CVE-2021-27379

Upstream information

CVE-2021-27379 at MITRE

Description

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.

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Upstream Security Advisories:

• https://xenbits.xen.org/xsa/advisory-366.html

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	5.9
Vector	AV:L/AC:M/Au:N/C:P/I:P/A:C
Access Vector	Local
Access Complexity	Medium
Authentication	None
Confidentiality Impact	Partial
Integrity Impact	Partial
Availability Impact	Complete

CVSS v3 Scores

	National Vulnerability Database	SUSE
Base Score	7.8	7.9
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
Attack Vector	Local	Local
Attack Complexity	Low	Low
Privileges Required	Low	Low
User Interaction	None	None
Scope	Unchanged	Changed
Confidentiality Impact	High	Low
Integrity Impact	High	Low
Availability Impact	High	High
CVSSv3 Version	3.1	3.1

Note from the SUSE Security Team on the xen package

This issue likely only affects the XEN hypervisor itself, unless otherwise stated. The userland utilities in -tools and libraries in -libs are shipped together with the xen hypervisor as they are built from one source and do not contain hypervisor specific fixes.

SUSE Bugzilla entry: 1182431 [RESOLVED / FIXED]

SUSE Security Advisories:

• SUSE-IU-2022:237-1, published Thu Feb 3 07:28:34 UTC 2022
• SUSE-SU-2021:1250-1, published Mon Apr 19 10:15:24 UTC 2021
• SUSE-SU-2021:1251-1, published Mon Apr 19 10:17:44 UTC 2021
• SUSE-SU-2021:1252-1, published Mon Apr 19 10:16:34 UTC 2021
• SUSE-SU-2021:1268-1, published Tue Apr 20 13:16:17 UTC 2021

List of released packages

Product(s)	Fixed package version(s)	References
HPE Helion OpenStack 8	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: HPE-Helion-OpenStack-8-2021-1252
Image SLES12-SP4-EC2-HVM-BYOS Image SLES12-SP4-SAP-EC2-HVM Image SLES12-SP4-SAP-EC2-HVM-BYOS	xen-libs >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1
Image SLES15-EC2-CHOST-HVM-BYOS Image SLES15-EC2-HVM-BYOS Image SLES15-SAP-EC2-HVM Image SLES15-SAP-EC2-HVM-BYOS	xen-libs >= 4.10.4_24-3.56.1 xen-tools-domU >= 4.10.4_24-3.56.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS SUSE Linux Enterprise High Performance Computing 15-LTSS	xen >= 4.10.4_24-3.56.1 xen-devel >= 4.10.4_24-3.56.1 xen-libs >= 4.10.4_24-3.56.1 xen-tools >= 4.10.4_24-3.56.1 xen-tools-domU >= 4.10.4_24-3.56.1	Patchnames: SUSE-SLE-Product-HPC-15-2021-1250
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-SLE-POS-12-SP2-CLIENT-2021-1268
SUSE Linux Enterprise Server 12 SP2-BCL	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-SLE-SERVER-12-SP2-BCL-2021-1268
SUSE Linux Enterprise Server 12 SP2-ESPOS	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-SLE-SERVER-12-SP2-ESPOS-2021-1268
SUSE Linux Enterprise Server 12 SP2-LTSS	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-SLE-SERVER-12-SP2-2021-1268
SUSE Linux Enterprise Server 12 SP3-BCL	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-SLE-SERVER-12-SP3-BCL-2021-1252
