help people securing their web applications against attacks like SQL Injections, Cross Site Scripting, Cross Site Request Forgery, Local & Remote file inclusions.

The difference with most WAF (Web Application Firewalls) out there is that it does not rely upon signatures to detect and block attacks. It uses a simpler model where, instead of trying to detect "known" attacks, it detects unexpected characters in the HTTP requests/arguments.

Each kind of unusual character will increase the score of the request. If the request reaches a score considered "too high", the request will be denied, and the user will be redirected to a "forbidden" page. Yes, it works somewhat like a spam system.

Project About

PROJECT INFO What does this OWASP project offer you?

RELEASE(S) INFO What releases are available for this project?

what is this project? Name: OWASP NAXSI Project (home page) Purpose: Naxsi (Nginx Anti Xss Sql Injection) is an open source, high performance, low rules maintenance, Web Application Firewall module for Nginx, the infamous web server and reverse-proxy. Its goal is to help people securing their web applications against attacks like SQL Injections, Cross Site Scripting, Cross Site Request Forgery, Local & Remote file inclusions. The difference with most WAF (Web Application Firewalls) out there is that it does not rely upon signatures to detect and block attacks. It uses a simpler model where, instead of trying to detect "known" attacks, it detects unexpected characters in the HTTP requests/arguments. Each kind of unusual character will increase the score of the request. If the request reaches a score considered "too high", the request will be denied, and the user will be redirected to a "forbidden" page. Yes, it works somewhat like a spam system. License: GPL 2.0 who is working on this project? Project Leader(s): Thibault "bui" Koechlin @ Project Contributor(s): Sebastien Blot Antonin Le Faucheux Didier Conchaudron Sofian Brabez how can you learn more? Project Pamphlet: Not Yet Created Project Presentation: Not Yet Created Mailing list: Mailing List Archives Project Roadmap: View Main links: Naxsi's at code.google.com Release's (Naxsi-alpha-v0.43) Assessment Process Control Key Contacts Contact Thibault "bui" Koechlin @ to contribute to this project Contact Thibault "bui" Koechlin @ to review or sponsor this project Contact the GPC to report a problem or concern about this project or to update information.

current release Please refer to googlecode for downloads : http://naxsi.googlecode.com last reviewed release Not Yet Reviewed all releases

Why it is different?

Because it works on a learning mode (read white list). Set the module in learning mode, crawl your site, and it will generate the necessary white lists to avoid false positives! Naxsi doesn't rely upon pre-defined signatures, so it should be capable to defeat complex/unknown/obfuscated attack patterns.

Project Main Page

The project is currently hosted on googlecode as well, and you may find more details here : http://naxsi.googlecode.com

Be sure to check the wiki as well ! http://code.google.com/p/naxsi/w/list

Naxsi 0.43 has just been released, you can find naxsi's last versions here : http://code.google.com/p/naxsi/downloads/list

Next steps

* Howto : See Naxsi in action !
* See Naxsi results on a highly vulnerable web site
* See Naxsi results vs Obfuscated|Complex SQLi patterns
* Try to bypass Naxsi !
* We need you!
* Naxsi is young, there are known bugs 
* LearningMode, key feature !
* Curious about Naxsi ? Check-out callgraphs and other geeky stuff !