XenServer and Citrix Hypervisor Security Update for CVE-2023-46842, CVE-2024-2201 and CVE-2024-31142

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:

• CVE-2024-2201
• 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:

• 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&gt;

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&gt;

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&gt;.

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&gt;.

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&gt;.

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