Advisory ID: HTB23174
Product: Feng Office
Vendor: Secure Data SRL
Vulnerable Version(s): 2.3.2-rc and probably prior
Tested Version: 2.3.2-rc
Advisory Publication:  September 18, 2013  [without technical details]
Vendor Notification: September 18, 2013 
Public Disclosure: October 9, 2013 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-5744
Risk Level: Medium 
CVSSv2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status: Solution Available
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 Feng Office, 
which can be exploited to perform Cross-Site Scripting (XSS) attacks against 
users of vulnerable application.


1) Cross-Site Scripting (XSS) in Feng Office: CVE-2013-5744

1.1 The vulnerability exists due to insufficient sanitisation of user-supplied 
data in "ref_[any]" HTTP GET parameter passed to "/index.php" script. A remote 
attacker can trick a logged-in user to open a specially crafted link and 
execute arbitrary HTML and script code in browser in context of the vulnerable 
website.

The exploitation example below uses JavaScript "alert()" function to display 
user's cookies:

http://[host]/index.php?c=access&a=login&ref_abc=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E



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Solution:

Vendor did not reply to 3 notifications by email, 1 notification by twitter, 1 
notification by contact form on website, 1 forum thread, 1 support ticket. 
Currently we are not aware of any official solution for this vulnerability.

Unofficial patch was developed by High-Tech Bridge Security Research Lab and is 
available here: https://www.htbridge.com/advisory/HTB23174-patch.zip

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References:

[1] High-Tech Bridge Advisory HTB23174 - 
https://www.htbridge.com/advisory/HTB23174 - Cross-Site Scripting (XSS) in Feng 
Office.
[2] Feng Office - http://www.fengoffice.com - Feng Office is a Web-based 
Software that integrates Project Management, Client Relationship Management, 
Billing, Financing, among other features that help you efficiently run your 
Professional Services Business.
[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.

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