SUSE Linux Enterprise Server 12 SP3-ESPOS	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-SLE-SERVER-12-SP3-ESPOS-2021-1252
SUSE Linux Enterprise Server 12 SP3-LTSS	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-SLE-SERVER-12-SP3-2021-1252
SUSE Linux Enterprise Server 12 SP4-ESPOS	xen >= 4.11.4_16-2.51.1 xen-doc-html >= 4.11.4_16-2.51.1 xen-libs >= 4.11.4_16-2.51.1 xen-libs-32bit >= 4.11.4_16-2.51.1 xen-tools >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1	Patchnames: SUSE-SLE-SERVER-12-SP4-ESPOS-2021-1251
SUSE Linux Enterprise Server 12 SP4-LTSS	xen >= 4.11.4_16-2.51.1 xen-doc-html >= 4.11.4_16-2.51.1 xen-libs >= 4.11.4_16-2.51.1 xen-libs-32bit >= 4.11.4_16-2.51.1 xen-tools >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1	Patchnames: SUSE-SLE-SERVER-12-SP4-LTSS-2021-1251
SUSE Linux Enterprise Server 15-LTSS	xen >= 4.10.4_24-3.56.1 xen-devel >= 4.10.4_24-3.56.1 xen-libs >= 4.10.4_24-3.56.1 xen-tools >= 4.10.4_24-3.56.1 xen-tools-domU >= 4.10.4_24-3.56.1	Patchnames: SUSE-SLE-Product-SLES-15-2021-1250
SUSE Linux Enterprise Server for SAP Applications 12 SP2	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-SLE-SAP-12-SP2-2021-1268
SUSE Linux Enterprise Server for SAP Applications 12 SP3	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-SLE-SAP-12-SP3-2021-1252
SUSE Linux Enterprise Server for SAP Applications 12 SP4	xen >= 4.11.4_16-2.51.1 xen-doc-html >= 4.11.4_16-2.51.1 xen-libs >= 4.11.4_16-2.51.1 xen-libs-32bit >= 4.11.4_16-2.51.1 xen-tools >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1	Patchnames: SUSE-SLE-SAP-12-SP4-2021-1251
SUSE Linux Enterprise Server for SAP Applications 15	xen >= 4.10.4_24-3.56.1 xen-devel >= 4.10.4_24-3.56.1 xen-libs >= 4.10.4_24-3.56.1 xen-tools >= 4.10.4_24-3.56.1 xen-tools-domU >= 4.10.4_24-3.56.1	Patchnames: SUSE-SLE-Product-SLES_SAP-15-2021-1250
SUSE OpenStack Cloud 7	xen >= 4.7.6_14-43.76.1 xen-doc-html >= 4.7.6_14-43.76.1 xen-libs >= 4.7.6_14-43.76.1 xen-libs-32bit >= 4.7.6_14-43.76.1 xen-tools >= 4.7.6_14-43.76.1 xen-tools-domU >= 4.7.6_14-43.76.1	Patchnames: SUSE-OpenStack-Cloud-7-2021-1268
SUSE OpenStack Cloud 8	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-OpenStack-Cloud-8-2021-1252
SUSE OpenStack Cloud 9	xen >= 4.11.4_16-2.51.1 xen-doc-html >= 4.11.4_16-2.51.1 xen-libs >= 4.11.4_16-2.51.1 xen-libs-32bit >= 4.11.4_16-2.51.1 xen-tools >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1	Patchnames: SUSE-OpenStack-Cloud-9-2021-1251
SUSE OpenStack Cloud Crowbar 8	xen >= 4.9.4_16-3.83.1 xen-doc-html >= 4.9.4_16-3.83.1 xen-libs >= 4.9.4_16-3.83.1 xen-libs-32bit >= 4.9.4_16-3.83.1 xen-tools >= 4.9.4_16-3.83.1 xen-tools-domU >= 4.9.4_16-3.83.1	Patchnames: SUSE-OpenStack-Cloud-Crowbar-8-2021-1252
SUSE OpenStack Cloud Crowbar 9	xen >= 4.11.4_16-2.51.1 xen-doc-html >= 4.11.4_16-2.51.1 xen-libs >= 4.11.4_16-2.51.1 xen-libs-32bit >= 4.11.4_16-2.51.1 xen-tools >= 4.11.4_16-2.51.1 xen-tools-domU >= 4.11.4_16-2.51.1	Patchnames: SUSE-OpenStack-Cloud-Crowbar-9-2021-1251

