Upstream information

CVE-2021-28687 at MITRE

Description

HVM soft-reset crashes toolstack libxl requires all data structures passed across its public interface to be initialized before use and disposed of afterwards by calling a specific set of functions. Many internal data structures also require this initialize / dispose discipline, but not all of them. When the "soft reset" feature was implemented, the libxl__domain_suspend_state structure didn't require any initialization or disposal. At some point later, an initialization function was introduced for the structure; but the "soft reset" path wasn't refactored to call the initialization function. When a guest nwo initiates a "soft reboot", uninitialized data structure leads to an assert() when later code finds the structure in an unexpected state. The effect of this is to crash the process monitoring the guest. How this affects the system depends on the structure of the toolstack. For xl, this will have no security-relevant effect: every VM has its own independent monitoring process, which contains no state. The domain in question will hang in a crashed state, but can be destroyed by `xl destroy` just like any other non-cooperating domain. For daemon-based toolstacks linked against libxl, such as libvirt, this will crash the toolstack, losing the state of any in-progress operations (localized DoS), and preventing further administrator operations unless the daemon is configured to restart automatically (system-wide DoS). If crashes "leak" resources, then repeated crashes could use up resources, also causing a system-wide DoS.

SUSE information

Overall state of this security issue: Analysis

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
Base Score 5.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1183072 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES15-SP2-CHOST-BYOS-Aliyun
Image SLES15-SP2-CHOST-BYOS-Azure
Image SLES15-SP2-CHOST-BYOS-GCE
  • xen-libs >= 4.13.2_08-3.25.3
Image SLES15-SP2-CHOST-BYOS-EC2
  • xen-libs >= 4.13.2_08-3.25.3
  • xen-tools-domU >= 4.13.2_08-3.25.3
SUSE CaaS Platform 4.0
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SUSE-CAASP-4.0-2021-1460
SUSE Enterprise Storage 6
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-Storage-6-2021-1460
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-HPC-15-SP1-ESPOS-2021-1460
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-HPC-15-SP1-LTSS-2021-1460
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • xen-libs >= 4.13.2_08-3.25.3
  • xen-tools-domU >= 4.13.2_08-3.25.3
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2021-1028
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 SP2
  • xen >= 4.13.2_08-3.25.3
  • xen-devel >= 4.13.2_08-3.25.3
  • xen-doc-html >= 4.13.2_08-3.25.3
  • xen-libs >= 4.13.2_08-3.25.3
  • xen-libs-32bit >= 4.13.2_08-3.25.3
  • xen-tools >= 4.13.2_08-3.25.3
  • xen-tools-domU >= 4.13.2_08-3.25.3
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2021-1028
SUSE Linux Enterprise Module for Server Applications 15 SP2
  • xen >= 4.13.2_08-3.25.3
  • xen-devel >= 4.13.2_08-3.25.3
  • xen-tools >= 4.13.2_08-3.25.3
  • xen-tools-xendomains-wait-disk >= 4.13.2_08-3.25.3
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP2-2021-1028
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 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • xen >= 4.12.4_09-3.39.3
  • xen-doc-html >= 4.12.4_09-3.39.3
  • xen-libs >= 4.12.4_09-3.39.3
  • xen-libs-32bit >= 4.12.4_09-3.39.3
  • xen-tools >= 4.12.4_09-3.39.3
  • xen-tools-domU >= 4.12.4_09-3.39.3
Patchnames:
SUSE-SLE-SERVER-12-SP5-2021-1023
SUSE Linux Enterprise Server 15 SP1-BCL
