Full Disclosure mailing list archives

Re: WordPress Authenticated File Upload Authorisation Bypass


From: Gage Bystrom <themadichib0d () gmail com>
Date: Thu, 21 Jun 2012 08:02:26 -0700

to me it seems like hes trying to say that someone with administrative
access has the ability to....have administrative access. Its like
saying "Hey guys! I found a local exploit and all it requires is to be
a root user!!!"

I'm not sure if he's trolling or just stupid.

On Thu, Jun 21, 2012 at 7:42 AM, Greg Knaddison
<greg.knaddison () acquia com> wrote:
On Wed, Jun 20, 2012 at 8:04 PM, Denis Andzakovic
<denis.andzakovic () security-assessment com> wrote:

Exploitation of this vulnerability requires a malicious user with
access to the admin panel to use the
"/wp-admin/plugin-install.php?tab=upload" page to upload a malicious
file.


That tool is meant to allow an admin to upload arbitrary php plugins. You
can argue that this feature is insecure by design, but there are two
solutions from the WordPress perspective:

1) "Don't grant malicious users the permission to install plugins."
2) If you don't want this feature on your site at all, this feature can be
disabled in the config define( 'DISALLOW_FILE_MODS', TRUE);

By the way, two more "vulnerabilities" the theme installer has this same
issue and the upgrade tool could also be abused if you can poison the DNS of
the server.

Regards,
Greg

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_______________________________________________
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