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First public cloud image revisions this CVE is fixed in:

• amazon/suse-sles-12-sp3-byos-v20220128-hvm-ssd-x86_64
• amazon/suse-sles-12-sp4-byos-v20220128-hvm-ssd-x86_64
• amazon/suse-sles-15-byos-v20220128-hvm-ssd-x86_64
• amazon/suse-sles-15-chost-byos-v20220201-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp3-byos-v20220128-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp3-v20220304-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp4-byos-v20220201-hvm-ssd-x86_64
• amazon/suse-sles-sap-12-sp4-v20220304-hvm-ssd-x86_64
• amazon/suse-sles-sap-15-byos-v20220131-hvm-ssd-x86_64
• amazon/suse-sles-sap-15-v20220304-hvm-ssd-x86_64
• google/sles-12-sp3-sap-byos-v20220126
• google/sles-12-sp3-sap-v20220126
• microsoft/suse-sles-sap-12-sp3-byos-v20220128
• microsoft/suse-sles-sap-12-sp3-v20220127

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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. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s)	Source package	State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Micro 5.1	xen	Not affected
SUSE Linux Enterprise Micro 5.2	xen	Not affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 12 SP5	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS	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 Server 12 SP5	xen	Not affected
SUSE Linux Enterprise Server 12 SP5-LTSS	xen	Not affected
SUSE Linux Enterprise Server 15 SP2	xen	Not affected
SUSE Linux Enterprise Server 15 SP2-LTSS	xen	Not affected
SUSE Linux Enterprise Server 15 SP3	xen	Not affected
SUSE Linux Enterprise Server 15 SP3-LTSS	xen	Not affected
SUSE Linux Enterprise Server 15-ESPOS	xen	Released
SUSE Linux Enterprise Server Business Critical Linux 15 SP1	xen	Not affected
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5	xen	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5	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
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8	xen	Released
SUSE CaaS Platform 3.0	xen	Affected
SUSE CaaS Platform 4.0	xen	Not affected
SUSE Enterprise Storage 6	xen	Not affected
SUSE Enterprise Storage 7	xen	Not affected
SUSE Enterprise Storage 7.1	xen	Not affected
SUSE Linux Enterprise Desktop 11 SP3	xen	Not affected
SUSE Linux Enterprise Desktop 11 SP4	xen	Not affected
SUSE Linux Enterprise Desktop 12 SP2	xen	Affected
SUSE Linux Enterprise Desktop 12 SP3	xen	Affected
SUSE Linux Enterprise Desktop 12 SP4	xen	Affected
SUSE Linux Enterprise Desktop 15	xen	Affected
SUSE Linux Enterprise Desktop 15 SP1	xen	Unsupported
SUSE Linux Enterprise Desktop 15 SP2	xen	Not affected
SUSE Linux Enterprise Desktop 15 SP3	xen	Not affected
SUSE Linux Enterprise High Performance Computing 15	xen	Affected
SUSE Linux Enterprise High Performance Computing 15 SP1	xen	Unsupported
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-ESPOS	xen	Released
SUSE Linux Enterprise High Performance Computing 15-LTSS	xen	Released
SUSE Linux Enterprise Micro 5.0	xen	Not affected
SUSE Linux Enterprise Module for Basesystem 15	xen	Affected
SUSE Linux Enterprise Module for Basesystem 15 SP1	xen	Unsupported
SUSE Linux Enterprise Module for Server Applications 15	xen	Affected
SUSE Linux Enterprise Module for Server Applications 15 SP1	xen	Unsupported
SUSE Linux Enterprise Point of Sale 11 SP3	xen	Not affected
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT	xen	Released
SUSE Linux Enterprise Point of Service 11 SP3	xen	Not affected
SUSE Linux Enterprise Point of Service Image Server 12 SP2	xen	Released
SUSE Linux Enterprise Real Time 15 SP2	xen	Not affected
SUSE Linux Enterprise Real Time 15 SP3	xen	Not affected
SUSE Linux Enterprise Server 11 SP3	xen	Not affected
SUSE Linux Enterprise Server 11 SP3-LTSS	xen	Not affected
SUSE Linux Enterprise Server 11 SP4	xen	Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS	xen	Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS	xen	Not affected
SUSE Linux Enterprise Server 12 SP2	xen	Affected
SUSE Linux Enterprise Server 12 SP2-BCL	xen	Released
SUSE Linux Enterprise Server 12 SP2-ESPOS	xen	Released
SUSE Linux Enterprise Server 12 SP2-LTSS	xen	Released
SUSE Linux Enterprise Server 12 SP3	xen	Affected
SUSE Linux Enterprise Server 12 SP3-BCL	xen	Released
SUSE Linux Enterprise Server 12 SP3-ESPOS	xen	Released
SUSE Linux Enterprise Server 12 SP3-LTSS	xen	Released
SUSE Linux Enterprise Server 12 SP4	xen	Affected
SUSE Linux Enterprise Server 12 SP4-ESPOS	xen	Released
SUSE Linux Enterprise Server 12 SP4-LTSS	xen	Released
SUSE Linux Enterprise Server 15	xen	Affected
SUSE Linux Enterprise Server 15 SP1	xen	Unsupported
SUSE Linux Enterprise Server 15 SP1-BCL	xen	Not affected
SUSE Linux Enterprise Server 15 SP1-LTSS	xen	Not affected
SUSE Linux Enterprise Server 15 SP2-BCL	xen	Not affected
SUSE Linux Enterprise Server 15 SP3-BCL	xen	Not affected
SUSE Linux Enterprise Server 15-LTSS	xen	Released
SUSE Linux Enterprise Server for SAP Applications 11 SP3	xen	Not affected
SUSE Linux Enterprise Server for SAP Applications 11 SP4	xen	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2	xen	Released
SUSE Linux Enterprise Server for SAP Applications 12 SP3	xen	Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4	xen	Released
SUSE Linux Enterprise Server for SAP Applications 15	xen	Released
SUSE Linux Enterprise Server for SAP Applications 15 SP1	xen	Not affected
SUSE Linux Enterprise Software Development Kit 11 SP3	xen	Not affected
SUSE Linux Enterprise Software Development Kit 11 SP4	xen	Not affected
SUSE Linux Enterprise Software Development Kit 12 SP2	xen	Affected
SUSE Linux Enterprise Software Development Kit 12 SP3	xen	Affected
SUSE Linux Enterprise Software Development Kit 12 SP4	xen	Affected
SUSE Linux Enterprise Software Development Kit 12 SP5	xen	Not affected
SUSE Manager Proxy 4.0	xen	Not affected
SUSE Manager Proxy 4.1	xen	Not affected
SUSE Manager Proxy 4.2	xen	Not affected
SUSE Manager Retail Branch Server 4.0	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 4.0	xen	Not affected
SUSE Manager Server 4.1	xen	Not affected
SUSE Manager Server 4.2	xen	Not affected
SUSE OpenStack Cloud 7	xen	Released
SUSE OpenStack Cloud 8	xen	Released
SUSE OpenStack Cloud 9	xen	Released
SUSE OpenStack Cloud Crowbar 8	xen	Released
SUSE OpenStack Cloud Crowbar 9	xen	Released
openSUSE Leap 15.3	xen	Not affected
openSUSE Leap Micro 5.2	xen	Not affected

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SUSE Timeline for this CVE

CVE page created: Thu Feb 18 13:45:19 2021
CVE page last modified: Mon Nov 18 14:01:37 2024