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

Stefan Esser's Blog: Watching the PHP CVS

PHP.net: Security Notice (wiki.php.net)

Nexen.net: PHP Statistics for July 2006

Chuck Burgess' Blog: Remote CLI Debugging via Eclipse PDT

International PHP Magazine: IPM Poll Question: Which One is Most Dangerous?


Community Events





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


podcast introduction framework list api threedevsandamaybe release language bugfix application interview configure series laravel developer library code wordpress project community

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework