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SimpGB version 1.46.02 Multiple XSS Attack Vulnerabilities



        netVigilance Security Advisory #67

SimpGB version 1.46.02 Multiple XSS Attack Vulnerabilities 
Description:
SimpGB is a guestbook with data stored in MySQL, administration interface and 
support for multiple languages. Features: Data stored in MySQL, Administration 
interface, Support for multiple languages, Support for multiple instances in 
one database, Support for multiple layouts, Own header/footer can be defined, 
Support of BBCode and smilies, Admin can decide which BBCode tags to enable, 
Avatars (with option to let users upload their own), Admin can decide which 
input fields to display and which of them are required, Admins can write 
comments on posts, Admins can mark entry as "always on top", Admins can attach 
file to entry, flood protection, IP banlist, bad word list, send email 
notification upon new posts, optionally validate new posts before they get 
visible by public, own leadtext for entry form and own "Thank you" message can 
be defined, Option to mark posts as private (only admins can see them), search 
entries, Option to let users send emails out of guestbook.
External References: 
Mitre CVE: ID requested but no answer received
NVD NIST: ID requested but no answer received
OSVDB: ID requested but no answer received
BUGTRAQ/BID:  

Summary: 
SimpGB is a guestbook with data stored in MySQL, administration interface and 
support for multiple languages.
Security problem in the product allows attackers to conduct XSS attacks.

Advisory URL: 
http://www.netvigilance.com/advisory0067
 
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 17986

Vulnerable Systems:
SimpGB version 1.46.02

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 1.47 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/?no_rgcheck=true&lang=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]/admin/emoticonlist.php?lang=1&l_emoticonlist=</title><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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