Upstream information

CVE-2019-18423 at MITRE

Description

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEM_add_to_physmap hypercall. p2m->max_mapped_gfn is used by the functions p2m_resolve_translation_fault() and p2m_get_entry() to sanity check guest physical frame. The rest of the code in the two functions will assume that there is a valid root table and check that with BUG_ON(). The function p2m_get_root_pointer() will ignore the unused top bits of a guest physical frame. This means that the function p2m_set_entry() will alias the frame. However, p2m->max_mapped_gfn will be updated using the original frame. It would be possible to set p2m->max_mapped_gfn high enough to cover a frame that would lead p2m_get_root_pointer() to return NULL in p2m_get_entry() and p2m_resolve_translation_fault(). Additionally, the sanity check on p2m->max_mapped_gfn is off-by-one allowing "highest mapped + 1" to be considered valid. However, p2m_get_root_pointer() will return NULL. The problem could be triggered with a specially crafted hypercall XENMEM_add_to_physmap{, _batch} followed by an access to an address (via hypercall or direct access) that passes the sanity check but cause p2m_get_root_pointer() to return NULL. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). Xen version 4.8 and newer are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.

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 8.5
Vector AV:N/AC:M/Au:S/C:C/I:C/A:C
Access Vector Network
Access Complexity Medium
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 8.8
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 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: 1154460 [RESOLVED / INVALID]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
HPE Helion OpenStack 8
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
HPE-Helion-OpenStack-8-2019-3297
Image SLES12-SP4-EC2-HVM-BYOS
Image SLES12-SP4-SAP-EC2-HVM
Image SLES12-SP4-SAP-EC2-HVM-BYOS
  • xen-libs >= 4.11.3_02-2.20.1
  • xen-tools-domU >= 4.11.3_02-2.20.1
Image SLES15-EC2-CHOST-HVM-BYOS
Image SLES15-EC2-HVM-BYOS
Image SLES15-SAP-EC2-HVM
Image SLES15-SAP-EC2-HVM-BYOS
  • xen-libs >= 4.10.4_08-3.28.1
  • xen-tools-domU >= 4.10.4_08-3.28.1
Image SLES15-SP1-CAP-Deployment-BYOS-EC2-HVM
Image SLES15-SP1-CHOST-BYOS-EC2
Image SLES15-SP1-EC2-HPC-HVM-BYOS
Image SLES15-SP1-EC2-HVM-BYOS
Image SLES15-SP1-Manager-4-0-EC2-HVM-BYOS-Proxy
Image SLES15-SP1-Manager-4-0-EC2-HVM-BYOS-Server
Image SLES15-SP1-SAP-EC2-HVM
Image SLES15-SP1-SAP-EC2-HVM-BYOS
Image SLES15-SP1-SAPCAL-EC2-HVM
  • xen-libs >= 4.12.1_04-3.6.1
  • xen-tools-domU >= 4.12.1_04-3.6.1
SUSE CaaS Platform 3.0
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-CAASP-3.0-2019-3297
SUSE Enterprise Storage 5
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-Storage-5-2019-3297
SUSE Enterprise Storage 6
SUSE Linux Enterprise High Performance Computing 15 SP1
SUSE Linux Enterprise Server 15 SP1
SUSE Linux Enterprise Server for SAP Applications 15 SP1
SUSE Manager Proxy 4.0
SUSE Manager Retail Branch Server 4.0
SUSE Manager Server 4.0
  • xen >= 4.12.1_04-3.6.1
  • xen-devel >= 4.12.1_04-3.6.1
  • xen-libs >= 4.12.1_04-3.6.1
  • xen-tools >= 4.12.1_04-3.6.1
  • xen-tools-domU >= 4.12.1_04-3.6.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2019-2961
SUSE-SLE-Module-Server-Applications-15-SP1-2019-2961
SUSE Linux Enterprise Desktop 12 SP4
  • xen >= 4.11.3_02-2.20.1
  • xen-devel >= 4.11.3_02-2.20.1
  • xen-libs >= 4.11.3_02-2.20.1
  • xen-libs-32bit >= 4.11.3_02-2.20.1
 Patchnames:
SUSE-SLE-DESKTOP-12-SP4-2019-3310
SUSE-SLE-SDK-12-SP4-2019-3310
SUSE Linux Enterprise Desktop 15 SP1
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • xen-libs >= 4.12.1_04-3.6.1
  • xen-tools-domU >= 4.12.1_04-3.6.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2019-2961
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Module for Basesystem 15
  • xen-libs >= 4.10.4_08-3.28.1
  • xen-tools-domU >= 4.10.4_08-3.28.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-2019-3309
SUSE Linux Enterprise High Performance Computing 12 SP5
  • xen >= 4.12.1_06-1.1
