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Full disclosure |
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IT Security and Insecurity Portal |
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[waraxe-2004-SA#029] - Remote File Inclusion in PhpNuke |
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 Posted: Mon May 17, 2004 6:08 pm |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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Let's assume we are working with PhpNuke 6.x - 7.3
Look at the beginning of the index.php and search for something like this:
| Code: |
require_once("mainfile.php");
$_SERVER['PHP_SELF'] = "modules.php";
$row = $db->sql_fetchrow($db->sql_query("SELECT main_module from ".$prefix."_main"));
$name = $row['main_module'];
$home = 1;
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Now insert right after "require_once()" this new sentence:
So after patching the code it will look like this:
| Code: |
require_once("mainfile.php");
$modpath = '';
$_SERVER['PHP_SELF'] = "modules.php";
$row = $db->sql_fetchrow($db->sql_query("SELECT main_module from ".$prefix."_main"));
$name = $row['main_module'];
$home = 1;
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In fact, the only thing you just did was the proper initializing of the variable $modpath. And that's enough to evade potential problems  |
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| Posted: Thu Jun 17, 2004 11:46 am |
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| Jeruvy |
| Regular user |
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| Joined: Jun 17, 2004 |
| Posts: 6 |
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Hi waraxe,
My first post on the board, but you've certainly seen my feedback on your disclosures.
This patch breaks several websites.
The problem is the setting of
If this is set to
| Code: | | $modpath = $nukeurl; |
then it works again, but I have noticed bugs currently in $nukeurl. You may find some fun with these. $nukeurl can be configured with just about anything, and it's used as some important links (like home).
J.
Also wanted to say I'm a fan of full-disclosure, since I don't beleive PHP-Nuke would be anywhere nearly as secure today if it wasn't for full-disclosure. |
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| Posted: Thu Jun 17, 2004 3:40 pm |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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| Thanks for feedback! And welcome to my forum! |
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Better way of fixing it: |
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| Posted: Sun Mar 05, 2006 12:48 am |
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| dragon001 |
| Beginner |
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| Joined: Mar 05, 2006 |
| Posts: 1 |
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There is a better way to fix this problem.
Just remove
$modpath
completely and use this:
define("modpath",<definition>);
I used this inside my index.php and modules.php
this is more secured, because an const. can't be overwritten.
just a little magic will do it |
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Re: Better way of fixing it: |
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| Posted: Wed Mar 08, 2006 2:40 am |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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| dragon001 wrote: | There is a better way to fix this problem.
Just remove
$modpath
completely and use this:
define("modpath",<definition>);
I used this inside my index.php and modules.php
this is more secured, because an const. can't be overwritten.
just a little magic will do it |
Yep, you are right, constants are good, because they can't be "poisoned" by attacker. |
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