full-disclosure - Re: Vulnerabilities in MaxSite Anti Spam Image for WordPress

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Date: Thu, 31 Mar 2011 23:35:50 +1100
From: John Belushae <john.belushae@...il.com>
To: MustLive <mustlive@...security.com.ua>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Vulnerabilities in MaxSite Anti Spam Image
	for WordPress

Hello Mueslix !

I want to warm you about Insufficient Content Filtering on FD.

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

2005.12.24 - Mueslix got a computer
2005.12.31 - His friends didn't want to go out with him, so he read owasp
instead
2006.01.02 - Found his first FDP
2011.03.29 - Still spaming this list with FDP, and an horribly broken En.


On Thu, Mar 31, 2011 at 11:22 PM, MustLive <mustlive@...security.com.ua>wrote:

> Hello list!
>
> I want to warn you about Insufficient Anti-automation vulnerability in
> MaxSite Anti Spam Image plugin for WordPress.
>
> This is modified version of original plugin Anti Spam Image, about
> vulnerability in which I wrote in 2007 in my project Month of Bugs in
> Captchas. This captcha is vulnerable to session reusing with constant
> captcha bypass method, like original Anti Spam Image, on which base this
> plugin is made.
>
> -------------------------
> Affected products:
> -------------------------
>
> Vulnerable are MaxSite Anti Spam Image 0.6 and potentially all other
> versions of this plugin.
>
> ----------
> Details:
> ----------
>
> Insufficient Anti-automation (WASC-21):
>
> Exploit:
>
>
> http://websecurity.com.ua/uploads/2011/MaxSite%20Anti%20Spam%20Image%20CAPTCHA%20bypass.html
>
> Vulnerability has place on old versions of PHP. It shows only in PHP <
> 4.4.7, which has bug which leads to error in work of web application's
> algorithm, which leads to possibility of captcha bypass.
>
> ------------
> Timeline:
> ------------
>
> 2007.12.01 - found vulnerability.
> 2007.12.01 - informed developer.
> 2011.03.29 - disclosed at my site.
>
> I mentioned about this vulnerability at my site
> (http://websecurity.com.ua/5045/).
>
> Best wishes & regards,
> MustLive
> Administrator of Websecurity web site
> http://websecurity.com.ua
>
>
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