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.