Upstream information
Description
An issue was discovered in Xen through 4.14.x. When they require assistance from the device model, x86 HVM guests must be temporarily de-scheduled. The device model will signal Xen when it has completed its operation, via an event channel, so that the relevant vCPU is rescheduled. If the device model were to signal Xen without having actually completed the operation, the de-schedule / re-schedule cycle would repeat. If, in addition, Xen is resignalled very quickly, the re-schedule may occur before the de-schedule was fully complete, triggering a shortcut. This potentially repeating process uses ordinary recursive function calls, and thus could result in a stack overflow. A malicious or buggy stubdomain serving a HVM guest can cause Xen to crash, resulting in a Denial of Service (DoS) to the entire host. Only x86 systems are affected. Arm systems are not affected. Only x86 stubdomains serving HVM guests can exploit the vulnerability.SUSE information
Overall state of this security issue: Running
This issue is currently rated as having moderate severity.
National Vulnerability Database | |
---|---|
Base Score | 4.9 |
Vector | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Access Vector | Local |
Access Complexity | Low |
Authentication | None |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | Complete |
National Vulnerability Database | SUSE | |
---|---|---|
Base Score | 5.5 | 6.5 |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
Access Vector | Local | Local |
Access Complexity | Low | Low |
Privileges Required | Low | Low |
User Interaction | None | None |
Scope | Unchanged | Changed |
Confidentiality Impact | None | None |
Integrity Impact | None | None |
Availability Impact | High | High |
CVSSv3 Version | 3.1 | 3.1 |
- SUSE-IU-2021:1-1, published Wed Feb 3 23:43:05 MST 2021
- SUSE-IU-2021:3-1, published Wed Feb 3 23:45:24 MST 2021
- SUSE-IU-2021:4-1, published Wed Feb 3 23:47:35 MST 2021
- SUSE-IU-2021:5-1, published Wed Feb 10 06:41:43 UTC 2021
- SUSE-IU-2021:7-1, published Wed Feb 10 06:48:24 UTC 2021
- SUSE-SU-2020:14578-1, published Wed Dec 16 13:18:24 MST 2020
- SUSE-SU-2020:3880-1, published Fri Dec 18 13:22:41 MST 2020
- SUSE-SU-2020:3881-1, published Fri Dec 18 13:21:03 MST 2020
- SUSE-SU-2020:3913-1, published Tue Dec 22 10:23:33 MST 2020
- SUSE-SU-2020:3914-1, published Tue Dec 22 10:25:17 MST 2020
- SUSE-SU-2020:3915-1, published Tue Dec 22 10:28:42 MST 2020
- SUSE-SU-2020:3916-1, published Tue Dec 22 10:21:53 MST 2020
- SUSE-SU-2020:3945-1, published Tue Dec 29 10:16:18 MST 2020
- openSUSE-SU-2020:2313-1, published Tue Feb 16 10:57:22 2021
- openSUSE-SU-2020:2331-1, published Tue Feb 16 10:57:22 2021
List of released packages
Product(s) | Fixed package version(s) | References |
---|---|---|
HPE Helion Openstack 8 |
| Patchnames: HPE-Helion-OpenStack-8-2020-3945 |
Image SLES15-EC2-CHOST-HVM-BYOS |
| |
Image SLES15-SP1-CHOST-BYOS-EC2 |
| |
Image SLES15-SP2-CHOST-BYOS-Aliyun Image SLES15-SP2-CHOST-BYOS-Azure Image SLES15-SP2-CHOST-BYOS-GCE |
| |
Image SLES15-SP2-CHOST-BYOS-EC2 |
| |
SUSE Enterprise Storage 5 |
| Patchnames: SUSE-Storage-5-2020-3945 |
SUSE Linux Enterprise High Performance Computing 15-ESPOS SUSE Linux Enterprise High Performance Computing 15-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-2020-3916 |
SUSE Linux Enterprise Module for Basesystem 15 SP1 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP1-2020-3881 |
SUSE Linux Enterprise Module for Basesystem 15 SP2 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP2-2020-3915 |
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1 |
| Patchnames: SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-3881 |
