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Category:   Application (Generic)  >   VMware Vendors:   VMware
VMware ESXi Input Validation Flaw in Host Client Lets Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1037501
SecurityTracker URL:  http://securitytracker.com/id/1037501
CVE Reference:   CVE-2016-7463   (Links to External Site)
Date:  Dec 20 2016
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.5, 6.0
Description:   A vulnerability was reported in VMware ESXi. A remote user can conduct cross-site scripting attacks.

The ESXi Host Client does not properly filter HTML code from user-supplied input before displaying the input. A remote user can create a specially crafted virtual machine that, when loaded by the target vSphere administrator, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the VMware interface and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user with privileges to manage virtual machines via the ESXi Host Client can also trigger this vulnerability.

Caleb Watt (@calebwatt15) reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the VMware interface, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   The vendor has issued a fix (ESXi550-201612102-SG, ESXi600-201611102-SG).

The vendor advisory is available at:

http://www.vmware.com/security/advisories/VMSA-2016-0023.html

Vendor URL:  www.vmware.com/security/advisories/VMSA-2016-0023.html (Links to External Site)
Cause:   Input validation error

Message History:   None.


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