Re: PHP Advanced Transfer Manager v1.20 ; Multiple Remote File Include Vulnerabilities
Hi,
l0x3@xxxxxxxxxxx schrieb am Sun, 10 Sep 2006 17:19:00 +0000:
>+-------------------------------------------------------------------
>
>+ Affected Software .: Software
>
>+ Version .............: PHP Advanced Transfer Manager v1.20
>
>+ Venedor ...........: http://phpatm.free.fr/
>
>+ Class .............: Remote File Inclusion
>
>+ Risk ..............: High (Remote File Ex3cut1on)
>
>+ Discovered by ..........: Eddy_BAck0o
>
>+ Contact ...........: l0x3[at]hotmail.com ; www.LEzr.com/vB
>
>+--------------------------------------------------------------------
>
>~ [Login.php]
There is no Login.php, this must be login.php...
>+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>+ include($include_location.'include/conf.php');
>
>+ include($include_location.'include/common.'.$phpExt);
>
>+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
... and there we have
v 1.20:
$include_location = $HTTP_SERVER_VARS
['DOCUMENT_ROOT'].dirname($HTTP_SERVER_VARS['PHP_SELF'])."/";
v 1.30:
$include_location = dirname($HTTP_SERVER_VARS['SCRIPT_FILENAME'])."/";
Looks like an initialization, if my eyes are not to bad. ;-)
Same with all other reported files.
If there is no way to manipulate the used HTTP_SERVER_VARS
there is no way to include something.
For sure not via $include_location.
Let's take a look at the PHP-Manual:
<http://www.php.net/manual/en/reserved.variables.php>
* DOCUMENT_ROOT
The document root directory under which the current
script is executing, as defined in the server's
configuration file.
I guess if an attacker can manipulate the server's
configuration file you have much more to worry about
as a remote file inclusion. :-)
* PHP_SELF
The filename of the currently executing script,
relative to the document root.
* SCRIPT_FILENAME
The absolute pathname of the currently executing script.
If one of them can be manipulated from remote, than that
may be a vulnerability in PHP or the webserver, but not
in the PHP-scripts.
So there is no vulnerability.
Regards
Carsten
--
Dipl.-Inform. Carsten Eilers
IT-Sicherheit und Datenschutz
<http://www.ceilers-it.de>