full-disclosure - Re: Full Path Disclosure in most wordpress' plugins [?]

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Message-ID: <4AC13402.5080301@zerial.org>
Date: Mon, 28 Sep 2009 18:09:06 -0400
From: "Fernando A. Lagos B." <fernando@...ial.org>
To: Glafkos Charalambous <info@...osec.org.uk>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Full Path Disclosure in most
 wordpress'	plugins [?]

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Glafkos Charalambous wrote:
> Hello,
> 

Hi Glafkos,

>  
> 
> That definitely can be fixed easily with two lines of code but is still
> something that should have been prevented at earlier stages of "plugin"
> development
> 
>  
> 
> "if (!empty($_SERVER['SCRIPT_FILENAME']) && 'akismet.php' ==
> basename($_SERVER['SCRIPT_FILENAME']))
> 
>  die ('Please do not load this page directly');"
> 
>  

It is a simple and good fix.

> 
> From the server side you can set PHP "warning" and "errors" OFF either
> through php.ini or PHP page itself but sometimes that's not an option

Yep, if you disable the "display_errors" option on php.ini is not a good
option. Setting display_erros to Off hides the problem but not fix the
problem.

> 
>  
> 
> Regards,

cheers

> 
> Glafkos Charalambous
> 
>  
> 
>  
> 
> *From:* full-disclosure-bounces@...ts.grok.org.uk
> [mailto:full-disclosure-bounces@...ts.grok.org.uk] *On Behalf Of *majinboo
> *Sent:* Monday, September 28, 2009 11:12 PM
> *To:* Fernando A. Lagos B.
> *Cc:* full-disclosure@...ts.grok.org.uk
> *Subject:* Re: [Full-disclosure] Full Path Disclosure in most wordpress'
> plugins [?]
> 
>  
> 
> Hello,
> 
> this kind of "vulnerabilities" exists whenever a PHP scripts issue a
> fatal error on a poorly configured server. PHP should log errors in a
> local file and not on the client screen. With this configuration, you
> will not see a full path disclosure in each uncatched PHP exception.
> IMHO the security weakness is on the php.ini and not on the web application.
> 
> cheers,
> 
> majinboo
> 
> 2009/9/28 Fernando A. Lagos B. <fernando@...ial.org
> <mailto:fernando@...ial.org>>
> 
> Exists an call to add_action() without validate with function_exists().
> When I run the php script directly, I get the full path of wp installation.
> 
> Example:
> [+] http://www.marco2010.cl/wp-content/plugins/akismet/akismet.php
> [+] http://www.marco2010.cl/wp-content/plugins/hello.php
> 
> 
> Is a bug? Is a feature?
> 
> More details posted in my blog:
> http://blog.zerial.org/seguridad/vulnerabilidad-en-la-mayoria-de-los-plugins-para-wordpress/
> (spanish)
> 
> 
> cheers.





- --
Fernando A. Lagos Berardi - Zerial
Desarrollador y Programador Web
Seguridad Informatica
Linux User #382319
Blog: http://blog.zerial.org
Skype: erzerial
Jabber: zerial@...beres.org
GTalk && MSN: fernando@...ial.org

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