PHP-Nuke x.x SQL Injection

[Pedro Inacio <pedro.inacio () ptnix com>]

Hello,

All PHP-Nuke versions, including the just released 6.0, are vulnerable to a
very simple SQL injection that may lead to a basic DoS attack.

For instance, if you create a short script, to send a few requests, (I have
tested with just 6) similar to this:

http://www.nukesite.com/modules.php?name=News&file=article&sid=1234%20or%
201=1

after a real short time the load of the machine is so high that it will
become inacessible.
When the script is stopped, the server will take a few minutes to recover
from the load and become acessible again.

Well, the number of requests depends on your MySQL parameters and hardware,
but in general all the tested php-nuke sites where vulnerable and become
inacessible.

If you are running PHP-Nuke, I suggest the creation of some filters to 
avoid
this kind of attack.
Other things can be made, but I will not talk about them now. I will wait
until Francisco fix them.

Francisco was noticed a month ago, but the problems persist.
Maybe he is busy reading the new revision of the "Building Secure Web 
Applications and Web Services" OWASP document. :]

Cheers,

Pedro Inacio