Upstream information

CVE-2020-29479 at MITRE

Description

An issue was discovered in Xen through 4.14.x. In the Ocaml xenstored implementation, the internal representation of the tree has special cases for the root node, because this node has no parent. Unfortunately, permissions were not checked for certain operations on the root node. Unprivileged guests can get and modify permissions, list, and delete the root node. (Deleting the whole xenstore tree is a host-wide denial of service.) Achieving xenstore write access is also possible. All systems using oxenstored are vulnerable. Building and using oxenstored is the default in the upstream Xen distribution, if the Ocaml compiler is available. Systems using C xenstored are not vulnerable.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.2
Vector AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 8.8
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1179511 [RESOLVED / INVALID]

No SUSE Security Announcements cross referenced.

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Please note that this evaluation state might be work in progress, incomplete or outdated.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 Not affected
SUSE Enterprise Storage 5 xen Not affected
SUSE Linux Enterprise Desktop 15 SP1 xen Not affected
SUSE Linux Enterprise Desktop 15 SP2 xen Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5 xen Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP1 xen Not affected
SUSE Linux Enterprise High Performance Computing 15 SP2 xen Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 xen Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 xen Not affected
SUSE Linux Enterprise Module for Server Applications 15 SP1 xen Not affected
SUSE Linux Enterprise Module for Server Applications 15 SP2 xen Not affected
SUSE Linux Enterprise Point of Service 11 SP3 xen Not affected
SUSE Linux Enterprise Point of Service Image Server 12 SP2 xen Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP2 BCL xen Not affected
SUSE Linux Enterprise Server 12 SP2 ESPOS 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 ESPOS xen Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP4 ESPOS xen Not affected
SUSE Linux Enterprise Server 12 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP5 xen Not affected
SUSE Linux Enterprise Server 15 ESPOS xen Not affected
SUSE Linux Enterprise Server 15 LTSS xen Not affected
SUSE Linux Enterprise Server 15 SP1 xen Not affected
SUSE Linux Enterprise Server 15 SP2 xen Not affected
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 Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 xen Not affected
SUSE Linux Enterprise Storage 6 xen Not affected
SUSE Linux Enterprise Storage 7 xen Not affected
SUSE Manager Proxy 4.0 xen Not affected
SUSE Manager Proxy 4.1 xen Not affected
SUSE Manager Retail Branch Server 4.0 xen Not affected
SUSE Manager Retail Branch Server 4.1 xen Not affected
SUSE Manager Server 4.0 xen Not affected
SUSE Manager Server 4.1 xen Not affected
SUSE OpenStack Cloud 7 xen Not affected
SUSE OpenStack Cloud 8 xen Not affected
SUSE OpenStack Cloud 9 xen Not affected
SUSE OpenStack Cloud Crowbar 8 xen Not affected
SUSE OpenStack Cloud Crowbar 9 xen Not affected