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www.waraxe.us Forum Index -> Remote file inclusion -> Possible Rfi? Shed Some light Please!
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Possible Rfi? Shed Some light Please!
PostPosted: Thu Oct 09, 2008 4:25 pm Reply with quote
Cablekid
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Joined: Jul 14, 2007
Posts: 85




Help me out.


Alright, i have a website that lets you upload image files.

I found out if you do http://site.com/insert_image.php?dir=..%2F..

It shows you the directory and it also lets you upload an image to that directory.

So my question is, is their any other way to maybe use a shell? I was thinking about uploading a shell but in the config.php it defines only jpgs and gifs

Code:
require('config.inc.php');
error_reporting(0);
// get the identifier of the editor
$wysiwyg = $_GET['wysiwyg'];
// set image dir
$leadon = $rootdir.$imagebasedir;

if($leadon=='.') $leadon = '';
if((substr($leadon, -1, 1)!='/') && $leadon!='') $leadon = $leadon . '/';
$startdir = $leadon;

// validate the directory
$_GET['dir'] = $_POST['dir'] ? $_POST['dir'] : $_GET['dir'];
if($_GET['dir']) {
   if(substr($_GET['dir'], -1, 1)!='/') {
      $_GET['dir'] = $_GET['dir'] . '/';
   }
   $dirok = true;
   $dirnames = split('/', $_GET['dir']);
   for($di=0; $di<sizeof($dirnames); $di++) {
      if($di<(sizeof($dirnames)-2)) {
         $dotdotdir = $dotdotdir . $dirnames[$di] . '/';
      }
   }
   if(substr($_GET['dir'], 0, 1)=='/') {
      $dirok = false;
   }

   if($_GET['dir'] == $leadon) {
      $dirok = false;
   }
   
   if($dirok) {
      $leadon = $_GET['dir'];
   }
}

// upload file
if($allowuploads && $_FILES['file']) {
   $upload = true;
   if(!$overwrite) {
      if(file_exists($leadon.$_FILES['file']['name'])) {
         $upload = false;
      }
   }
   $ext = strtolower(substr($_FILES['file']['name'], strrpos($_FILES['file']['name'], '.')+1));
   if(!in_array($ext, $supportedextentions)) {
      $upload = false;
   }
   if($upload) {
      move_uploaded_file($_FILES['file']['tmp_name'], $leadon . $_FILES['file']['name']);
   }
}

if($allowuploads) {
   $phpallowuploads = (bool) ini_get('file_uploads');      
   $phpmaxsize = ini_get('upload_max_filesize');
   $phpmaxsize = trim($phpmaxsize);
   $last = strtolower($phpmaxsize{strlen($phpmaxsize)-1});
   switch($last) {
      case 'g':
         $phpmaxsize *= 1024;
      case 'm':
         $phpmaxsize *= 1024;
   }
}

?>
[/u]
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PostPosted: Thu Oct 09, 2008 4:37 pm Reply with quote
lenny
Valuable expert
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Joined: May 15, 2008
Posts: 275
Location: United Kingdom




Do you have the entire source code? You could try to upload a php file with the image/jpeg content type - that method has worked for me several times, only problem being if the code checks file extensions from the uploaded files...
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PostPosted: Thu Oct 09, 2008 4:46 pm Reply with quote
Cablekid
Advanced user
Advanced user
 
Joined: Jul 14, 2007
Posts: 85




How dose 1 do that?

Here is the entire source.

Config.inc.php


Code:
<?php
*
 * Path to a directory which holds the images.
 */
$imagebasedir = '../../uploads';

/*
 * An absolute or relative URL to the image folder.
 * This url is used to generate the source of the image.
 */
$imagebaseurl = 'uploads';

/*
 * Allow your users to browse the subdir of the defined basedir.
 */
$browsedirs = true;

/*
 * If enabled users will be able to upload
 * files to any viewable directory. You should really only enable
 * this if the area this script is in is already password protected.
 */
$allowuploads = true;

/*
 * If a user uploads a file with the same
 * name as an existing file do you want the existing file
 * to be overwritten?
*/
$overwrite = false;

