Vulmon
Description of Problem
A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of a guest VM to compromise the host.
These vulnerabilities affect all currently supported versions of Citrix XenServer up to and including Citrix XenServer 7.2.
The following vulnerabilities have been addressed:
- CVE-2017-14316: (High) Missing NUMA node parameter verification
- CVE-2017-14318: (Medium) Missing check for grant table
- CVE-2017-14319: (High) insufficient grant unmapping checks for x86 PV guests
What Customers Should Do
Hotfixes have been released to address these issues. Citrix strongly recommends that affected customers install these hotfixes as soon as possible. The hotfixes can be downloaded from the following locations:
Citrix XenServer 7.2: CTX227236 – https://support.citrix.com/article/CTX227236
Citrix XenServer 7.1 LTSR CU1: CTX227235 – https://support.citrix.com/article/CTX227235
Citrix XenServer 7.1 LTSR: CTX227234 – https://support.citrix.com/article/CTX227234
Citrix XenServer 7.0: CTX227233 – https://support.citrix.com/article/CTX227233
Citrix XenServer 6.5 SP1: CTX227232 – https://support.citrix.com/article/CTX227232
Citrix XenServer 6.2 SP1: CTX227231 – https://support.citrix.com/article/CTX227231
Citrix XenServer 6.0.2 Common Criteria: CTX227237 – https://support.citrix.com/article/CTX227237
Customers who are using the Live Patching feature of Citrix XenServer may apply the relevant hotfix without requiring a reboot.
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 https://www.citrix.com/support/open-a-support-case.html.
Reporting Security Vulnerabilities
Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For guidance on how to report security-related issues to Citrix, please see the following document: CTX081743 – Reporting Security Issues to Citrix
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