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Re: Magic quotes? Should I still be cautious?

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From "M. Strobel" <sorry_no_mail_here@nowhere.dee>
Newsgroups comp.lang.php
Subject Re: Magic quotes? Should I still be cautious?
Date Fri, 06 Jan 2012 20:24:36 +0100
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Am 06.01.2012 20:14, schrieb Thomas Mlynarczyk:
> Jerry Stuckle schrieb:
>> On 1/6/2012 6:05 AM, Thomas Mlynarczyk wrote:
>>> Jerry Stuckle schrieb:
>>>
>>>> $REQUESTS is quite dangerous. You never know whether it comes
>>>> from
>>>> $_GET, $_POST or $_COOKIE, for instance.
>>>
>>> True, you don't know. But does it matter?
>>
>> No, it doesn't matter if you aren't concerned about security.
> 
> I was hoping for some objective arguments, but well...
> 
> Okay, let me rephrase this. Suppose you have a parameter foo
> which is expected to be sent via $_POST only. So if it's being
> sent via $_GET you refuse it as invalid. Okay. So all the
> attacker has to do is send it via $_POST and you will happily
> accept it. Now of course you must ensure that this foo parameter,
> even if sent via $_POST, can do no evil. You must properly
> validate it. But once you're there, you might as well accept it
> via $_GET, for what difference does it make now? You validate it,
> so it can do no harm.
> 
> I repeat: An attacker can send ANYTHING via GET or POST or COOKIE
> as he chooses. YOU, therefore, cannot say "this came via POST as
> intended, so it's safe". You must not rely on the data source.
> Therefor, the data source should be irrelevant to your
> application and your application must be designed so that it
> doesn't matter if the data comes via GET, POST or COOKIE. In
> other words: When some evil person knocks on your door, it really
> doesn't matter if he came by train or by car to your doorstep.
> The same holds for a nice guy visiting you.
> 
> Greetings,
> Thomas
> 
Quite near to a mathematical proof.

/Str.

To your signature: Dans ce cas ceux qui ont tort ne sont pas
nombreux.

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Thread

Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-29 15:55 -0500
  Re: Magic quotes? Should I still be cautious? Michael Fesser <netizen@gmx.de> - 2011-12-29 22:04 +0100
    Re: Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-29 16:53 -0500
      Re: Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-29 17:08 -0500
    Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2011-12-29 23:22 +0100
  Re: Magic quotes? Should I still be cautious? "Peter H. Coffin" <hellsop@ninehells.com> - 2011-12-29 17:53 -0600
    Re: Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-29 23:32 -0500
      Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2011-12-30 12:38 +0100
        Re: Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-30 09:52 -0500
          Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-02 15:02 +0100
      Re: Magic quotes? Should I still be cautious? Michael Fesser <netizen@gmx.de> - 2011-12-30 13:18 +0100
  Re: Magic quotes? Should I still be cautious? "Álvaro G. Vicario" <alvaro.NOSPAMTHANX@demogracia.com.invalid> - 2011-12-30 10:26 +0100
  Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2011-12-30 14:42 +0100
    Re: Magic quotes? Should I still be cautious? Michael Joel <no@please.com> - 2011-12-30 09:52 -0500
  Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-04 15:55 +0100
    Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-05 14:08 +0100
      Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-05 14:22 +0100
        Re: Magic quotes? Should I still be cautious? The Natural Philosopher <tnp@invalid.invalid> - 2012-01-05 13:36 +0000
          Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-05 15:20 +0100
            Re: Magic quotes? Should I still be cautious? The Natural Philosopher <tnp@invalid.invalid> - 2012-01-05 15:49 +0000
        Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-05 14:39 +0100
      Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 00:28 +0100
        Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-05 19:36 -0500
          Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-06 11:16 +0100
          Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-06 12:05 +0100
            Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 08:32 -0500
              Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 18:18 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 13:04 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-08 20:48 +0100
              Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-06 20:14 +0100
                Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 20:24 +0100
                Re: Magic quotes? Should I still be cautious? The Natural Philosopher <tnp@invalid.invalid> - 2012-01-06 19:34 +0000
                Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 21:11 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 18:12 -0500
                Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-07 17:59 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-07 15:54 -0500
                Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-08 02:13 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-07 20:33 -0500
                Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-09 00:21 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-08 19:05 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-08 20:52 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-08 15:59 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-11 11:00 +0100
                Re: Magic quotes? Should I still be cautious? The Natural Philosopher <tnp@invalid.invalid> - 2012-01-11 11:53 +0000
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-11 08:45 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-11 15:43 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-11 08:44 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-11 15:47 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-11 09:51 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-11 18:09 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-11 14:01 -0500
                Re: Magic quotes? Should I still be cautious? Arno Welzel <usenet@arnowelzel.de> - 2012-01-12 08:58 +0100
          Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 17:41 +0100
            Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 13:05 -0500
        Re: Magic quotes? Should I still be cautious? Erwin Moller <Since_humans_read_this_I_am_spammed_too_much@spamyourself.com> - 2012-01-06 11:07 +0100
          Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 18:05 +0100
            Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 13:07 -0500
              Re: Magic quotes? Should I still be cautious? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-06 19:45 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-06 18:09 -0500
                Re: Magic quotes? Should I still be cautious? Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-01-07 18:08 +0100
                Re: Magic quotes? Should I still be cautious? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-07 15:59 -0500

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