Upstream information

CVE-2020-15566 at MITRE

Description

An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a host OS crash because of incorrect error handling in event-channel port allocation. The allocation of an event-channel port may fail for multiple reasons: (1) port is already in use, (2) the memory allocation failed, or (3) the port we try to allocate is higher than what is supported by the ABI (e.g., 2L or FIFO) used by the guest or the limit set by an administrator (max_event_channels in xl cfg). Due to the missing error checks, only (1) will be considered an error. All the other cases will provide a valid port and will result in a crash when trying to access the event channel. When the administrator configured a guest to allow more than 1023 event channels, that guest may be able to crash the host. When Xen is out-of-memory, allocation of new event channels will result in crashing the host rather than reporting an error. Xen versions 4.10 and later are affected. All architectures are affected. The default configuration, when guests are created with xl/libxl, is not vulnerable, because of the default event-channel limit.

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 4.7
Vector AV:L/AC:M/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 6.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1173376 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES15-EC2-CHOST-HVM-BYOS
  • xen-libs >= 4.10.4_12-3.35.1
  • xen-tools-domU >= 4.10.4_12-3.35.1
Image SLES15-SP1-CHOST-BYOS-EC2
  • xen-libs >= 4.12.3_04-3.22.1
  • xen-tools-domU >= 4.12.3_04-3.22.1
Image SLES15-SP2-CHOST-BYOS-Aliyun
Image SLES15-SP2-CHOST-BYOS-Azure
Image SLES15-SP2-CHOST-BYOS-GCE
Image SLES15-SP2-CHOST-BYOS-OpenStack
  • xen-libs >= 4.13.1_04-3.4.1
Image SLES15-SP2-CHOST-BYOS-EC2
  • xen-libs >= 4.13.1_04-3.4.1
  • xen-tools-domU >= 4.13.1_04-3.4.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • xen >= 4.10.4_12-3.35.1
  • xen-devel >= 4.10.4_12-3.35.1
  • xen-libs >= 4.10.4_12-3.35.1
  • xen-tools >= 4.10.4_12-3.35.1
  • xen-tools-domU >= 4.10.4_12-3.35.1
Patchnames:
SUSE-SLE-Product-HPC-15-2020-1888
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • xen-libs >= 4.12.3_04-3.22.1
  • xen-tools-domU >= 4.12.3_04-3.22.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2020-1889
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • xen-libs >= 4.13.1_04-3.4.1
  • xen-tools-domU >= 4.13.1_04-3.4.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2020-1902
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 >= 4.12.3_04-3.22.1
  • xen-devel >= 4.12.3_04-3.22.1
  • xen-doc-html >= 4.12.3_04-3.22.1
  • xen-libs >= 4.12.3_04-3.22.1
  • xen-libs-32bit >= 4.12.3_04-3.22.1
  • xen-tools >= 4.12.3_04-3.22.1
  • xen-tools-domU >= 4.12.3_04-3.22.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-1889
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2
  • xen >= 4.13.1_04-3.4.1
  • xen-devel >= 4.13.1_04-3.4.1
  • xen-doc-html >= 4.13.1_04-3.4.1
  • xen-libs >= 4.13.1_04-3.4.1
  • xen-libs-32bit >= 4.13.1_04-3.4.1
  • xen-tools >= 4.13.1_04-3.4.1
  • xen-tools-domU >= 4.13.1_04-3.4.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2020-1902
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • xen >= 4.12.3_04-3.22.1
  • xen-devel >= 4.12.3_04-3.22.1
  • xen-tools >= 4.12.3_04-3.22.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP1-2020-1889
SUSE Linux Enterprise Module for Server Applications 15 SP2
  • xen >= 4.13.1_04-3.4.1
  • xen-devel >= 4.13.1_04-3.4.1
  • xen-tools >= 4.13.1_04-3.4.1
  • xen-tools-xendomains-wait-disk >= 4.13.1_04-3.4.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP2-2020-1902
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 Server 12 SP4-ESPOS
  • xen >= 4.11.4_04-2.30.1
  • xen-doc-html >= 4.11.4_04-2.30.1
  • xen-libs >= 4.11.4_04-2.30.1
  • xen-libs-32bit >= 4.11.4_04-2.30.1
  • xen-tools >= 4.11.4_04-2.30.1
  • xen-tools-domU >= 4.11.4_04-2.30.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-ESPOS-2020-1891
SUSE Linux Enterprise Server 12 SP4-LTSS
  • xen >= 4.11.4_04-2.30.1
  • xen-doc-html >= 4.11.4_04-2.30.1
  • xen-libs >= 4.11.4_04-2.30.1
  • xen-libs-32bit >= 4.11.4_04-2.30.1
  • xen-tools >= 4.11.4_04-2.30.1
  • xen-tools-domU >= 4.11.4_04-2.30.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-LTSS-2020-1891
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • xen >= 4.12.3_04-3.18.1
  • xen-doc-html >= 4.12.3_04-3.18.1
  • xen-libs >= 4.12.3_04-3.18.1
  • xen-libs-32bit >= 4.12.3_04-3.18.1
  • xen-tools >= 4.12.3_04-3.18.1
  • xen-tools-domU >= 4.12.3_04-3.18.1
Patchnames:
SUSE-SLE-SERVER-12-SP5-2020-1887
SUSE Linux Enterprise Server 15-LTSS
  • xen >= 4.10.4_12-3.35.1
  • xen-devel >= 4.10.4_12-3.35.1
  • xen-libs >= 4.10.4_12-3.35.1
  • xen-tools >= 4.10.4_12-3.35.1
  • xen-tools-domU >= 4.10.4_12-3.35.1
Patchnames:
SUSE-SLE-Product-SLES-15-2020-1888
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • xen >= 4.11.4_04-2.30.1
  • xen-doc-html >= 4.11.4_04-2.30.1
  • xen-libs >= 4.11.4_04-2.30.1
  • xen-libs-32bit >= 4.11.4_04-2.30.1
  • xen-tools >= 4.11.4_04-2.30.1
  • xen-tools-domU >= 4.11.4_04-2.30.1
Patchnames:
SUSE-SLE-SAP-12-SP4-2020-1891
SUSE Linux Enterprise Server for SAP Applications 15
  • xen >= 4.10.4_12-3.35.1
  • xen-devel >= 4.10.4_12-3.35.1
  • xen-libs >= 4.10.4_12-3.35.1
  • xen-tools >= 4.10.4_12-3.35.1
  • xen-tools-domU >= 4.10.4_12-3.35.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2020-1888
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen-devel >= 4.12.3_04-3.18.1
Patchnames:
SUSE-SLE-SDK-12-SP5-2020-1887
SUSE OpenStack Cloud 9
  • xen >= 4.11.4_04-2.30.1
  • xen-doc-html >= 4.11.4_04-2.30.1
  • xen-libs >= 4.11.4_04-2.30.1
  • xen-libs-32bit >= 4.11.4_04-2.30.1
  • xen-tools >= 4.11.4_04-2.30.1
  • xen-tools-domU >= 4.11.4_04-2.30.1
Patchnames:
SUSE-OpenStack-Cloud-9-2020-1891
SUSE OpenStack Cloud Crowbar 9
  • xen >= 4.11.4_04-2.30.1
  • xen-doc-html >= 4.11.4_04-2.30.1
  • xen-libs >= 4.11.4_04-2.30.1
  • xen-libs-32bit >= 4.11.4_04-2.30.1
  • xen-tools >= 4.11.4_04-2.30.1
  • xen-tools-domU >= 4.11.4_04-2.30.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-9-2020-1891
openSUSE Leap 15.1
  • xen >= 4.12.3_04-lp151.2.21.1
  • xen-debugsource >= 4.12.3_04-lp151.2.21.1
  • xen-devel >= 4.12.3_04-lp151.2.21.1
  • xen-doc-html >= 4.12.3_04-lp151.2.21.1
  • xen-libs >= 4.12.3_04-lp151.2.21.1
  • xen-libs-32bit >= 4.12.3_04-lp151.2.21.1
  • xen-libs-32bit-debuginfo >= 4.12.3_04-lp151.2.21.1
  • xen-libs-debuginfo >= 4.12.3_04-lp151.2.21.1
  • xen-tools >= 4.12.3_04-lp151.2.21.1
  • xen-tools-debuginfo >= 4.12.3_04-lp151.2.21.1
  • xen-tools-domU >= 4.12.3_04-lp151.2.21.1
  • xen-tools-domU-debuginfo >= 4.12.3_04-lp151.2.21.1
Patchnames:
openSUSE-2020-965
openSUSE Leap 15.2
  • xen >= 4.13.1_04-lp152.2.3.1
  • xen-debugsource >= 4.13.1_04-lp152.2.3.1
  • xen-devel >= 4.13.1_04-lp152.2.3.1
  • xen-doc-html >= 4.13.1_04-lp152.2.3.1
  • xen-libs >= 4.13.1_04-lp152.2.3.1
  • xen-libs-32bit >= 4.13.1_04-lp152.2.3.1
  • xen-libs-32bit-debuginfo >= 4.13.1_04-lp152.2.3.1
  • xen-libs-debuginfo >= 4.13.1_04-lp152.2.3.1
  • xen-tools >= 4.13.1_04-lp152.2.3.1
  • xen-tools-debuginfo >= 4.13.1_04-lp152.2.3.1
  • xen-tools-domU >= 4.13.1_04-lp152.2.3.1
  • xen-tools-domU-debuginfo >= 4.13.1_04-lp152.2.3.1
  • xen-tools-xendomains-wait-disk >= 4.13.1_04-lp152.2.3.1
Patchnames:
openSUSE-2020-985


