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=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2024.2272 XenServer and Citrix Hypervisor Security Update for CVE-2023-46842, CVE-2024-2201 and CVE-2024-31142 12 April 2024 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix Hypervisor XenServer Publisher: Citrix Systems Operating System: Citrix XenServer Resolution: Patch/Upgrade CVE Names: CVE-2024-31142 CVE-2023-46842 CVE-2024-2201 Original Bulletin: https://support.citrix.com/article/CTX633151/xenserver-and-citrix-hypervisor-security-update-for-cve202346842-cve20242201-and-cve202431142 Comment: CVSS (Max): 6.5 CVE-2023-46842 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H) CVSS Source: [SUSE], Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- XenServer and Citrix Hypervisor Security Update for CVE-2023-46842, CVE-2024-2201 and CVE-2024-31142 Reference: CTX633151 Category : Severity: High Created : 11 April 2024 Modified : 11 April 2024 Applicable Products o Citrix Hypervisor o XenServer Description of Problem Two issues have been identified that affect XenServer and Citrix Hypervisor; each issue may allow malicious unprivileged code in a guest VM to infer the contents of memory belonging to its own or other VMs on the same host. These issues have the following identifiers: o CVE-2024-2201 o CVE-2024-31142 CVE-2024-2201 only affects deployments that use Intel CPUs; CVE-2024-31142 only affects deployments that use AMD CPUs. A further issue has been discovered that may allow malicious privileged code running in a guest VM to cause the host to crash. This issue has the following identifier: o CVE-2023-46842 CVE-2023-46842 affects all deployments. What Customers Should Do For customers using XenServer 8, we have pushed an update to both the Early Access and Normal update channels. We recommend that customers update to the latest version from their chosen channel following the instructions at https:// docs.xenserver.com/en-us/xenserver/8/update For customers using Citrix Hypervisor 8.2 CU1 LTSR, we have released a hotfix to address this issue. We recommend that customers install this hotfix and follow the instructions in the linked article as their update schedule permits. The hotfix can be downloaded from the following location: CTX588044 - https://support.citrix.com/article/CTX588044 What We Are Doing We are notifying customers and channel partners about this potential security issue through the publication of this security bulletin on the Citrix Knowledge Center at https://support.citrix.com/securitybulletins . 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 https://www.citrix.com/support . Subscribe to Receive Alerts We strongly recommend that all customers subscribe to receive alerts when a security bulletin is created or modified at https://support.citrix.com/user/ alerts . Reporting Security Vulnerabilities to Us We welcome input regarding the security of our products and consider any and all potential vulnerabilities seriously. For details on our vulnerability response process and guidance on how to report security-related issues to us, please see the following webpage: https://www.citrix.com/about/trust-center/ vulnerability-process.html . Disclaimer This document is provided on an "as is" basis and does not imply any kind of guarantee or warranty, including the warranties of merchantability or fitness for a particular use. Your use of the information on the document is at your own risk. Cloud Software Group reserves the right to change or update this document at any time. Customers are therefore recommended to always view the latest version of this document directly from the Citrix Knowledge Center. Changelog 2024-04-09 Initial Publication - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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. ===========================================================================