Upstream information

CVE-2018-15468 at MITRE

Description

An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v3 Scores
  SUSE
Base Score 5.5
Vector 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
SUSE Bugzilla entry: 1103276 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of packages in QA

Product(s) Package(s)
SUSE CaaS Platform 3.0
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
  • xen-tools-domU-debuginfo >= 4.9.3_03-3.44.2
SUSE CaaS Platform ALL
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
  • xen-tools-domU-debuginfo >= 4.9.3_03-3.44.2
SUSE Enterprise Storage 4
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Desktop 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-32bit >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo-32bit >= 4.9.3_03-3.44.2
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server 12 SP2-BCL
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server 12 SP2-ESPOS
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server 12 SP2-LTSS
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-doc-html >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-32bit >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo-32bit >= 4.9.3_03-3.44.2
  • xen-tools >= 4.9.3_03-3.44.2
  • xen-tools-debuginfo >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
  • xen-tools-domU-debuginfo >= 4.9.3_03-3.44.2
SUSE Linux Enterprise Server for SAP Applications 12 SP2
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server for SAP Applications 12 SP2-BCL
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server for SAP Applications 12 SP2-ESPOS
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server for SAP Applications 12 SP2-LTSS
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-doc-html >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-32bit >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo >= 4.9.3_03-3.44.2
  • xen-libs-debuginfo-32bit >= 4.9.3_03-3.44.2
  • xen-tools >= 4.9.3_03-3.44.2
  • xen-tools-debuginfo >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
  • xen-tools-domU-debuginfo >= 4.9.3_03-3.44.2
SUSE Linux Enterprise Software Development Kit 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-debugsource >= 4.9.3_03-3.44.2
  • xen-devel >= 4.9.3_03-3.44.2
SUSE OpenStack Cloud 7
  • xen >= 4.7.6_05-43.42.1
  • xen-debugsource >= 4.7.6_05-43.42.1
  • xen-doc-html >= 4.7.6_05-43.42.1
  • xen-libs >= 4.7.6_05-43.42.1
  • xen-libs-32bit >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo >= 4.7.6_05-43.42.1
  • xen-libs-debuginfo-32bit >= 4.7.6_05-43.42.1
  • xen-tools >= 4.7.6_05-43.42.1
  • xen-tools-debuginfo >= 4.7.6_05-43.42.1
  • xen-tools-domU >= 4.7.6_05-43.42.1
  • xen-tools-domU-debuginfo >= 4.7.6_05-43.42.1

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
CaaS Platform 2.0 xen In progress
CaaS Platform 3.0 xen In progress
SUSE Linux Enterprise Desktop 12 SP3 xen In progress
SUSE Linux Enterprise Module for Basesystem 15 GA xen Released
SUSE Linux Enterprise Module for Server Applications 15 GA xen Released
SUSE Linux Enterprise SDK 11 SP4 xen Not affected
SUSE Linux Enterprise SDK 12 SP3 xen In progress
SUSE Linux Enterprise Server 11 SP4 xen Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS xen In progress
SUSE Linux Enterprise Server 12 SP3 xen In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP2 xen In progress