Hello Bugtraq!

I want to warn you about Insufficient Anti-automation and Abuse of
Functionality vulnerabilities in Joomla. Vulnerabilities exist in component
com_contact, which is a core component of Joomla.

SecurityVulns ID: 11272.

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Affected products:
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Vulnerable are all versions of Joomla with corresponding functionality
(Joomla! 1.5.22 and previous versions).

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Details:
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In details about such vulnerabilities, about sending of spam via web sites
and creating of spam-botnets it's possible to read in my article Sending
spam via sites and creating spam-botnets
(http://www.webappsec.org/lists/websecurity/archive/2010-07/msg00099.html).

Insufficient Anti-automation (WASC-21):

http://site/contact/

There is no protection at contact page from automated requests (captcha).

Abuse of Functionality (WASC-42):

http://site/contact/

Option "E-mail a copy of this message to your own address" at contact page
allows to send spam from the site to arbitrary e-mails. And with using of
Insufficient Anti-automation vulnerability it's possible to send spam from
the site in automated manner on a large scale.

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Timeline:
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2010.09.16 - announced at my site.
2010.09.18 - informed developers.
2010.09.22 - developers thanked, but ignored to fix these holes in their
system.
2010.09.22 - gave additional arguments to developers to fix these holes.
2010.11.27 - disclosed at my site.

I mentioned about these vulnerabilities at my site
(http://websecurity.com.ua/4536/).

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