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Cross-Site Scripting (XSS) in Feng Office

Advisory ID:HTB23174
Product:Feng Office
Vendor:Secure Data SRL
Vulnerable Versions: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
Latest Update: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
 

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%28d ocument.cookie%29;%3C/script%3E

How to Detect Cross-Site Scripting Vulnerabilities
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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.immuniweb.com/advisory/HTB23174-patch.zip


References:
[1] High-Tech Bridge Advisory HTB23174 - https://www.immuniweb.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® - Leveraging the power of machine-learning and genius of human brain to deliver the most advanced web application security and penetration testing.
[6] ImmuniWeb® SSLScan - Test your servers for security and compliance with PCI DSS, HIPAA and NIST.

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