full-disclosure - Vulnerability in Tumulus for Typepad

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Message-ID: <004101cc3376$94937130$9b7a6fd5@ml>
Date: Sat, 25 Jun 2011 23:28:19 +0300
From: "MustLive" <mustlive@...security.com.ua>
To: <submissions@...ketstormsecurity.org>, <full-disclosure@...ts.grok.org.uk>
Subject: Vulnerability in Tumulus for Typepad

Hello list!

I want to warn you about Cross-Site Scripting vulnerability in widget
Tumulus for Typepad.

-------------------------
Affected products:
-------------------------

Vulnerable are all versions of widget Tumulus for Typepad.

----------
Details:
----------

This XSS is similar to XSS vulnerability in WP-Cumulus, because it's using
tagcloud.swf made by author of WP-Cumulus. About such vulnerabilities I
wrote in 2009-2011, particularly about millions of flash files tagcloud.swf
which are vulnerable to XSS attacks I mentioned in my article XSS
vulnerabilities in 34 millions flash files
(http://lists.webappsec.org/pipermail/websecurity_lists.webappsec.org/2010-January/006033.html).

XSS (WASC-08):

http://site/path/tagcloud.swf?mode=tags&tagcloud=%3Ctags%3E%3Ca+href='javascript:alert(document.cookie)'+style='font-size:+40pt'%3EClick%20me%3C/a%3E%3C/tags%3E

At his own site the author keeps file tagcloud-download.swf, which he
recommends to rename on tagcloud.swf.

Code will execute after click. It's strictly social XSS. Also it's possible
to conduct (like in WP-Cumulus) HTML Injection attack.

------------
Timeline:
------------

2011.06.24 - disclosed at my site.
2011.06.25 - informed developer.

I mentioned about this vulnerability at my site
(http://websecurity.com.ua/5240/).

Best wishes & regards,
MustLive
Administrator of Websecurity web site
http://websecurity.com.ua 

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