Date: Thu, 7 Mar 2013 19:53:29 -0600
From: adam <adam@...sy.net>
To: Christian Sciberras <uuf6429@...il.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: SANS PHP Port Scanner Remote Code Execution

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On Thu, Mar 7, 2013 at 7:50 PM, Christian Sciberras <uuf6429@...il.com>wrote:

> Andrew,
>
>
> You realize this guy is trying to advise people through a tutorial?
> It's not like we're talking about average Joe shipping buggy software...
> people *teaching bad practices,* especially in this field should be shot
> dead
> before they do any more damage.
>
> You just can't learn how to code by teaching others to do it wrongly.
>
> Pointing back to my comprehensive list, the author missed some of
> the very basics of programming in general (undefined variables, no
> indentation..).
>
>
> Chris.
>
>
> On Fri, Mar 8, 2013 at 2:14 AM, Andrew King <aking1012.com@...il.com>wrote:
>
>> Has anyone considered that loads of stuff is shipped bugged?
>>
>> I mean it's not like they hosted it on their site executable.  It's also
>> not like we're talking about vsftpd where it's installed for a legitimate
>> purpose on millions if not billions of PCs.
>>
>> The million eyeball test and trolling a company where one person might
>> have to read 15 articles a day in addition to actual job duties are not
>> even in the same realm.  Add to that maybe backdoor software like sub7 had
>> administrative access backdoors.  The list goes on.  All I'm saying is
>> don't be dense.
>>
>>
>> On Wed, Mar 6, 2013 at 2:57 AM, Christian Sciberras <uuf6429@...il.com>wrote:
>>
>>> Ulisses,
>>>
>>> No, I'm blaming developers that are not in the field of security for
>>> this mess.
>>>
>>> Chris.
>>>
>>>
>>> On Wed, Mar 6, 2013 at 1:10 PM, Ulisses Montenegro <
>>> ulisses.montenegro@...il.com> wrote:
>>>
>>>> Christian
>>>>
>>>> If you're reading my email as "it's the developers' fault", then you
>>>> got it wrong -- I've been a developer for most of my life. And while things
>>>> have gotten better in the last years, there are still tons of "build your
>>>> blog 15 minutes" or "develop a twiiter clone in 2h"
>>>> tutorials/advertisements for various platforms and languages out there
>>>> which either assume security is a non-issue, or assume the
>>>> platform/language will take care of it for you.
>>>>
>>>> Heck, the manpages for some libc functions on non-GNU platforms still
>>>> show vulnerable code in examples. perldoc is riddled with code that is just
>>>> enough to show how a given function should be used, but with no validation
>>>> whatsoever. I remember reading the training material for an Oracle product
>>>> (sorry, I really can't recall the name) which touted being able to have the
>>>> application security handled by infrastructure/middleware componentes as a
>>>> desirable feature.
>>>>
>>>> So while I'd agree that we are getting better at this, we're still far
>>>> from ideal. The canonical "hello world" for most languages/platforms out
>>>> there, in most cases, still does not make explicit references to security
>>>> issues.
>>>>
>>>>
>>>> On Wed, Mar 6, 2013 at 8:49 AM, Christian Sciberras <uuf6429@...il.com>wrote:
>>>>
>>>>> The article actually recommends looking for information from
>>>>> www.w3schools.com <http://www.w3fools.com>?!
>>>>>
>>>>> Here's a few other obviously missing things:
>>>>> - script requires input but does not check for it (very bad PHP
>>>>> practice)
>>>>> - what the hell is with that code? Ever heard about indentation?
>>>>> - there should be some very basic sanitization; ints be ints and
>>>>> strings be strings
>>>>> - hiding all errors, that was a very smart thing to do....
>>>>> - early 20's html and css coding style to boot
>>>>>
>>>>> Regarding the tool itself, obviously it's not meant to be used
>>>>> publicly, hence why I could close my eye in this respect.
>>>>>
>>>>> UIlisses, developers already do this. Actually, they've been doing it
>>>>> for quite some time.
