4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
12.6%
A security issue has been identified that may allow privileged code running in a guest VM to compromise the host. This issue is limited to only those guest VMs where the host administrator has explicitly assigned a PCI passthrough device to the guest VM.
The issue has the following identifier:
CVE ID | Description | Vulnerability Type | Pre-conditions |
---|---|---|---|
CVE-2020-29040 | Bounding error updating physmap | CWE-121 | A PCI passthrough device must be assigned |
This issue affects all currently supported versions of Citrix Hypervisor up to and including Citrix Hypervisor 8.2 LTSR. |
Customers who are not using the PCI passthrough feature of Citrix Hypervisor are not at risk from this issue
Citrix has released hotfixes to address this issue. Citrix recommends that affected customers install these hotfixes as their patching schedule allows. The hotfixes can be downloaded from the following locations:
Citrix Hypervisor 8.2 LTSR: CTX286459 – <https://support.citrix.com/article/CTX286459>
Citrix Hypervisor 8.1: CTX286458 – <https://support.citrix.com/article/CTX286458>
Citrix XenServer 7.1 LTSR CU2: CTX286457 – <https://support.citrix.com/article/CTX286457>
Citrix XenServer 7.0: CTX286456 – <https://support.citrix.com/article/CTX286456>
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/>_.
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>_.
Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For details on our vulnerability response process and guidance on how to report security-related issues to Citrix, please see the following webpage: – <https://www.citrix.com/about/trust-center/vulnerability-process.html>
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. Citrix reserves the right to change or update this document at any time.
Date | Change |
---|---|
2020-11-24 | Initial Publication |
2021-01-20 | CVE ID Added |
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
12.6%