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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1185 Vulnerability in Citrix XenApp could result in arbitrary code execution 13 December 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix XenApp Publisher: Citrix Operating System: Windows Server 2008 Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-5161 Original Bulletin: http://support.citrix.com/article/CTX135066 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability in Citrix XenApp could result in arbitrary code execution Document ID: CTX135066 Created On: Dec 11, 2012 Updated On: Dec 11, 2012 Severity: High Description of Problem A vulnerability has been identified in the XML Service interface of XenApp that could potentially be used by a remote, unauthenticated attacker to execute arbitrary code in the context of a service account on a XenApp server. The vulnerability could potentially be exploited by sending a specially crafted packet to the vulnerable component. This vulnerability affects Citrix XenApp versions 6.5 both with, and without, Feature Pack 1. This vulnerability has been assigned the following CVE: CVE-2012-5161 Mitigating Factors In order to exploit this issue, the attacker would need to be able to access the XML Service interface. In a normal deployment, the XML Service would not be directly exposed to the Internet. What Customers Should Do Hotfixes have been released to address this issue. Citrix strongly recommends that all customers install these hotfixes, which can be downloaded from the following locations: Citrix XenApp 6.5 for Windows Server 2008 R2 with Feature Pack 1: CTX135025 - Hotfix XA650R01W2K8R2X64033 - For Citrix XenApp 6.5 for Windows Server 2008 R2 - - English Customers that are not able to upgrade to XenApp 6.5 with Feature Pack 1 may use the hotfix for the release version of XenApp 6.5 which is available at the following location: Citrix XenApp 6.5 for Windows Server 2008 R2: CTX135499 - Hotfix XA650W2K8R2X64036 - For Citrix XenApp 6.5 for Windows Server 2008 R2 - English 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: XenApp 6.5 for Windows Server 2008 R2 - --------------------------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). 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