13 December 2012
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1184 Weakness in Citrix XenDesktop could result in inconsistent propagation of USB redirection policy changes 13 December 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix XenDesktop Publisher: Citrix Operating System: Windows Impact/Access: Unauthorised Access -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2012-6314 Original Bulletin: http://support.citrix.com/article/CTX135813 - --------------------------BEGIN INCLUDED TEXT-------------------- Weakness in Citrix XenDesktop could result in inconsistent propagation of USB redirection policy changes Document ID: CTX135813 Created On: Dec 11, 2012 Updated On: Dec 11, 2012 Severity: Low 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: CVE-2012-6314 Mitigating Factors 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: EN: CTX135456 - Rollup XD560VDAWX64200 (Version 5.6.200) - For Citrix XenDesktop Virtual Desktop Agent Core Services x64 - English JA: CTX135446 - Rollup XD560VDAWX64200 (Version 5.6.200) - For Citrix XenDesktop Virtual Desktop Agent Core Services x64 - Japanese Citrix XenDesktop 5.6 FP1 VDA x86: EN: CTX135455 - Rollup XD560VDAWX86200 (Version 5.6.200) - For Citrix XenDesktop Virtual Desktop Agent Core Services x86 - English JA: CTX135445 - Rollup XD560VDAWX86200 (Version 5.6.200) - For Citrix XenDesktop Virtual Desktop Agent Core Services x86 - Japanese What Citrix Is Doing Citrix is notifying customers and channel partners about this potential security issue. This article is also available from the Citrix Knowledge Center at http://support.citrix.com/. 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. This document applies to: XenDesktop 5 x32 XenDesktop 5 x64 XenDesktop 5.5 x32 XenDesktop 5.5 x64 XenDesktop 5.6 Common Criteria XenDesktop 5.6 x32 XenDesktop 5.6 x64 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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