bugtraq - [eVuln] Chipmunk Guestbook XSS Vulnerability

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Message-ID: <20060101225810.26419.qmail@securityfocus.com>
Date: 1 Jan 2006 22:58:10 -0000
From: alex@...ln.com
To: bugtraq@...urityfocus.com
Subject: [eVuln] Chipmunk Guestbook XSS Vulnerability


New eVuln Advisory:
Chipmunk Guestbook XSS Vulnerability

--------------------Summary----------------
Vendor: Chipmunk (http://www.chipmunk-scripts.com/)
Software: Chipmunk Guestbook
Versions: 1.4 and earlier
Critical Level: Harmless
Type: Cross-Site Scripting
Class: Remote
Status: Unpatched
Exploit: Available
Solution: Not Available
Discovered by: Aliaksandr Hartsuyeu (alex@...ln.com)
Published: 2005.12.29
eVuln ID: EV0004

-----------------Description--------------
Vulnerable script:
addentry.php

Variable $homepage isn't properly sanitized. This can be used to post arbitrary script code which will be executed in the browser of every guestbook visitor.
Cookie-based authentication is threatened.

--------------Exploit---------------------
Add an entry form:
http://somesite/guestbook/addentry.php

Homepage value: '></a><script>alert(123);</script>

--------------Solution---------------------
No Patch available.

--------------Credit---------------------
Original Advisory:
http://evuln.com/vulns/4/summary.html

Discovered by: Aliaksandr Hartsuyeu (alex@...ln.com)