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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1085 Citrix XenServer Multiple Security Updates 14 November 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix XenServer Publisher: Citrix Operating System: Windows Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-4557 CVE-2012-4539 CVE-2012-4538 CVE-2012-4537 CVE-2012-4536 CVE-2012-4535 Original Bulletin: http://support.citrix.com/article/CTX135458 - --------------------------BEGIN INCLUDED TEXT-------------------- 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 - --------------------------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 auscert@auscert.org.au 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: auscert@auscert.org.au 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUKMC/+4yVqjM2NGpAQKjlw//VnM91s9Ut3YW9sSjluGpWJPmGywShAO0 AO3XzEyMLUBVcwYWFfeU7Z8O0JgJF6KmvaeuyA9QvMjC05nOoLclfoqWukVcBdrX RA8w/59lfU0UrQZalv2oB85Cq8qm4Az4IVYP+DZWPi9hCjj612uO5lufKY6m1H43 AmQWBHEzsl6Hx5DZ4D7thMZ5NiSyPuC7M1E/wcFxpo0Mg8uC0JBAvFzXyEmc/5rQ W0Ijabo9ABzlv5ldEu3AI6XFp6t71ct+fXZABiCEptjYZ4yJ5MmkyXlpcTMjdioG L3VswinNLh+3vb4H40aw2WrYy5BR2NqYHxdE8Y+MPdzq3E9QcjV4R0ghwXY9AqLo lucm1gGdQBmB1CD9IMhRRVLdNoAWE1fTmLWBjCxyO2WH4H/u+nNqhXqnIGgX0nh3 IwoLxPWqcGBK668dX7aUEROuE3xZgMO0N8dlf39mAMa2TcyoNYfe+jECEnagPbc9 3YtZ9FDFpxdROiSGuaRddaTcJusChOo7s0YVVnMTnhk7d98h68JYPOW53MaK5Tg8 WgGBi8vwkiQ/jeIU00u46P8LqvpxNAJaFdAlOjoPEP5rxVThOU48nfAZautnunsx 0r7PgGczOt3bXLsGRLVA6BZyR+E0WxEcs+tGwPJacDwjLx6R1+g1k3W2U+8ItLCB Lom2d/JNeD8= =X4VM -----END PGP SIGNATURE-----