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Cross-Site Scripting (XSS) in Kayako Fusion

Advisory ID:HTB23095
Product:Kayako Fusion
Vendor:Kayako
Vulnerable Versions:4.40.1148 and probably prior
Tested Version:4.40.1148
Advisory Publication:June 6, 2012 [without technical details]
Vendor Notification:June 6, 2012
Vendor Fix:June 7, 2012
Public Disclosure:September 5, 2012
Latest Update:June 11, 2012
Vulnerability Type:Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2012-3233
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

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%3Ea lert%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").


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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