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2 |
| Patchnames: SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2020-3915 |
SUSE Linux Enterprise Module for Server Applications 15 SP1 |
| Patchnames: SUSE-SLE-Module-Server-Applications-15-SP1-2020-3881 |
SUSE Linux Enterprise Module for Server Applications 15 SP2 |
| Patchnames: SUSE-SLE-Module-Server-Applications-15-SP2-2020-3915 |
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT |
| Patchnames: SUSE-SLE-POS-12-SP2-CLIENT-2020-3913 |
SUSE Linux Enterprise Server 11 SP4-LTSS SUSE Linux Enterprise Server for SAP Applications 11 SP4-LTSS |
| Patchnames: slessp4-xen-14578 |
SUSE Linux Enterprise Server 12 SP2-BCL SUSE Linux Enterprise Server for SAP Applications 12 SP2-BCL |
| Patchnames: SUSE-SLE-SERVER-12-SP2-BCL-2020-3913 |
SUSE Linux Enterprise Server 12 SP2-ESPOS SUSE Linux Enterprise Server for SAP Applications 12 SP2-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-ESPOS-2020-3913 |
SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP2-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-2020-3913 |
SUSE Linux Enterprise Server 12 SP3-BCL SUSE Linux Enterprise Server for SAP Applications 12 SP3-BCL |
| Patchnames: SUSE-SLE-SERVER-12-SP3-BCL-2020-3945 |
SUSE Linux Enterprise Server 12 SP3-ESPOS SUSE Linux Enterprise Server for SAP Applications 12 SP3-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP3-ESPOS-2020-3945 |
SUSE Linux Enterprise Server 12 SP3-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP3-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP3-2020-3945 |
SUSE Linux Enterprise Server 12 SP4-ESPOS SUSE Linux Enterprise Server for SAP Applications 12 SP4-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP4-ESPOS-2020-3914 |
SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP4-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP4-LTSS-2020-3914 |
SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server for SAP Applications 12 SP5 |
| Patchnames: SUSE-SLE-SERVER-12-SP5-2020-3880 |
SUSE Linux Enterprise Server 15-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-2020-3916 |
SUSE Linux Enterprise Server for SAP Applications 12 SP2 |
| Patchnames: SUSE-SLE-SAP-12-SP2-2020-3913 |
SUSE Linux Enterprise Server for SAP Applications 12 SP3 |
| Patchnames: SUSE-SLE-SAP-12-SP3-2020-3945 |
SUSE Linux Enterprise Server for SAP Applications 12 SP4 |
| Patchnames: SUSE-SLE-SAP-12-SP4-2020-3914 |
SUSE Linux Enterprise Server for SAP Applications 15 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-2020-3916 |
SUSE Linux Enterprise Software Development Kit 12 SP5 |
| Patchnames: SUSE-SLE-SDK-12-SP5-2020-3880 |
SUSE OpenStack Cloud 7 |
| Patchnames: SUSE-OpenStack-Cloud-7-2020-3913 |
SUSE OpenStack Cloud 8 |
| Patchnames: SUSE-OpenStack-Cloud-8-2020-3945 |
SUSE OpenStack Cloud 9 |
| Patchnames: SUSE-OpenStack-Cloud-9-2020-3914 |
SUSE OpenStack Cloud Crowbar 8 |
| Patchnames: SUSE-OpenStack-Cloud-Crowbar-8-2020-3945 |
SUSE OpenStack Cloud Crowbar 9 |
| Patchnames: SUSE-OpenStack-Cloud-Crowbar-9-2020-3914 |
openSUSE Leap 15.1 |
| Patchnames: openSUSE-2020-2313 |
openSUSE Leap 15.2 |
| Patchnames: openSUSE-2020-2331 |
First public cloud image revisions this CVE is fixed in:
- alibaba/sles-15-sp2-chost-byos-v20210202
- alibaba/sles-15-sp2-chost-byos-v20210304
- amazon/suse-manager-4-0-proxy-byos-v20210215-hvm-ssd-x86_64
- amazon/suse-manager-4-0-server-byos-v20210215-hvm-ssd-x86_64
- amazon/suse-manager-4-1-proxy-byos-v20210212-hvm-ssd-x86_64
- amazon/suse-manager-4-1-server-byos-v20210212-hvm-ssd-x86_64
- amazon/suse-sles-12-sp3-byos-v20210217-hvm-ssd-x86_64
- amazon/suse-sles-12-sp4-byos-v20210217-hvm-ssd-x86_64