/*
 * Define the extentions you want to show within the
 * directory listing. The extensions also limit the
 * files the user can upload to your image folders.   
 */
$supportedextentions = array(
   'gif',
   'png',
   'jpeg',
   'jpg',
   'bmp'
);
         
/*
 * If you want to add your own special file icons use
 * this section below. Each entry relates to the extension of the
 * given file, in the form <extension> => <filename>.
 * These files must be located within the dlf directory.
 */
$filetypes = array (
   'png' => 'jpg.gif',
   'jpeg' => 'jpg.gif',
   'bmp' => 'jpg.gif',
   'jpg' => 'jpg.gif',
   'gif' => 'gif.gif',
   'psd' => 'psd.gif',
);
   
?>


insert_image.php

Code:
<?php
require('config.inc.php');
error_reporting(0);
// get the identifier of the editor
$wysiwyg = $_GET['wysiwyg'];
// set image dir
$leadon = $rootdir.$imagebasedir;

if($leadon=='.') $leadon = '';
if((substr($leadon, -1, 1)!='/') && $leadon!='') $leadon = $leadon . '/';
$startdir = $leadon;

// validate the directory
$_GET['dir'] = $_POST['dir'] ? $_POST['dir'] : $_GET['dir'];
if($_GET['dir']) {
   if(substr($_GET['dir'], -1, 1)!='/') {
      $_GET['dir'] = $_GET['dir'] . '/';
   }
   $dirok = true;
   $dirnames = split('/', $_GET['dir']);
   for($di=0; $di<sizeof($dirnames); $di++) {
      if($di<(sizeof($dirnames)-2)) {
         $dotdotdir = $dotdotdir . $dirnames[$di] . '/';
      }
   }
   if(substr($_GET['dir'], 0, 1)=='/') {
      $dirok = false;
   }

   if($_GET['dir'] == $leadon) {
      $dirok = false;
   }
   
   if($dirok) {
      $leadon = $_GET['dir'];
   }
}

// upload file
if($allowuploads && $_FILES['file']) {
   $upload = true;
   if(!$overwrite) {
      if(file_exists($leadon.$_FILES['file']['name'])) {
         $upload = false;
      }
   }
   $ext = strtolower(substr($_FILES['file']['name'], strrpos($_FILES['file']['name'], '.')+1));
   if(!in_array($ext, $supportedextentions)) {
      $upload = false;
   }
   if($upload) {
      move_uploaded_file($_FILES['file']['tmp_name'], $leadon . $_FILES['file']['name']);
   }
}

if($allowuploads) {
   $phpallowuploads = (bool) ini_get('file_uploads');      
   $phpmaxsize = ini_get('upload_max_filesize');
   $phpmaxsize = trim($phpmaxsize);
   $last = strtolower($phpmaxsize{strlen($phpmaxsize)-1});
   switch($last) {
      case 'g':
         $phpmaxsize *= 1024;
      case 'm':
         $phpmaxsize *= 1024;
   }
}

?>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<html>
<head>
</head>
<table width="200" border="0" cellpadding="0" cellspacing="0" style="background-color: #F7F7F7; border: 2px solid #FFFFFF; padding: 5px;">
<tr>
  <td style="width: 115px;padding-bottom: 2px; padding-top: 0px; font-family: arial, verdana, helvetica; font-size: 11px;" width="100">Alignment:</td>
   <td style="width: 85px;padding-bottom: 2px; padding-top: 0px;">
   <select name="align" id="align" style="font-family: arial, verdana, helvetica; font-size: 11px; width: 100%;">
    <option value="">Not Set</option>
    <option value="left">Left</option>
    <option value="right">Right</option>
    <option value="texttop">Texttop</option>
    <option value="absmiddle">Absmiddle</option>
    <option value="baseline">Baseline</option>
    <option value="absbottom">Absbottom</option>
    <option value="bottom">Bottom</option>
    <option value="middle">Middle</option>
    <option value="top">Top</option>
   </select>
   </td>
 </tr>
 <tr>
  <td style="padding-bottom: 2px; padding-top: 0px; font-family: arial, verdana, helvetica; font-size: 11px;">Horizontal Space:</td>
   <td style="padding-bottom: 2px; padding-top: 0px;"><input type="text" name="hspace" id="hspace" value=""  style="font-size: 10px; width: 100%;"></td>
 </tr>
 <tr>
  <td style="padding-bottom: 2px; padding-top: 0px; font-family: arial, verdana, helvetica; font-size: 11px;">Vertical Space:</td>
   <td style="padding-bottom: 2px; padding-top: 0px;"><input type="text" name="vspace" id="vspace" value=""  style="font-size: 10px; width: 100%;"></td>
 </tr>
</table>   

