News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Gareth Heyes' Blog:
Faking the unexpected
December 04, 2007 @ 08:36:04

Gareth Heyes has an example of yet another way he's seen developers incorrectly handle incoming connections and the information inside. This time, he focuses on the remote IP coming from the client.

Developers place too much trust in everything, they assume that certain data cannot be faked and therefore these pieces of data can be used as a Trojan horse. Lets take the REMOTE IP of a user, it seems a trusted source because of the TCP/IP connection between the user and the server.

He points out the difference between HTTP_X_FORWARDED_FOR and REMOTE_ADDR and how, despite them being the same almost all of the time, shouldn't be trusted since they could be spoofed. He even includes an example script showing how it could be done (and how a bit of Javascript can even be inserted).

0 comments voice your opinion now!
remoteaddr httpxforwardedfor remote ip address exploit remoteaddr httpxforwardedfor remote ip address exploit


blog comments powered by Disqus

Similar Posts

PHPClasses.org: PHP security exploit with GIF images

Stefan Esser's Blog: Watching the PHP CVS

Ed Finkler's Blog: So what is the state of secure development in PHP?

Carsten Lucke's Blog: Debugging PHP with free tools (PDT + XDebug2)

Lars Tesmer's Blog: How to Unit Test a Class Making Calls to an URL (or the Filesystem) With PHPUnit


Community Events

Don't see your event here?
Let us know!


opinion introduction release conference composer framework api symfony2 performance community example podcast php7 application configure library laravel series install interview

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework