Upstream information

CVE-2020-29483 at MITRE

Description

An issue was discovered in Xen through 4.14.x. Xenstored and guests communicate via a shared memory page using a specific protocol. When a guest violates this protocol, xenstored will drop the connection to that guest. Unfortunately, this is done by just removing the guest from xenstored's internal management, resulting in the same actions as if the guest had been destroyed, including sending an @releaseDomain event. @releaseDomain events do not say that the guest has been removed. All watchers of this event must look at the states of all guests to find the guest that has been removed. When an @releaseDomain is generated due to a domain xenstored protocol violation, because the guest is still running, the watchers will not react. Later, when the guest is actually destroyed, xenstored will no longer have it stored in its internal data base, so no further @releaseDomain event will be sent. This can lead to a zombie domain; memory mappings of that guest's memory will not be removed, due to the missing event. This zombie domain will be cleaned up only after another domain is destroyed, as that will trigger another @releaseDomain event. If the device model of the guest that violated the Xenstore protocol is running in a stub-domain, a use-after-free case could happen in xenstored, after having removed the guest from its internal data base, possibly resulting in a crash of xenstored. A malicious guest can block resources of the host for a period after its own death. Guests with a stub domain device model can eventually crash xenstored, resulting in a more serious denial of service (the prevention of any further domain management operations). Only the C variant of Xenstore is affected; the Ocaml variant is not affected. Only HVM guests with a stubdom device model can cause a serious DoS.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  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
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 6.5 6.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 Changed Changed
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entries: 1178658 [RESOLVED / FIXED], 1179502 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
HPE Helion Openstack 8
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
HPE-Helion-OpenStack-8-2020-3945
Image SLES15-EC2-CHOST-HVM-BYOS
  • xen-libs >= 4.10.4_24-3.53.1
  • xen-tools-domU >= 4.10.4_24-3.53.1
Image SLES15-SP1-CHOST-BYOS-EC2
  • xen-libs >= 4.12.4_06-3.40.1
  • xen-tools-domU >= 4.12.4_06-3.40.1
Image SLES15-SP2-CHOST-BYOS-Aliyun
Image SLES15-SP2-CHOST-BYOS-Azure
Image SLES15-SP2-CHOST-BYOS-GCE
  • xen-libs >= 4.13.2_06-3.22.1
Image SLES15-SP2-CHOST-BYOS-EC2
  • xen-libs >= 4.13.2_06-3.22.1
  • xen-tools-domU >= 4.13.2_06-3.22.1
SUSE Enterprise Storage 5
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-Storage-5-2020-3945
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • xen >= 4.10.4_24-3.53.1
  • xen-devel >= 4.10.4_24-3.53.1
  • xen-libs >= 4.10.4_24-3.53.1
  • xen-tools >= 4.10.4_24-3.53.1
  • xen-tools-domU >= 4.10.4_24-3.53.1
Patchnames:
SUSE-SLE-Product-HPC-15-2020-3916
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • xen-libs >= 4.12.4_06-3.40.1
  • xen-tools-domU >= 4.12.4_06-3.40.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2020-3881
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • xen-libs >= 4.13.2_06-3.22.1
  • xen-tools-domU >= 4.13.2_06-3.22.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2020-3915
SUSE Linux Enterprise Module for Basesystem 15 SP3
  • xen-libs >= 4.14.1_16-1.6
  • xen-tools-domU >= 4.14.1_16-1.6
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
  • xen >= 4.12.4_06-3.40.1
  • xen-devel >= 4.12.4_06-3.40.1
  • xen-doc-html >= 4.12.4_06-3.40.1
  • xen-libs >= 4.12.4_06-3.40.1
  • xen-libs-32bit >= 4.12.4_06-3.40.1
  • xen-tools >= 4.12.4_06-3.40.1
  • xen-tools-domU >= 4.12.4_06-3.40.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-3881
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2
  • xen >= 4.13.2_06-3.22.1
  • xen-devel >= 4.13.2_06-3.22.1
  • xen-doc-html >= 4.13.2_06-3.22.1
  • xen-libs >= 4.13.2_06-3.22.1
  • xen-libs-32bit >= 4.13.2_06-3.22.1
  • xen-tools >= 4.13.2_06-3.22.1
  • xen-tools-domU >= 4.13.2_06-3.22.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2020-3915
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • xen >= 4.12.4_06-3.40.1
  • xen-devel >= 4.12.4_06-3.40.1
  • xen-tools >= 4.12.4_06-3.40.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP1-2020-3881
SUSE Linux Enterprise Module for Server Applications 15 SP2
  • xen >= 4.13.2_06-3.22.1
  • xen-devel >= 4.13.2_06-3.22.1
  • xen-tools >= 4.13.2_06-3.22.1
  • xen-tools-xendomains-wait-disk >= 4.13.2_06-3.22.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP2-2020-3915
SUSE Linux Enterprise Module for Server Applications 15 SP3
  • xen >= 4.14.1_16-1.6
  • xen-devel >= 4.14.1_16-1.6
  • xen-tools >= 4.14.1_16-1.6
  • xen-tools-xendomains-wait-disk >= 4.14.1_16-1.6
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-SLE-POS-12-SP2-CLIENT-2020-3913
SUSE Linux Enterprise Server 11 SP4-LTSS
  • xen >= 4.4.4_48-61.61.1
  • xen-doc-html >= 4.4.4_48-61.61.1
  • xen-kmp-default >= 4.4.4_48_3.0.101_108.117-61.61.1
