netVigilance Security Advisory #70

SimpNews version 2.41.03 Multiple XSS Attack Vulnerabilities
Description:
SimpNews is a news system written in PHP. Features: Data stored in MySQL, admin interface, support for multiple languages, support for multiple instances in one database, own header, multiple layout settings, support for BBCode andsmilies, you can assin an icon graphic to every news entry, you can attach a file to news entries, entries can be put in categories, users can subscribe to get news sent by email, search entries, users can post comments on news entries, event calendar, newsticker, option to let users propose news entries.
External References: 
Mitre CVE: CVE-2007-4874
NVD NIST: CVE-2007-4874
OSVDB: ID requested but no answer received
BUGTRAQ/BID:  

Summary: 
SimpNews is a news system written in PHP.
Security problem in the product allows attackers to conduct XSS attacks.

Advisory URL: 
http://www.netvigilance.com/advisory0070

Release Date:
09/25/2007
 
CVSS Version 2 Metrics:

Base Metrics:


Exploitability Metrics:



Access Vector:
Network


Access Complexity:
Low


Authentication:
None

Impact Metrics:



Confidentiality Impact:
Partial


Integrity Impact:
Partial


Availability Impact:
Partial
Temporal Metrics:


Exploitability:
Functional

Remediation Level:
Official Fix

Report Confidence:
Confirmed

CVSS Version 2 Vectors:

Base Vector:
"AV:N/AC:L/Au:N/C:P/I:P/A:P"
Temporal Vector:
"E:F/RL:OF/RC:C"

CVSS Version 2 Scores:

Base Score:
7.5

Impact Subscore:
6.4

Exploitability Subscore:
10
Temporal Score:
6.2
SecureScout Testcase ID:
TC 17989

Vulnerable Systems:
SimpNews version 2.41.03

Vulnerability Type:
XSS (Cross-Site Scripting) to force a web-site to display malicious contents to the target, by sending a specially crafted request to the web-site. The vulnerable web-site is not the target of attack but is used as a tool for the hacker in the attack of the victim.

Vendor:
Bosch IT-Consulting

Vendor Status: 
The Vendor has confirmed the problem and has release new version 2.42.01 that addresses the problem. New version of product was tested and we can confirm that all vulnerabilities were solved.  For more information see vendor announcement. To download the latest version go to vendors product download area.
Workaround:

Example: 
XSS Attack Vulnerability 1:
REQUEST:
http://[TARGET]/[PRODUCT DIRECTORY]/admin/layout2b.php?no_rgcheck=true&lang=1&do_login=1&l_username=</td><script>alert(document.cookies)</script><td>
REPLY:
Will execute <script>alert(document.cookie)</script>

XSS Attack Vulnerability 2:
REQUEST:
http://[TARGET]/[PRODUCT DIRECTORY]/comment.php?lang=en&mode=new&entryref=&backurl="><script>alert(document.cookies)</script>
REPLY:
Will execute =<script>alert(document.cookie)</script>

Credits: 
Jesper Jurcenoks
Co-founder netVigilance, Inc
www.netvigilance.com
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