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
SUSE CaaS Platform 3.0 xen Not affected
SUSE CaaS Platform 4.0 xen In progress
SUSE Container as a Service Platform 1.0 xen Affected
SUSE Container as a Service Platform 2.0 xen Not affected
SUSE Enterprise Storage 6 xen In progress
SUSE Linux Enterprise High Performance Computing 12 SP4 xen In progress
SUSE Linux Enterprise High Performance Computing 12 SP5 xen Released
SUSE Linux Enterprise High Performance Computing 15 LTSS xen Released
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 Server 11 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP2 BCL xen Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP3 BCL xen Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP4 xen In progress
SUSE Linux Enterprise Server 12 SP4 ESPOS xen In progress
SUSE Linux Enterprise Server 12 SP4 LTSS xen Released
SUSE Linux Enterprise Server 12 SP5 xen Released
SUSE Linux Enterprise Server 15 LTSS xen In progress
SUSE Linux Enterprise Server 15 SP1 Business Critical Linux xen In progress
SUSE Linux Enterprise Server 15 SP1 LTSS xen In progress
SUSE Linux Enterprise Server ESPOS 15 xen Released
SUSE Linux Enterprise Server for SAP Applications 12 SP2 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 Released
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 Linux Enterprise Software Development Kit 12 SP4 xen In progress
SUSE Linux Enterprise Software Development Kit 12 SP5 xen Released
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 9 xen In progress
SUSE OpenStack Cloud Crowbar 9 xen In progress