  • xen-kmp-pae >= 4.4.4_48_3.0.101_108.117-61.61.1
  • xen-libs >= 4.4.4_48-61.61.1
  • xen-libs-32bit >= 4.4.4_48-61.61.1
  • xen-tools >= 4.4.4_48-61.61.1
  • xen-tools-domU >= 4.4.4_48-61.61.1
Patchnames:
slessp4-xen-14578
SUSE Linux Enterprise Server 12 SP2-BCL
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-BCL-2020-3913
SUSE Linux Enterprise Server 12 SP2-ESPOS
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-ESPOS-2020-3913
SUSE Linux Enterprise Server 12 SP2-LTSS
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-2020-3913
SUSE Linux Enterprise Server 12 SP3-BCL
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-BCL-2020-3945
SUSE Linux Enterprise Server 12 SP3-ESPOS
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-ESPOS-2020-3945
SUSE Linux Enterprise Server 12 SP3-LTSS
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-2020-3945
SUSE Linux Enterprise Server 12 SP4-ESPOS
  • xen >= 4.11.4_16-2.48.1
  • xen-doc-html >= 4.11.4_16-2.48.1
  • xen-libs >= 4.11.4_16-2.48.1
  • xen-libs-32bit >= 4.11.4_16-2.48.1
  • xen-tools >= 4.11.4_16-2.48.1
  • xen-tools-domU >= 4.11.4_16-2.48.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-ESPOS-2020-3914
SUSE Linux Enterprise Server 12 SP4-LTSS
  • xen >= 4.11.4_16-2.48.1
  • xen-doc-html >= 4.11.4_16-2.48.1
  • xen-libs >= 4.11.4_16-2.48.1
  • xen-libs-32bit >= 4.11.4_16-2.48.1
  • xen-tools >= 4.11.4_16-2.48.1
  • xen-tools-domU >= 4.11.4_16-2.48.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-LTSS-2020-3914
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • xen >= 4.12.4_06-3.36.1
  • xen-doc-html >= 4.12.4_06-3.36.1
  • xen-libs >= 4.12.4_06-3.36.1
  • xen-libs-32bit >= 4.12.4_06-3.36.1
  • xen-tools >= 4.12.4_06-3.36.1
  • xen-tools-domU >= 4.12.4_06-3.36.1
Patchnames:
SUSE-SLE-SERVER-12-SP5-2020-3880
SUSE Linux Enterprise Server 15-LTSS
  • xen >= 4.10.4_24-3.53.1
  • xen-devel >= 4.10.4_24-3.53.1
  • xen-libs >= 4.10.4_24-3.53.1
  • xen-tools >= 4.10.4_24-3.53.1
  • xen-tools-domU >= 4.10.4_24-3.53.1
Patchnames:
SUSE-SLE-Product-SLES-15-2020-3916
SUSE Linux Enterprise Server for SAP Applications 12 SP2
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-SLE-SAP-12-SP2-2020-3913
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-SLE-SAP-12-SP3-2020-3945
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • xen >= 4.11.4_16-2.48.1
  • xen-doc-html >= 4.11.4_16-2.48.1
  • xen-libs >= 4.11.4_16-2.48.1
  • xen-libs-32bit >= 4.11.4_16-2.48.1
  • xen-tools >= 4.11.4_16-2.48.1
  • xen-tools-domU >= 4.11.4_16-2.48.1
Patchnames:
SUSE-SLE-SAP-12-SP4-2020-3914
SUSE Linux Enterprise Server for SAP Applications 15
  • xen >= 4.10.4_24-3.53.1
  • xen-devel >= 4.10.4_24-3.53.1
  • xen-libs >= 4.10.4_24-3.53.1
  • xen-tools >= 4.10.4_24-3.53.1
  • xen-tools-domU >= 4.10.4_24-3.53.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2020-3916
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen-devel >= 4.12.4_06-3.36.1
Patchnames:
SUSE-SLE-SDK-12-SP5-2020-3880
SUSE OpenStack Cloud 7
  • xen >= 4.7.6_14-43.73.1
  • xen-doc-html >= 4.7.6_14-43.73.1
  • xen-libs >= 4.7.6_14-43.73.1
  • xen-libs-32bit >= 4.7.6_14-43.73.1
  • xen-tools >= 4.7.6_14-43.73.1
  • xen-tools-domU >= 4.7.6_14-43.73.1
Patchnames:
SUSE-OpenStack-Cloud-7-2020-3913
SUSE OpenStack Cloud 8
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-OpenStack-Cloud-8-2020-3945
SUSE OpenStack Cloud 9
  • xen >= 4.11.4_16-2.48.1
  • xen-doc-html >= 4.11.4_16-2.48.1
  • xen-libs >= 4.11.4_16-2.48.1
  • xen-libs-32bit >= 4.11.4_16-2.48.1
  • xen-tools >= 4.11.4_16-2.48.1
  • xen-tools-domU >= 4.11.4_16-2.48.1
Patchnames:
SUSE-OpenStack-Cloud-9-2020-3914
SUSE OpenStack Cloud Crowbar 8
  • xen >= 4.9.4_16-3.80.1
  • xen-doc-html >= 4.9.4_16-3.80.1
  • xen-libs >= 4.9.4_16-3.80.1
  • xen-libs-32bit >= 4.9.4_16-3.80.1
  • xen-tools >= 4.9.4_16-3.80.1
  • xen-tools-domU >= 4.9.4_16-3.80.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-8-2020-3945
SUSE OpenStack Cloud Crowbar 9
  • xen >= 4.11.4_16-2.48.1
  • xen-doc-html >= 4.11.4_16-2.48.1
  • xen-libs >= 4.11.4_16-2.48.1
  • xen-libs-32bit >= 4.11.4_16-2.48.1
  • xen-tools >= 4.11.4_16-2.48.1
  • xen-tools-domU >= 4.11.4_16-2.48.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-9-2020-3914
openSUSE Leap 15.1
  • xen >= 4.12.4_06-lp151.2.36.1
  • xen-devel >= 4.12.4_06-lp151.2.36.1
  • xen-doc-html >= 4.12.4_06-lp151.2.36.1
  • xen-libs >= 4.12.4_06-lp151.2.36.1
  • xen-libs-32bit >= 4.12.4_06-lp151.2.36.1
  • xen-tools >= 4.12.4_06-lp151.2.36.1
  • xen-tools-domU >= 4.12.4_06-lp151.2.36.1
Patchnames:
openSUSE-2020-2313
openSUSE Leap 15.2
  • xen >= 4.13.2_06-lp152.2.21.1
  • xen-devel >= 4.13.2_06-lp152.2.21.1
  • xen-doc-html >= 4.13.2_06-lp152.2.21.1
  • xen-libs >= 4.13.2_06-lp152.2.21.1
  • xen-libs-32bit >= 4.13.2_06-lp152.2.21.1
  • xen-tools >= 4.13.2_06-lp152.2.21.1
  • xen-tools-domU >= 4.13.2_06-lp152.2.21.1
  • xen-tools-xendomains-wait-disk >= 4.13.2_06-lp152.2.21.1
Patchnames:
openSUSE-2020-2331
openSUSE Tumbleweed
  • xen >= 4.15.1_01-1.2
  • xen-devel >= 4.15.1_01-1.2
  • xen-doc-html >= 4.15.1_01-1.2
  • xen-libs >= 4.15.1_01-1.2
  • xen-libs-32bit >= 4.15.1_01-1.2
  • xen-tools >= 4.15.1_01-1.2
  • xen-tools-domU >= 4.15.1_01-1.2
  • xen-tools-xendomains-wait-disk >= 4.15.1_01-1.2
Patchnames:
openSUSE Tumbleweed GA xen-4.15.1_01-1.2