</td>
</tr>
</table>
</td>
<td style="vertical-align: top;width: 150px; padding-left: 5px;">
   <span style="font-family: arial, verdana, helvetica; font-size: 11px; font-weight: bold;">Select Image:</span>
   <iframe id="chooser" frameborder="0" style="height:165px;width: 180px;border: 2px solid #FFFFFF; padding: 5px;" src="select_image.php?dir=<?php echo $leadon; ?>"></iframe>
</td>
</tr>
<tr>
   <td colspan="2" align="right" style="padding-top: 5px;">
      <input type="submit" value="  Submit  " onclick="insertImage();return false;" style="font-size: 12px;">
      <?php if ( $allowuploads ) { ?>
         <input type="submit" value="  Upload  " style="font-size: 12px;">
      <?php } ?>       
      <input type="button" value="  Cancel  " onclick="window.close();" style="font-size: 12px;">   
   </td>
</tr>
</form>
</table>
</body>
</html>
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PostPosted: Thu Oct 09, 2008 6:08 pm Reply with quote
pexli
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Joined: May 24, 2007
Posts: 665
Location: Bulgaria




.php.jpg
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PostPosted: Thu Oct 09, 2008 6:49 pm Reply with quote
Cablekid
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Joined: Jul 14, 2007
Posts: 85




YES U ROCK I DID MY VERY FIRST EXPLOIT! AWSOME! MY OWN!

SWEET!
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PostPosted: Thu Oct 09, 2008 7:32 pm Reply with quote
pexli
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Joined: May 24, 2007
Posts: 665
Location: Bulgaria




Congrats:)
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PostPosted: Thu Oct 09, 2008 8:25 pm Reply with quote
Cablekid
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Joined: Jul 14, 2007
Posts: 85




How dose one go about submitting this to milw0rm.

do you send an email.
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PostPosted: Fri Oct 10, 2008 6:34 am Reply with quote
pexli
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Joined: May 24, 2007
Posts: 665
Location: Bulgaria




before you submit something on milw0rm you need to investigate why this hole working here but not working there.Google help's you.
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PostPosted: Fri Oct 10, 2008 5:13 pm Reply with quote
Cablekid
Advanced user
Advanced user
 
Joined: Jul 14, 2007
Posts: 85




Alright,

Question for ya..

When i upload the shell on some sites, it says

Code:
Forbidden
You don't have permission to access /graph/tmp/home1.php.jpg on this server.


When i go to it, Is that because the server doesn't chmod it to be readable.

If so any other way you can upload shells?
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PostPosted: Fri Oct 10, 2008 5:18 pm Reply with quote
pexli
Valuable expert
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Joined: May 24, 2007
Posts: 665
Location: Bulgaria




Cablekid wrote:
Alright,

Question for ya..

When i upload the shell on some sites, it says

Code:
Forbidden
You don't have permission to access /graph/tmp/home1.php.jpg on this server.


When i go to it, Is that because the server doesn't chmod it to be readable.

If so any other way you can upload shells?


Yep.This depend of server settings.If you try like this

/graph/tmp/home1.php
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PostPosted: Fri Oct 10, 2008 6:42 pm Reply with quote
Cablekid
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Joined: Jul 14, 2007
Posts: 85




Ya i tried like this
/graph/tmp/home1.php
and like this /graph/tmp/home1.php.jpg

same thing, so its not possible to upload php to this site?
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PostPosted: Fri Oct 10, 2008 9:08 pm Reply with quote
pexli
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Joined: May 24, 2007
Posts: 665
Location: Bulgaria




Try to upload .htaccess with

AddType application/x-httpd-php .php

try .htaccess%00
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PostPosted: Fri Oct 10, 2008 10:51 pm Reply with quote
Cablekid
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Joined: Jul 14, 2007
Posts: 85




Smart idea, i tried it still didn't work.
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