Upstream information

CVE-2020-11743 at MITRE

Description

An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.

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 2.1
Vector AV:L/AC:L/Au:N/C:N/I:N/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
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: 1168143 [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_10-3.31.1
  • xen-tools-domU >= 4.10.4_10-3.31.1
Image SLES15-SP1-CHOST-BYOS-EC2
  • xen-libs >= 4.12.2_04-3.15.1
  • xen-tools-domU >= 4.12.2_04-3.15.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • xen >= 4.10.4_10-3.31.1
  • xen-devel >= 4.10.4_10-3.31.1
  • xen-libs >= 4.10.4_10-3.31.1
  • xen-tools >= 4.10.4_10-3.31.1
  • xen-tools-domU >= 4.10.4_10-3.31.1
Patchnames:
SUSE-SLE-Product-HPC-15-2020-1634
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • xen >= 4.12.2_04-3.15.1
  • xen-libs >= 4.12.2_04-3.15.1
  • xen-tools-domU >= 4.12.2_04-3.15.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2020-1124
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
  • xen >= 4.12.2_04-3.15.1
  • xen-devel >= 4.12.2_04-3.15.1
  • xen-doc-html >= 4.12.2_04-3.15.1
  • xen-libs >= 4.12.2_04-3.15.1
  • xen-libs-32bit >= 4.12.2_04-3.15.1
  • xen-tools >= 4.12.2_04-3.15.1
  • xen-tools-domU >= 4.12.2_04-3.15.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-1124
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • xen >= 4.12.2_04-3.15.1
  • xen-devel >= 4.12.2_04-3.15.1
  • xen-tools >= 4.12.2_04-3.15.1
Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP1-2020-1124
SUSE Linux Enterprise Server 12 SP4
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • xen >= 4.11.3_04-2.23.1
  • xen-doc-html >= 4.11.3_04-2.23.1
  • xen-libs >= 4.11.3_04-2.23.1
  • xen-libs-32bit >= 4.11.3_04-2.23.1
  • xen-tools >= 4.11.3_04-2.23.1
  • xen-tools-domU >= 4.11.3_04-2.23.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-2020-1138
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • xen >= 4.12.2_04-3.11.1
  • xen-doc-html >= 4.12.2_04-3.11.1
  • xen-libs >= 4.12.2_04-3.11.1
  • xen-libs-32bit >= 4.12.2_04-3.11.1
  • xen-tools >= 4.12.2_04-3.11.1
  • xen-tools-domU >= 4.12.2_04-3.11.1
Patchnames:
SUSE-SLE-SERVER-12-SP5-2020-1139
SUSE Linux Enterprise Server 15-LTSS
  • xen >= 4.10.4_10-3.31.1
  • xen-devel >= 4.10.4_10-3.31.1
  • xen-libs >= 4.10.4_10-3.31.1
  • xen-tools >= 4.10.4_10-3.31.1
  • xen-tools-domU >= 4.10.4_10-3.31.1
Patchnames:
SUSE-SLE-Product-SLES-15-2020-1634
SUSE Linux Enterprise Server for SAP Applications 15
  • xen >= 4.10.4_10-3.31.1
  • xen-devel >= 4.10.4_10-3.31.1
  • xen-libs >= 4.10.4_10-3.31.1
  • xen-tools >= 4.10.4_10-3.31.1
  • xen-tools-domU >= 4.10.4_10-3.31.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2020-1634
SUSE Linux Enterprise Software Development Kit 12 SP4
  • xen >= 4.11.3_04-2.23.1
  • xen-devel >= 4.11.3_04-2.23.1
Patchnames:
SUSE-SLE-SDK-12-SP4-2020-1138
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen >= 4.12.2_04-3.11.1
  • xen-devel >= 4.12.2_04-3.11.1
Patchnames:
SUSE-SLE-SDK-12-SP5-2020-1139
openSUSE Leap 15.1
  • xen >= 4.12.2_04-lp151.2.15.1
  • xen-debugsource >= 4.12.2_04-lp151.2.15.1
  • xen-devel >= 4.12.2_04-lp151.2.15.1
  • xen-doc-html >= 4.12.2_04-lp151.2.15.1
  • xen-libs >= 4.12.2_04-lp151.2.15.1
  • xen-libs-32bit >= 4.12.2_04-lp151.2.15.1
  • xen-libs-32bit-debuginfo >= 4.12.2_04-lp151.2.15.1
  • xen-libs-debuginfo >= 4.12.2_04-lp151.2.15.1
  • xen-tools >= 4.12.2_04-lp151.2.15.1
  • xen-tools-debuginfo >= 4.12.2_04-lp151.2.15.1
  • xen-tools-domU >= 4.12.2_04-lp151.2.15.1
  • xen-tools-domU-debuginfo >= 4.12.2_04-lp151.2.15.1
Patchnames:
openSUSE-2020-599


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 Container as a Service Platform 1.0 xen Affected
SUSE Container as a Service Platform 2.0 xen Not affected
SUSE Linux Enterprise 15-SP1 Module for Basesystem xen Released
SUSE Linux Enterprise 15-SP1 Module for Server Applications xen Released
SUSE Linux Enterprise High Performance Computing 12 SP4 xen Released
SUSE Linux Enterprise High Performance Computing 12 SP5 xen Released
SUSE Linux Enterprise High Performance Computing 15 LTSS xen Released
SUSE Linux Enterprise Server 11 SP1 xen Not affected
SUSE Linux Enterprise Server 11 SP3 xen Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP1 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 Released
SUSE Linux Enterprise Server 12 SP5 xen Released
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 Software Development Kit 12 SP4 xen Released
SUSE Linux Enterprise Software Development Kit 12 SP5 xen Released