First public cloud image revisions this CVE is fixed in:


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 In progress
SUSE CaaS Platform 4.0 xen In progress
SUSE Enterprise Storage 5 xen Affected
SUSE Enterprise Storage 6 xen In progress
SUSE Linux Enterprise High Performance Computing 12 SP5 xen Released
SUSE Linux Enterprise High Performance Computing 15 LTSS xen In progress
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS xen In progress
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 Unsupported
SUSE Linux Enterprise Point of Service Image Server 12 SP2 xen Affected
SUSE Linux Enterprise Server 11 SP4 LTSS xen In progress
SUSE Linux Enterprise Server 12 SP2 ESPOS xen Affected
SUSE Linux Enterprise Server 12 SP2 LTSS xen Affected
SUSE Linux Enterprise Server 12 SP3 ESPOS xen In progress
SUSE Linux Enterprise Server 12 SP3 LTSS xen In progress
SUSE Linux Enterprise Server 12 SP4 ESPOS xen In progress
SUSE Linux Enterprise Server 12 SP4 LTSS xen In progress
SUSE Linux Enterprise Server 12 SP5 xen Released
SUSE Linux Enterprise Server 15 ESPOS xen In progress
SUSE Linux Enterprise Server 15 LTSS xen In progress
SUSE Linux Enterprise Server 15 SP1 LTSS xen In progress
SUSE Linux Enterprise Server BCL 12 SP2 xen In progress
SUSE Linux Enterprise Server BCL 12 SP3 xen In progress
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 xen In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 xen In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xen Released
SUSE Linux Enterprise Server for SAP Applications 15 xen In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP1 xen In progress
SUSE Manager Proxy 4.0 xen In progress
SUSE Manager Retail Branch Server 4.0 xen In progress
SUSE Manager Server 4.0 xen In progress
SUSE OpenStack Cloud 7 xen Affected
SUSE OpenStack Cloud 8 xen In progress
SUSE OpenStack Cloud 9 xen In progress
SUSE OpenStack Cloud Crowbar 8 xen In progress
SUSE OpenStack Cloud Crowbar 9 xen In progress