Total Tests:

Cross-site Scripting (XSS) Vulnerability in FanUpdate

Advisory ID:HTB23017
Product:FanUpdate
Vendor:fanupdate.co.uk
Vulnerable Versions:3.0 and probably prior
Tested Version:3.0
Advisory Publication:June 1, 2011 [without technical details]
Vendor Notification:June 1, 2011
Public Disclosure:June 22, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerability in FanUpdate which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in FanUpdate
The vulnerability exists due to input sanitation error in the "pageTitle" parameter in header.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Successful exploitation of the vulnerability requires that "register_globals" is enabled.

Exploitation example:
http://fanupdate/header.php?pageTitle=%3C/title%3E%3Cscript%3Ealert%28123%29 ;%3C/script%3E

How to Detect Cross-Site Scripting Vulnerabilities
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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB23017 - https://www.immuniweb.com/advisory/HTB23017 - Cross-site Scripting (XSS) Vulnerability in FanUpdate
[2] FanUpdate - fanupdate.co.uk - FanUpdate is a light-weight blogging script.
[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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