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

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Message-ID: <003e01ca407b$8c522830$a4f67890$@org.uk>
Date: Mon, 28 Sep 2009 23:37:44 +0300
From: "Glafkos Charalambous" <info@...osec.org.uk>
To: "'majinboo'" <majinbou@...il.com>,
	"'Fernando A. Lagos B.'" <fernando@...ial.org>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Full Path Disclosure in most
	wordpress'	plugins [?]

Hello,

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');"

>>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

Regards,

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>

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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.
- --
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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