- amazon/suse-sles-12-sp5-byos-v20210215-hvm-ssd-x86_64
- amazon/suse-sles-12-sp5-v20210212-hvm-ssd-x86_64
- amazon/suse-sles-12-sp5-v20210216-ecs-hvm-ssd-x86_64
- amazon/suse-sles-15-byos-v20210216-hvm-ssd-arm64
- amazon/suse-sles-15-byos-v20210216-hvm-ssd-x86_64
- amazon/suse-sles-15-sp1-byos-v20210220-hvm-ssd-x86_64
- amazon/suse-sles-15-sp1-byos-v20210221-hvm-ssd-arm64
- amazon/suse-sles-15-sp1-chost-byos-v20210202-hvm-ssd-x86_64
- amazon/suse-sles-15-sp1-sapcal-v20210216-hvm-ssd-x86_64
- amazon/suse-sles-15-sp2-byos-v20210212-hvm-ssd-arm64
- amazon/suse-sles-15-sp2-byos-v20210212-hvm-ssd-x86_64
- amazon/suse-sles-15-sp2-chost-byos-v20210202-hvm-ssd-x86_64
- amazon/suse-sles-15-sp2-v20210212-hvm-ssd-arm64
- amazon/suse-sles-15-sp2-v20210212-hvm-ssd-x86_64
- amazon/suse-sles-15-sp2-v20210216-ecs-hvm-ssd-x86_64
- amazon/suse-sles-15-sp2-v20210303-ecs-hvm-ssd-x86_64
- amazon/suse-sles-hpc-15-sp1-byos-v20210216-hvm-ssd-x86_64
- amazon/suse-sles-hpc-15-sp2-byos-v20210212-hvm-ssd-x86_64
- amazon/suse-sles-sap-12-sp3-byos-v20210217-hvm-ssd-x86_64
- amazon/suse-sles-sap-12-sp4-byos-v20210217-hvm-ssd-x86_64
- amazon/suse-sles-sap-12-sp5-byos-v20210215-hvm-ssd-x86_64
- amazon/suse-sles-sap-15-byos-v20210216-hvm-ssd-x86_64
- amazon/suse-sles-sap-15-sp1-byos-v20210221-hvm-ssd-x86_64
- amazon/suse-sles-sap-15-sp2-byos-v20210212-hvm-ssd-x86_64
- google/sles-12-sp3-sap-byos-v20210210
- google/sles-12-sp3-sap-v20210210
- google/sles-15-sp2-byos-v20210204
- google/sles-15-sp2-chost-byos-v20210202
- google/sles-15-sp2-sap-byos-v20210204
- google/sles-15-sp2-sap-v20210204
- google/sles-15-sp2-v20210204
- google/suse-manager-4-1-proxy-byos-v20210209
- google/suse-manager-4-1-server-byos-v20210209
- oracle/sles-15-sp2-byos-v20210303
- oracle/sles-15-sp2-sap-byos-v20210303
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 | Affected |
SUSE Enterprise Storage 5 | xen | Unsupported |
SUSE Linux Enterprise High Performance Computing 12 SP5 | xen | Released |
SUSE Linux Enterprise High Performance Computing 15 LTSS | xen | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | Released |
SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | Released |
SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | Released |
SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | Released |
SUSE Linux Enterprise Point of Service 11 SP3 | xen | Affected |
SUSE Linux Enterprise Point of Service Image Server 12 | xen | Unsupported |
SUSE Linux Enterprise Server 11 SP4 LTSS | xen | Affected |
SUSE Linux Enterprise Server 12 SP2 BCL | xen | Affected |
SUSE Linux Enterprise Server 12 SP2 ESPOS | xen | Unsupported |
SUSE Linux Enterprise Server 12 SP2 LTSS | xen | Affected |
SUSE Linux Enterprise Server 12 SP3 BCL | xen | Affected |
SUSE Linux Enterprise Server 12 SP3 ESPOS | xen | Affected |
SUSE Linux Enterprise Server 12 SP3 LTSS | xen | Affected |
SUSE Linux Enterprise Server 12 SP4 ESPOS | xen | Affected |
SUSE Linux Enterprise Server 12 SP4 LTSS | xen | Affected |
SUSE Linux Enterprise Server 12 SP5 | xen | Released |
SUSE Linux Enterprise Server 15 LTSS | xen | Affected |
SUSE Linux Enterprise Server ESPOS 15 | xen | Affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | Unsupported |
SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | Affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | Affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | Released |
SUSE Linux Enterprise Server for SAP Applications 15 | xen | Affected |
SUSE OpenStack Cloud 7 | xen | Affected |
SUSE OpenStack Cloud 8 | xen | Affected |
SUSE OpenStack Cloud 9 | xen | Affected |
SUSE OpenStack Cloud Crowbar 8 | xen | Affected |
SUSE OpenStack Cloud Crowbar 9 | xen | Affected |