>>>>> Perhaps the "security experts" writing tutorials as in that article
>>>>> should follow?
>>>>>
>>>>>
>>>>> On Wed, Mar 6, 2013 at 11:55 AM, Dan Ballance <tzewang.dorje@...il.com
>>>>> > wrote:
>>>>>
>>>>>> +1
>>>>>> On 6 Mar 2013 10:41, "Ulisses Montenegro" <
>>>>>> ulisses.montenegro@...il.com> wrote:
>>>>>>
>>>>>>> Not including proper input validation and error handling in code
>>>>>>> samples is one of the most common and harmful practices in the software
>>>>>>> development industry -- doing it is not "optional" or "advanced", it is
>>>>>>> mandatory unless you want to be pwned.
>>>>>>>
>>>>>>> Developers need to start doing things properly from the very
>>>>>>> beginning, as habits become harder and harder to change with experience.
>>>>>>>
>>>>>>>
>>>>>>> On Wed, Mar 6, 2013 at 7:33 AM, Benji <me@...ji.com> wrote:
>>>>>>>
>>>>>>>> Actually, adding input sanitisation really wouldnt increase the
>>>>>>>> code size that much. Are you just incompetent?
>>>>>>>>
>>>>>>>>
>>>>>>>> On Wed, Mar 6, 2013 at 7:46 AM, Źmicier Januszkiewicz <gauri@....by
>>>>>>>> > wrote:
>>>>>>>>
>>>>>>>>> Dear list,
>>>>>>>>>
>>>>>>>>> Well, I suppose this had to be a proof-of-concept piece of code to
>>>>>>>>> demonstrate how port scanning can be done in PHP, not a production-grade
>>>>>>>>> software. Adding input sanitization would increase the code size by a lot
>>>>>>>>> and obscure the concept somewhat (not that there is much to be said anout
>>>>>>>>> the concept though). Think we can give the dude some discount for that.
>>>>>>>>>
>>>>>>>>> Nevertheless, seeing something like this coming from "Certified
>>>>>>>>> Ethical Hacker and Security + certified" makes me doubt the worthness of
>>>>>>>>> those certificates. Could be nice to know the exact naming of those
>>>>>>>>> certificates to properly disregard them in the future.
>>>>>>>>>
>>>>>>>>> With best regards,
>>>>>>>>> Z.
>>>>>>>>>
>>>>>>>>> 2013/3/6 laurent gaffie <laurent.gaffie@...il.com>
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> http://resources.infosecinstitute.com/php-build-your-own-mini-port-scanner/
>>>>>>>>>>
>>>>>>>>>> Finding the vulnerability in this code is left as an exercise to
>>>>>>>>>> the reader.
>>>>>>>>>>
>>>>>>>>>> PS: "*Your comment will be awaiting moderation forever."*
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Full-Disclosure - We believe in it.
>>>>>>>>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>>>>>>>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Full-Disclosure - We believe in it.
>>>>>>>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>>>>>>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Full-Disclosure - We believe in it.
>>>>>>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>>>>>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> “If debugging is the process of removing software bugs, then
>>>>>>> programming must be the process of putting them in.” - *Edsger
>>>>>>> Dijkstra*
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Full-Disclosure - We believe in it.
>>>>>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>>>>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Full-Disclosure - We believe in it.
>>>>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>>>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> “If debugging is the process of removing software bugs, then
>>>> programming must be the process of putting them in.” - *Edsger Dijkstra
>>>> *
>>>>
>>>
>>>
>>> _______________________________________________
>>> Full-Disclosure - We believe in it.
>>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>>> Hosted and sponsored by Secunia - http://secunia.com/
>>>
>>
>>
>> _______________________________________________
>> Full-Disclosure - We believe in it.
>> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
>> Hosted and sponsored by Secunia - http://secunia.com/
>>
>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
>

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