Upstream information
Description
x86: Speculative vulnerabilities with bare (non-shim) 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to virtualization. In AMD64, Xen had to use a different implementation approach, so Xen does not use ring 1 to support 64-bit guests. With the focus now being on 64-bit systems, and the availability of explicit hardware support for virtualization, fixing speculation issues in ring 1 is not a priority for processor companies. Indirect Branch Restricted Speculation (IBRS) is an architectural x86 extension put together to combat speculative execution sidechannel attacks, including Spectre v2. It was retrofitted in microcode to existing CPUs. For more details on Spectre v2, see: http://xenbits.xen.org/xsa/advisory-254.html However, IBRS does not architecturally protect ring 0 from predictions learnt in ring 1. For more details, see: https://software.intel.com/security-software-guidance/deep-dives/deep-dive-indirect-branch-restricted-speculation Similar situations may exist with other mitigations for other kinds of speculative execution attacks. The situation is quite likely to be similar for speculative execution attacks which have yet to be discovered, disclosed, or mitigated.SUSE information
Overall state of this security issue: Running
This issue is currently rated as having moderate severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 2.1 |
| Vector | AV:L/AC:L/Au:N/C:P/I:N/A:N |
| Access Vector | Local |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | None |
| National Vulnerability Database | SUSE | |
|---|---|---|
| Base Score | 5.5 | 5.9 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N |
| Access Vector | Local | Local |
| Access Complexity | Low | High |
| Privileges Required | Low | None |
| User Interaction | None | None |
| Scope | Unchanged | Changed |
| Confidentiality Impact | High | High |
| Integrity Impact | None | None |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
- SUSE-SU-2021:1648-1, published Wed May 19 16:29:31 UTC 2021
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Server 12 SP4-ESPOS |
| Patchnames: SUSE-SLE-SERVER-12-SP4-ESPOS-2021-1648 |
| SUSE Linux Enterprise Server 12 SP4-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP4-LTSS-2021-1648 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 |
| Patchnames: SUSE-SLE-SAP-12-SP4-2021-1648 |
| SUSE OpenStack Cloud 9 |
| Patchnames: SUSE-OpenStack-Cloud-9-2021-1648 |
| SUSE OpenStack Cloud Crowbar 9 |
| Patchnames: SUSE-OpenStack-Cloud-Crowbar-9-2021-1648 |
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 | Affected |
| SUSE CaaS Platform 4.0 | xen | Affected |
| SUSE Enterprise Storage 6 | xen | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP5 | xen | Affected |
| SUSE Linux Enterprise High Performance Computing 15 LTSS | xen | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS | xen | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS | xen | Affected |
| SUSE Linux Enterprise Micro 5.0 | xen | Affected |
| SUSE Linux Enterprise Micro 5.1 | xen | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | xen | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | xen | Affected |
| SUSE Linux Enterprise Point of Service 11 SP3 | xen | Affected |
| 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 | Affected |
| SUSE Linux Enterprise Server 12 SP3 ESPOS | xen | Affected |
| SUSE Linux Enterprise Server 12 SP3 LTSS | xen | Affected |
| SUSE Linux Enterprise Server 12 SP4 ESPOS | xen | Released |
| SUSE Linux Enterprise Server 12 SP4 LTSS | xen | Released |
| SUSE Linux Enterprise Server 12 SP5 | xen | Affected |
| SUSE Linux Enterprise Server 15 ESPOS | xen | Affected |
| SUSE Linux Enterprise Server 15 LTSS | xen | Affected |
| SUSE Linux Enterprise Server 15 SP1 LTSS | xen | Affected |
| SUSE Linux Enterprise Server BCL 12 SP2 | xen | Affected |
| SUSE Linux Enterprise Server BCL 12 SP3 | xen | Affected |
| SUSE Linux Enterprise Server Business Critical Linux 15 SP1 | xen | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | Released |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | xen | Affected |
| SUSE Manager Proxy 4.0 | xen | Unsupported |
| SUSE Manager Retail Branch Server 4.0 | xen | Unsupported |
| SUSE Manager Server 4.0 | xen | Unsupported |
| SUSE OpenStack Cloud 8 | xen | Affected |
| SUSE OpenStack Cloud 9 | xen | Released |
| SUSE OpenStack Cloud Crowbar 8 | xen | Affected |
| SUSE OpenStack Cloud Crowbar 9 | xen | Released |
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