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

["Fernando A. Lagos B." <fernando () zerial org>]

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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 () lists grok org uk
> [mailto:full-disclosure-bounces () lists grok org uk] *On Behalf Of *majinboo
> *Sent:* Monday, September 28, 2009 11:12 PM
> *To:* Fernando A. Lagos B.
> *Cc:* full-disclosure () lists 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 () zerial org
> <mailto:fernando () zerial 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 () jabberes org
GTalk && MSN: fernando () zerial org

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