==================================================================== CERT-Renater Note d'Information No. 2012/VULN458 ____________________________________________________________________ DATE : 14/11/2012 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S) : Systems running Citrix XenServer versions up to and including 6.1. ====================================================================== http://support.citrix.com/article/CTX135458 ______________________________________________________________________ Citrix XenServer Multiple Security Updates Document ID: CTX135458 / Created On: 13-Nov-2012 / Updated On: 13-Nov-2012 Severity: Medium Description of Problem A number of security vulnerabilities have been identified in Citrix XenServer. These vulnerabilities affect all currently supported versions of Citrix XenServer up to and including version 6.1. The following denial of service vulnerabilities have been addressed: Timer overflow DoS vulnerability (CVE-2012-4535) pirq range check DoS vulnerability (CVE-2012-4536) Memory mapping failure DoS vulnerability (CVE-2012-4537) Unhooking empty PAE entries DoS vulnerability (CVE-2012-4538) Grant table hypercall infinite loop DoS vulnerability (CVE-2012-4539) XENMEM_add_to_physmap DoS vulnerability (CVE-2012-4557) What Customers Should Do Hotfixes have been released to address these issues in all supported versions and update levels of Citrix XenServer. Citrix strongly recommends that customers using Citrix XenServer identify and apply the hotfixes that relate to their deployed versions: Citrix XenServer 6.1: http://support.citrix.com/article/ctx135469 Citrix XenServer 6.0.2: http://support.citrix.com/article/ctx135467 Citrix XenServer 6.0.2 CC: Customers using Citrix XenServer 6.0.2 in the Common Criteria evaluated configuration should apply the following hotfixes: http://support.citrix.com/article/ctx135468 Please note that the Common Criteria Target Of Evaluation (TOE) is not affected by the vulnerabilities disclosed in this bulletin. Citrix XenServer 6.0.0: http://support.citrix.com/article/ctx135466 Citrix XenServer 5.6 Service Pack 2: http://support.citrix.com/article/ctx135465 Citrix XenServer 5.6 Feature Pack 1: http://support.citrix.com/article/ctx135464 Citrix XenServer 5.6: http://support.citrix.com/article/ctx135462 Citrix XenServer 5.6 CC: Customers using Citrix XenServer 5.6 in the Common Criteria evaluated configuration should apply the following hotfixes: http://support.citrix.com/article/ctx135463 Please note that the Common Criteria Target Of Evaluation (TOE) is not affected by the vulnerabilities disclosed in this bulletin. Citrix XenServer 5.5 Update 2: http://support.citrix.com/article/ctx135461 Citrix XenServer 5.0 Update 3: http://support.citrix.com/article/ctx135460 Customers using Citrix CloudPlatform, previously known as Citrix CloudStack, that use XenServer are recommended to apply the hotfix relevant to their version of XenServer. 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 secure@citrix.com 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: XenServer 5.0 Update 3 XenServer 5.5 XenServer 5.6 XenServer 5.6 Common Criteria XenServer 5.6 FP 1 XenServer 5.6 SP 2 XenServer 6.0 XenServer 6.0.2 XenServer 6.0.2 Common Criteria XenServer 6.1.0 ========================================================= Serveur de référence du CERT-Renater https://services.renater.fr/ssi/ ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23 - 25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================