Upstream information

CVE-2021-28710 at MITRE

Description

certain VT-d IOMMUs may not work in shared page table mode For efficiency reasons, address translation control structures (page tables) may (and, on suitable hardware, by default will) be shared between CPUs, for second-level translation (EPT), and IOMMUs. These page tables are presently set up to always be 4 levels deep. However, an IOMMU may require the use of just 3 page table levels. In such a configuration the lop level table needs to be stripped before inserting the root table's address into the hardware pagetable base register. When sharing page tables, Xen erroneously skipped this stripping. Consequently, the guest is able to write to leaf page table entries.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 6.9
Vector AV:L/AC:M/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 8.8 7.8
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector Local Local
Access Complexity Low Low
Privileges Required Low Low
User Interaction None None
Scope Changed Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1192888 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
HPE Helion OpenStack 8 xen Not affected
SUSE CaaS Platform 4.0 xen Not affected
SUSE Enterprise Storage 6 xen Not affected
SUSE Linux Enterprise Desktop 15 SP2 xen Not affected
SUSE Linux Enterprise Desktop 15 SP3 xen Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5 xen Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2 xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 xen Not affected
SUSE Linux Enterprise Micro 5.0 xen Not affected
SUSE Linux Enterprise Micro 5.1 xen Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 xen Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 xen Not affected
SUSE Linux Enterprise Module for Server Applications 15 SP2 xen Not affected
SUSE Linux Enterprise Module for Server Applications 15 SP3 xen Not affected
SUSE Linux Enterprise Point of Service 11 SP3 xen Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP2 BCL xen Not affected
SUSE Linux Enterprise Server 12 SP3 BCL xen Not affected
SUSE Linux Enterprise Server 12 SP3 ESPOS xen Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP4 ESPOS xen Not affected
SUSE Linux Enterprise Server 12 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP5 xen Not affected
SUSE Linux Enterprise Server 15 ESPOS xen Not affected
SUSE Linux Enterprise Server 15 LTSS xen Not affected
SUSE Linux Enterprise Server 15 SP1 LTSS xen Not affected
SUSE Linux Enterprise Server 15 SP2 xen Not affected
SUSE Linux Enterprise Server 15 SP3 xen Not affected
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 xen Not affected
SUSE Linux Enterprise Storage 7 xen Not affected
SUSE Linux Enterprise Storage 7.1 xen Not affected
SUSE Manager Proxy 4.1 xen Not affected
SUSE Manager Proxy 4.2 xen Not affected
SUSE Manager Retail Branch Server 4.1 xen Not affected
SUSE Manager Retail Branch Server 4.2 xen Not affected
SUSE Manager Server 4.1 xen Not affected
SUSE Manager Server 4.2 xen Not affected
SUSE OpenStack Cloud 8 xen Not affected
SUSE OpenStack Cloud 9 xen Not affected
SUSE OpenStack Cloud Crowbar 8 xen Not affected
SUSE OpenStack Cloud Crowbar 9 xen Not affected