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SLES-15-SP1-BCL-2021-1460
SUSE Linux Enterprise Server 15 SP1-LTSS
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SLES-15-SP1-LTSS-2021-1460
SUSE Linux Enterprise Server for SAP Applications 15 SP1
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP1-2021-1460
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen-devel >= 4.12.4_09-3.39.3
Patchnames:
SUSE-SLE-SDK-12-SP5-2021-1023
SUSE Manager Proxy 4.0
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Proxy-4.0-2021-1460
SUSE Manager Retail Branch Server 4.0
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.0-2021-1460
SUSE Manager Server 4.0
  • xen >= 4.12.4_08-3.43.3
  • xen-devel >= 4.12.4_08-3.43.3
  • xen-libs >= 4.12.4_08-3.43.3
  • xen-tools >= 4.12.4_08-3.43.3
  • xen-tools-domU >= 4.12.4_08-3.43.3
Patchnames:
SUSE-SLE-Product-SUSE-Manager-Server-4.0-2021-1460
SUSE MicroOS 5.0
  • xen-libs >= 4.13.2_08-3.25.3
Patchnames:
SUSE-SUSE-MicroOS-5.0-2021-1028
openSUSE Leap 15.2
  • xen >= 4.13.2_08-lp152.2.24.1
  • xen-devel >= 4.13.2_08-lp152.2.24.1
  • xen-doc-html >= 4.13.2_08-lp152.2.24.1
  • xen-libs >= 4.13.2_08-lp152.2.24.1
  • xen-libs-32bit >= 4.13.2_08-lp152.2.24.1
  • xen-tools >= 4.13.2_08-lp152.2.24.1
  • xen-tools-domU >= 4.13.2_08-lp152.2.24.1
  • xen-tools-xendomains-wait-disk >= 4.13.2_08-lp152.2.24.1
Patchnames:
openSUSE-2021-514
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 Analysis
SLES-LTSS-SAP xen Analysis
SUSE CaaS Platform 4.0 xen In progress
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 Analysis
SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS xen Released
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS xen In progress
SUSE Linux Enterprise Micro 5.0 xen Released
SUSE Linux Enterprise Micro 5.1 xen Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP2 xen Released
SUSE Linux Enterprise Module for Basesystem 15 SP3 xen Already fixed
SUSE Linux Enterprise Module for Server Applications 15 SP2 xen Released
SUSE Linux Enterprise Module for Server Applications 15 SP3 xen Already fixed
SUSE Linux Enterprise Point of Service 11 SP3 xen Analysis
SUSE Linux Enterprise Point of Service Image Server 12 SP2 xen Unsupported
SUSE Linux Enterprise Server 11 SP1 xen Analysis
SUSE Linux Enterprise Server 11 SP3 xen Analysis
SUSE Linux Enterprise Server 11 SP4 xen Analysis
SUSE Linux Enterprise Server 11 SP4 LTSS xen Analysis
SUSE Linux Enterprise Server 12 SP2 ESPOS xen Unsupported
SUSE Linux Enterprise Server 12 SP2 LTSS xen Unsupported
SUSE Linux Enterprise Server 12 SP3 ESPOS xen Analysis
SUSE Linux Enterprise Server 12 SP3 LTSS xen Analysis
SUSE Linux Enterprise Server 12 SP4 ESPOS xen Analysis
SUSE Linux Enterprise Server 12 SP4 LTSS xen Analysis
SUSE Linux Enterprise Server 12 SP5 xen Released
SUSE Linux Enterprise Server 15 ESPOS xen Analysis
SUSE Linux Enterprise Server 15 LTSS xen Analysis
SUSE Linux Enterprise Server 15 SP1 LTSS xen In progress
SUSE Linux Enterprise Server BCL 12 SP2 xen Analysis
SUSE Linux Enterprise Server BCL 12 SP3 xen Analysis
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 xen In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen Unsupported
SUSE Linux Enterprise Server for SAP Applications 12 SP3 xen Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xen Released
SUSE Linux Enterprise Server for SAP Applications 15 xen Analysis
SUSE Linux Enterprise Server for SAP Applications 15 SP1 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 7 xen Unsupported
SUSE OpenStack Cloud 8 xen Analysis
SUSE OpenStack Cloud 9 xen Analysis
SUSE OpenStack Cloud Crowbar 8 xen Analysis
SUSE OpenStack Cloud Crowbar 9 xen Analysis