Kayako Fusion 4.40.1148 Cross Site Scripting

`Advisory ID: HTB23095  
Product: Kayako Fusion  
Vendor: Kayako  
Vulnerable Version(s): 4.40.1148 and probably prior  
Tested Version: 4.40.1148  
Vendor Notification: June 6, 2012   
Public Disclosure: September 5, 2012   
Vulnerability Type: Cross-Site Scripting [CWE-79]  
CVE Reference: CVE-2012-3233  
CVSSv2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)  
Solution Status: Fixed by Vendor  
Risk Level: Medium   
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ )   
  
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Advisory Details:  
  
High-Tech Bridge SA Security Research Lab has discovered vulnerability in Kayako Fusion, which can be exploited to perform Cross-Site Scripting (XSS) attacks.  
  
  
1) Cross-Site Scripting (XSS) in Kayako Fusion: CVE-2012-3233  
  
Input appended to the URL after /__swift/thirdparty/PHPExcel/PHPExcel/Shared/JAMA/docs/download.php is not properly sanitised before being returned to the user.  
This can be exploited to execute arbitrary HTML and script code in user's browser session in context of an affected website.  
  
The following PoC (Proof of Concept) demonstrates the vulnerability:  
  
http://[host]/__swift/thirdparty/PHPExcel/PHPExcel/Shared/JAMA/docs/download.php/%27%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E  
  
Successful exploitation of this vulnerability requires that Apache's directive "AcceptPathInfo" is set to "on" or "default" (default value is "default").  
  
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Solution:  
  
Upgrade to Kayako Fusion 4.50.1581  
  
More Information:  
http://wiki.kayako.com/display/DOCS/4.50.1581  
  
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References:  
  
[1] High-Tech Bridge Advisory HTB23095 - https://www.htbridge.com/advisory/HTB23095 - Cross-Site Scripting (XSS) in Kayako Fusion.  
[2] Kayako Fusion - http://www.kayako.com - Kayako Fusion is the world's leading multi-channel helpdesk solution that enables organizations to deliver a better customer experience and work more effectively as a team, whatever their size.  
[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.   
  
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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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