Description of Problem
The USB redirection feature of Citrix XenDesktop allows a user to redirect USB devices on the client to their XenDesktop Virtual Desktop Agent (VDA).
A weakness has been identified in the Citrix XenDesktop VDA implementation of USB redirection that could result in changes to the server-side policy controlling USB redirection not being propagated to the VDA. This could allow an authenticated user to gain access to their USB devices in contravention of the updated administrator-defined policy.
This issue affects all versions of Citrix XenDesktop Virtual Desktop Agent 5.x, up to and including version 5.6.
This vulnerability has been assigned the following CVE number:
Only customers that have modified server-side policy to disable USB redirection are affected by this weakness.
What Customers Should Do
A new version of the VDA has been released to address this issue. Citrix recommends that affected customers upgrade to this version of the VDA, which can be downloaded from the following locations:
Citrix XenDesktop 5.6 FP1 VDA x64:
Citrix XenDesktop 5.6 FP1 VDA x86:
What Citrix Is Doing
Obtaining Support on This Issue
If you require technical assistance with this issue, please contact Citrix Technical Support. Contact details for Citrix Technical Support are available at http://www.citrix.com/site/ss/supportContacts.asp.
Reporting Security Vulnerabilities to Citrix
Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. If you would like to report a security issue to Citrix, please compose an e-mail to firstname.lastname@example.org stating the exact version of the product in which the vulnerability was found and the steps needed to reproduce the vulnerability.