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Installation Path Disclosure Weakness in Flatnux

Advisory ID:HTB22834
Product:FlatNux
Vendor:Alessandro Vernassa
Vulnerable Versions:flatnux-2011-01.26 and probably prior
Tested Version:flatnux-2011-01.26
Advisory Publication:February 3, 2011 [without technical details]
Vendor Notification:February 3, 2011
Public Disclosure:February 17, 2011
Latest Update:January 4, 2012
Vulnerability Type:Information Exposure Through Externally-generated Error Message [CWE-211]
Risk Level:Medium
CVSSv2 Base Score:5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered a weakness in Flatnux which could be exploited to gain access to potentially sensitive information.

1) Installation path disclosure weakness in Flatnux
The weakness exists due to application reveals the full path to installation directory in an error message. A remote attacker can directly access the "config.php", "include/functions_php.php", "sections/05_Gallery/section.php", "include/extra/fck3/filemanager.php" scripts and gain knowledge of the web root directory and other potentially sensitive information. Successful exploitation requires that php_display_errors variable is on.
Exploitation examples:
http://host/config.php
http://host/include/functions_php.php
http://host/g allery.html?dir=./test
http://host/include/extra/fck3/filemanager.php

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Solution:
Upgrade to Flatnux-2011-2012-01.03.3


References:
[1] High-Tech Bridge Advisory HTB22834 - https://www.immuniweb.com/advisory/HTB22834 - Installation Path Disclosure Weakness in Flatnux
[2] Flatnux - flatnux.altervista.org - Flatnux is a CMS (Content Management System) that makes no use of DBMS, but only text files.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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