I'm just forwarding this as a courtesy to the list, because Anthony accidentally just sent it to me, as opposed to "Reply-All'ing" the list. If you want more information on this subject you should search Google for "Cross Site Scripting" and "XSS". Of particular interest is this site: http://ha.ckers.org/xss.html which demonstrates various ways XSS can be exploited. Also if you aren't just echo'ing the data, but taking unsanitized data and making database calls with it, you will want to look for MySQL injection techniques. Cheers, distatica. On 8/7/07, Daniel Brown <parasane@xxxxxxxxx> wrote: > On 8/7/07, Dan <frozendice@xxxxxxxxx> wrote: > > I've always heard it is bad if you let a user type some input, then show it > > back to them w/o sanatizing the code. Eg. I have a form, where the user > > types something, they hit submit and it submits to itself then prints back > > to the user something like, account created with password: whatever they > > typed. > > > > Why and how do you sanatize what they typed before echoing it back to them? > > I figured it was something like they could type in PHP commands but I tried > > typeing phpinfo(); into the box and submitting. All that happened is that > > it echoed phpinfo(); > > > > Can someone explain this? > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > It's actually not so much for echo'ing as it is for processing the > data in another manner that makes it dangerous not to do some > sanitizing and checking.... such as database manipulation. > > -- > Daniel P. Brown > [office] (570-) 587-7080 Ext. 272 > [mobile] (570-) 766-8107 > > Hey, PHP-General list.... to give something back to everyone, you guys > can have 50% off every month on hosting plans of $10/mo. or more (list > price) at http://www.pilotpig.net/. > Use the coupon code phpgeneralaug07 > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- --------------------------------- Anthony Hiscox Video Watch Group Public Site Currently Under Development Group Members Site Fully Operational --------------------------------- -- Daniel P. Brown [office] (570-) 587-7080 Ext. 272 [mobile] (570-) 766-8107 Hey, PHP-General list.... to give something back to everyone, you guys can have 50% off every month on hosting plans of $10/mo. or more (list price) at http://www.pilotpig.net/. Use the coupon code phpgeneralaug07 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
