Re: Executing PHP Code from MSSQL table

[Danux <danuxx () gmail com>]

Yeah, i understand how eval works, but i am not able to change the way
the page was programmed, so, maybe a can put something like -- <?
eval("phpinfo();") ?> -- inside the table field but after that, the
page will read: <img src= <? eval("phpinfo") ?> > but as String,
always as String.

If the php page would have been programmed with a hard coded "eval" like:

<img src= <? eval( getImagefromDB() ) > then after reading my code
inserted into the database, it would works!!!

So, the only thing a can do, is something about XSS as Jim Halfpenny said.

Thanks anyway!!!!



On 10/17/07, Matthew Lee Hinman <matthew.hinman () gmail com> wrote:
> Check out using the 'eval' operator in PHP, here's the doc page:
>
> http://us2.php.net/eval
>
>  From the page:
> "eval - Evaluate a string as PHP code"
>
> This should be able to do what you want.
>
> - Lee
>
>
> * Jim Halfpenny <jimsmailinglists () gmail com> [2007-10-16 07:52:21 +0100]:
>
> > Hi,
> > The problem with this approach is that the content is most likely
> > loaded in by the PHP preprocessor, and it will not usually go back and
> > parse any code inserted. Consider this pseudocode:
> >
> > print ("print(\"World\")")
> >
> > The preprocessor will print the string print("World") but it will not
> > execute the text string as if it were code. The same is true if the
> > text string is retrieved from a database and not a literal.
> >
> > print("<img src=\"" . getImageNameFromDB() . "\">")
> >
> > What you have is an opportunity for cross-site scripting, not PHP code
> > injection.
> >
> > Regards,
> > Jim
> >
> > On 10/16/07, Danux <danuxx () gmail com> wrote:
> > > Hi, after testing a PHP-MSSQL app, i am able to insert and update
> > > tables but i can't execute store_procedures, so, i was wondering if
> > > its possible to update a table putting something like: "phpinfo()" or
> > > (passthru("ipconfig")) in order to execute while loading the page?
> > >
> > > I mean:
> > >
> > > inside the html page the images are taken from database so... in a
> > > black box perspective a think is something like: <img src=$img> and i
> > > know where is the table which reads this image name, then i can update
> > > the table and instead of read something like $img = picture.gif, reads
> > > some thing like "phpinfo();". but as you know this is only a string,
> > > even though if i update the table with: eval("phpinfo();") its also a
> > > string .... so it dont get executed!!
> > >
> > > So, i would like you help me, what can i do if i am able to insert,
> > > create and update tables but unable to run store procedures, or bulk
> > > or bcp!!!!!
> > >
> > > Thanks!!!
> > >
> > > --
> > > Danux, CISSP
> > > Chief Information Security Officer
> > > Macula Security Consulting Group
> > > www.macula-group.com
> > >
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-- 
Danux, CISSP
Chief Information Security Officer
Macula Security Consulting Group
www.macula-group.com

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