Upstream information
Description
grant table v2 status pages may remain accessible after de-allocation (take two) Guest get permitted access to certain Xen-owned pages of memory. The majority of such pages remain allocated / associated with a guest for its entire lifetime. Grant table v2 status pages, however, get de-allocated when a guest switched (back) from v2 to v1. The freeing of such pages requires that the hypervisor know where in the guest these pages were mapped. The hypervisor tracks only one use within guest space, but racing requests from the guest to insert mappings of these pages may result in any of them to become mapped in multiple locations. Upon switching back from v2 to v1, the guest would then retain access to a page that was freed and perhaps re-used for other purposes. This bug was fortuitously fixed by code cleanup in Xen 4.14, and backported to security-supported Xen branches as a prerequisite of the fix for XSA-378.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 6.9 |
| Vector | AV:L/AC:M/Au:N/C:C/I:C/A:C |
| Access Vector | Local |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Complete |
| Integrity Impact | Complete |
| Availability Impact | Complete |
| National Vulnerability Database | SUSE | |
|---|---|---|
| Base Score | 7 | 6.3 |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H |
| Attack Vector | Local | Local |
| Attack Complexity | High | High |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | High |
| Integrity Impact | High | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
Note from the SUSE Security Team on the xen package
This issue likely only affects the XEN hypervisor itself, unless otherwise stated. The userland utilities in -tools and libraries in -libs are shipped together with the xen hypervisor as they are built from one source and do not contain hypervisor specific fixes. SUSE Bugzilla entry: 1192555 [RESOLVED / FIXED]SUSE Security Advisories:
- SUSE-SU-2021:14848-1, published Wed Dec 1 21:06:05 UTC 2021
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Server 11 SP4-LTSS |
| Patchnames: slessp4-xen-14848 |
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. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Micro 5.1 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.2 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.3 | xen | Not affected |
| SUSE Linux Enterprise Micro 5.4 | xen | Not affected |
| SUSE Manager Proxy 4.3 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.3 | xen | Not affected |
| SUSE Manager Server 4.3 | xen | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP5 | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 12 SP5 | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP5-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | xen | Not affected |
| SUSE Linux Enterprise Server 15-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise Server Business Critical Linux 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Server Business Critical Linux 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | xen | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | xen | Already fixed |
| SUSE CaaS Platform 3.0 | xen | Already fixed |
| SUSE CaaS Platform 4.0 | xen | Already fixed |
| SUSE CaaS Platform 4.5 | xen | Not affected |
| SUSE Enterprise Storage 6 | xen | Already fixed |
| SUSE Enterprise Storage 7 | xen | Not affected |
| SUSE Enterprise Storage 7.1 | xen | Not affected |
| SUSE Linux Enterprise Desktop 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Desktop 11 SP4 | xen | Affected |
| SUSE Linux Enterprise Desktop 12 SP2 | xen | Already fixed |
| SUSE Linux Enterprise Desktop 12 SP3 | xen | Already fixed |
| SUSE Linux Enterprise Desktop 12 SP4 | xen | Already fixed |
| SUSE Linux Enterprise Desktop 15 | xen | Already fixed |
| SUSE Linux Enterprise Desktop 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Desktop 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Desktop 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Micro 5.0 | xen | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 | xen | Already fixed |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Module for Server Applications 15 | xen | Already fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | xen | Already fixed |
| SUSE Linux Enterprise Point of Service 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Real Time 15 SP2 | xen | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | xen | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | xen | Not affected |
| SUSE Linux Enterprise Server 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Server 11 SP3-LTSS | xen | Unsupported |
| SUSE Linux Enterprise Server 11 SP4 | xen | Affected |
| SUSE Linux Enterprise Server 11 SP4 LTSS | xen | Released |
| SUSE Linux Enterprise Server 11 SP4-LTSS | xen | Released |
| SUSE Linux Enterprise Server 12 SP2 | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP2-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP3 | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP4 | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | xen | Already fixed |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server 15 | xen | Already fixed |
| SUSE Linux Enterprise Server 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Server 15 SP1-BCL | xen | Already fixed |
| SUSE Linux Enterprise Server 15 SP1-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server 15 SP2-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | xen | Not affected |
| SUSE Linux Enterprise Server 15-LTSS | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Server for SAP Applications 11 SP4 | xen | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | Already fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | xen | Already fixed |
| SUSE Linux Enterprise Software Development Kit 11 SP3 | xen | Unsupported |
| SUSE Linux Enterprise Software Development Kit 11 SP4 | xen | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | xen | Already fixed |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | xen | Already fixed |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | xen | Already fixed |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | Already fixed |
| SUSE Manager Proxy 4.0 | xen | Already fixed |
| SUSE Manager Proxy 4.1 | xen | Not affected |
| SUSE Manager Proxy 4.2 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.0 | xen | Already fixed |
| SUSE Manager Retail Branch Server 4.1 | xen | Not affected |
| SUSE Manager Retail Branch Server 4.2 | xen | Not affected |
| SUSE Manager Server 4.0 | xen | Already fixed |
| SUSE Manager Server 4.1 | xen | Not affected |
| SUSE Manager Server 4.2 | xen | Not affected |
| SUSE OpenStack Cloud 7 | xen | Already fixed |
| SUSE OpenStack Cloud 8 | xen | Already fixed |
| SUSE OpenStack Cloud 9 | xen | Already fixed |
| SUSE OpenStack Cloud Crowbar 8 | xen | Already fixed |
| SUSE OpenStack Cloud Crowbar 9 | xen | Already fixed |
| openSUSE Leap 15.3 | xen | Not affected |
| openSUSE Leap 15.4 | xen | Not affected |
| openSUSE Leap Micro 5.2 | xen | Not affected |
| openSUSE Leap Micro 5.3 | xen | Not affected |
| openSUSE Leap Micro 5.4 | xen | Not affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Enterprise Server LTSS Extended Security 12-SP5 | xen | Already fixed |
SUSE Timeline for this CVE
CVE page created: Wed Nov 10 15:30:32 2021CVE page last modified: Tue Nov 12 19:30:30 2024