Upstream information
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: Resolved
This issue is currently rated as having moderate severity.
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 |
National Vulnerability Database | SUSE | |
---|---|---|
Base Score | 6 | 5.5 |
Vector | AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Access Vector | Local | Local |
Access Complexity | Low | Low |
Privileges Required | High | Low |
User Interaction | None | None |
Scope | Changed | Unchanged |
Confidentiality Impact | None | None |
Integrity Impact | None | None |
Availability Impact | High | High |
CVSSv3 Version | 3.0 | 3.0 |
- SUSE-SU-2018:3332-1, published Tue Oct 23 10:15:17 MDT 2018
- SUSE-SU-2018:3490-1, published Fri Oct 26 10:14:51 MDT 2018
- SUSE-SU-2018:4300-1, published Fri Dec 28 16:17:00 MST 2018
- openSUSE-SU-2018:4304-1, published Sat, 29 Dec 2018 15:11:23 +0100 (CET)
List of released packages
Product(s) | Fixed package version(s) | References |
---|---|---|
SUSE CaaS Platform 3.0 |
| Patchnames: SUSE-CAASP-3.0-2018-2492 |
SUSE CaaS Platform ALL |
| Patchnames: SUSE-CAASP-ALL-2018-2492 |
SUSE Enterprise Storage 4 |
| Patchnames: SUSE-Storage-4-2018-2398 |
SUSE Linux Enterprise Desktop 12 SP3 |
| Patchnames: SUSE-SLE-DESKTOP-12-SP3-2018-2492 |
SUSE Linux Enterprise Module for Basesystem 15 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-2018-3063 |
SUSE Linux Enterprise Module for Basesystem 15 SP1 |
| Patchnames: SUSE Linux Enterprise Module for Basesystem 15 SP1 GA xen-libs |
SUSE Linux Enterprise Module for Server Applications 15 |
| Patchnames: SUSE-SLE-Module-Server-Applications-15-2018-3063 |
SUSE Linux Enterprise Module for Server Applications 15 SP1 |
| Patchnames: SUSE Linux Enterprise Module for Server Applications 15 SP1 GA xen |
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT |
| Patchnames: SUSE-SLE-POS-12-SP2-CLIENT-2018-2398 |
SUSE Linux Enterprise Server 12 SP2-BCL |
| Patchnames: SUSE-SLE-SERVER-12-SP2-BCL-2018-2398 |
SUSE Linux Enterprise Server 12 SP2-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-ESPOS-2018-2398 |
SUSE Linux Enterprise Server 12 SP2-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-2018-2398 |
SUSE Linux Enterprise Server 12 SP3 |
| Patchnames: SUSE-SLE-SERVER-12-SP3-2018-2492 |
SUSE Linux Enterprise Server for SAP Applications 12 SP2 |
| Patchnames: SUSE-SLE-SAP-12-SP2-2018-2398 |
SUSE Linux Enterprise Server for SAP Applications 12 SP2-BCL |
| Patchnames: SUSE-SLE-SERVER-12-SP2-BCL-2018-2398 |
SUSE Linux Enterprise Server for SAP Applications 12 SP2-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-ESPOS-2018-2398 |
SUSE Linux Enterprise Server for SAP Applications 12 SP2-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP2-2018-2398 |
SUSE Linux Enterprise Server for SAP Applications 12 SP3 |
| Patchnames: SUSE-SLE-SERVER-12-SP3-2018-2492 |
SUSE Linux Enterprise Software Development Kit 12 SP3 |
| Patchnames: SUSE-SLE-SDK-12-SP3-2018-2492 |
SUSE OpenStack Cloud 7 |
| Patchnames: SUSE-OpenStack-Cloud-7-2018-2398 |
openSUSE Leap 15.0 |
| Patchnames: openSUSE-2019-1046 |
openSUSE Leap 42.3 |
| Patchnames: openSUSE-2018-1331 |
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 | Released |
CaaS Platform 3.0 | xen | Released |
SUSE Linux Enterprise Desktop 12 SP3 | xen | Released |
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 | Released |
SUSE Linux Enterprise Server 11 SP4 | xen | Not affected |
SUSE Linux Enterprise Server 12 SP2 LTSS | xen | Released |
SUSE Linux Enterprise Server 12 SP3 | xen | Released |
SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | Released |