bugtraq - Cross-Site Scripting (XSS) in Ilch CMS

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Date: Wed,  5 Mar 2014 12:46:37 +0100 (CET)
From: High-Tech Bridge Security Research <advisory@...ridge.com>
To: bugtraq@...urityfocus.com
Subject: Cross-Site Scripting (XSS) in Ilch CMS

Advisory ID: HTB23203
Product: Ilch CMS
Vendor: http://ilch.de
Vulnerable Version(s): 2.0 and probably prior
Tested Version: 2.0
Advisory Publication:  February 12, 2014  [without technical details]
Vendor Notification: February 12, 2014 
Public Disclosure: March 5, 2014 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2014-1944
Risk Level: Medium 
CVSSv2 Base Score: 5 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in Ilch CMS, which can be exploited to perform Cross-Site Scripting (XSS) attacks against users and administrators of vulnerable application.

1) Cross-Site Scripting (XSS) in Ilch CMS: CVE-2014-1944

The vulnerability exists due to insufficient sanitisation of user-supplied data in "text" HTTP POST parameter passed to "/index.php/guestbook/index/newentry" URL. A remote unauthenticated user can send a specially crafted HTTP POST request, which allows to permanently inject and execute arbitrary HTML and script code in user’s browser in context of the vulnerable website when the victim visits the "http://[host]/index.php/guestbook/index/index" URL.

The exploitation example below uses the JavaScript "alert()" function to display "immuniweb" word:

POST /index.php/guestbook/index/newentry HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 151

ilch_token=5a528778359d4756b9b8803b48fba18b&name=name&email=email%40email.com&homepage=http%3A%2F%2Fsite.com&text=<script>alert('immuniwweb');</script>&saveEntry=Submit

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Solution:

Fixed by vendor on February 18, 2014 directly in the source code without version modification/new release. Update to the version 2.0 released after February 18, 2014.

More Information:
https://github.com/IlchCMS/Ilch-2.0/commit/381e15f39d07d3cdf6aaaa25c0f2321f817935f7
https://github.com/IlchCMS/Ilch-2.0/commit/02bb4953c0e21cb8f20e5e91db5e15a77fe1a5ce

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References:

[1] High-Tech Bridge Advisory HTB23203 - https://www.htbridge.com/advisory/HTB23203 - Cross-Site Scripting (XSS) in Ilch CMS.
[2] Ilch CMS - http://ilch.de - Ilch is an easy to use content management system for clans, communities and homepages. 
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® - http://www.htbridge.com/immuniweb/ - is High-Tech Bridge's proprietary web application security assessment solution with SaaS delivery model that combines manual and automated vulnerability testing.

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Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.