  • xen-doc-html >= 4.12.1_06-1.1
  • xen-libs >= 4.12.1_06-1.1
  • xen-libs-32bit >= 4.12.1_06-1.1
  • xen-tools >= 4.12.1_06-1.1
  • xen-tools-domU >= 4.12.1_06-1.1
 Patchnames:
SUSE Linux Enterprise High Performance Computing 12 SP5 GA xen-4.12.1_06-1.1
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
  • xen >= 4.10.4_08-3.28.1
  • xen-devel >= 4.10.4_08-3.28.1
  • xen-libs >= 4.10.4_08-3.28.1
  • xen-tools >= 4.10.4_08-3.28.1
  • xen-tools-domU >= 4.10.4_08-3.28.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-2019-3309
SUSE-SLE-Module-Server-Applications-15-2019-3309
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • xen >= 4.12.1_04-3.6.1
  • xen-devel >= 4.12.1_04-3.6.1
  • xen-tools >= 4.12.1_04-3.6.1
 Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP1-2019-2961
SUSE Linux Enterprise Module for Server Applications 15
  • xen >= 4.10.4_08-3.28.1
  • xen-devel >= 4.10.4_08-3.28.1
  • xen-tools >= 4.10.4_08-3.28.1
 Patchnames:
SUSE-SLE-Module-Server-Applications-15-2019-3309
SUSE Linux Enterprise Server 12 SP3-BCL
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-SLE-SERVER-12-SP3-BCL-2019-3297
SUSE Linux Enterprise Server 12 SP3-ESPOS
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-SLE-SERVER-12-SP3-ESPOS-2019-3297
SUSE Linux Enterprise Server 12 SP3-LTSS
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-SLE-SERVER-12-SP3-2019-3297
SUSE Linux Enterprise Server 12 SP4
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • xen >= 4.11.3_02-2.20.1
  • xen-devel >= 4.11.3_02-2.20.1
  • xen-doc-html >= 4.11.3_02-2.20.1
  • xen-libs >= 4.11.3_02-2.20.1
  • xen-libs-32bit >= 4.11.3_02-2.20.1
  • xen-tools >= 4.11.3_02-2.20.1
  • xen-tools-domU >= 4.11.3_02-2.20.1
 Patchnames:
SUSE-SLE-SDK-12-SP4-2019-3310
SUSE-SLE-SERVER-12-SP4-2019-3310
SUSE Linux Enterprise Server 12 SP5
  • xen >= 4.12.1_06-1.1
  • xen-devel >= 4.12.1_06-1.1
  • xen-doc-html >= 4.12.1_06-1.1
  • xen-libs >= 4.12.1_06-1.1
  • xen-libs-32bit >= 4.12.1_06-1.1
  • xen-tools >= 4.12.1_06-1.1
  • xen-tools-domU >= 4.12.1_06-1.1
 Patchnames:
SUSE Linux Enterprise Server 12 SP5 GA xen-4.12.1_06-1.1
SUSE Linux Enterprise Software Development Kit 12 SP5 GA xen-devel-4.12.1_06-1.1
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-SLE-SAP-12-SP3-2019-3297
SUSE Linux Enterprise Server for SAP Applications 12 SP5
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen-devel >= 4.12.1_06-1.1
 Patchnames:
SUSE Linux Enterprise Software Development Kit 12 SP5 GA xen-devel-4.12.1_06-1.1
SUSE Linux Enterprise Software Development Kit 12 SP4
  • xen-devel >= 4.11.3_02-2.20.1
 Patchnames:
SUSE-SLE-SDK-12-SP4-2019-3310
SUSE OpenStack Cloud 8
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-OpenStack-Cloud-8-2019-3297
SUSE OpenStack Cloud Crowbar 8
  • xen >= 4.9.4_06-3.59.1
  • xen-doc-html >= 4.9.4_06-3.59.1
  • xen-libs >= 4.9.4_06-3.59.1
  • xen-libs-32bit >= 4.9.4_06-3.59.1
  • xen-tools >= 4.9.4_06-3.59.1
  • xen-tools-domU >= 4.9.4_06-3.59.1
 Patchnames:
SUSE-OpenStack-Cloud-Crowbar-8-2019-3297
openSUSE Leap 15.1
  • xen >= 4.12.1_04-lp151.2.6.1
  • xen-devel >= 4.12.1_04-lp151.2.6.1
  • xen-doc-html >= 4.12.1_04-lp151.2.6.1
  • xen-libs >= 4.12.1_04-lp151.2.6.1
  • xen-libs-32bit >= 4.12.1_04-lp151.2.6.1
  • xen-tools >= 4.12.1_04-lp151.2.6.1
  • xen-tools-domU >= 4.12.1_04-lp151.2.6.1
 Patchnames:
openSUSE-2019-2508

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 High Performance Computing 12 SP5 xen Released
SUSE Linux Enterprise Micro 5.1 xen Already fixed
SUSE Linux Enterprise Micro 5.2 xen Already fixed
SUSE Linux Enterprise Server 12 SP5 xen Released
SUSE Linux Enterprise Server 12 SP5-LTSS xen Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xen Released
SUSE Linux Enterprise Software Development Kit 12 SP5 xen Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP3 xen Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS xen Already fixed
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS xen Already fixed
SUSE Linux Enterprise Module for Basesystem 15 SP3 xen Already fixed
SUSE Linux Enterprise Module for Server Applications 15 SP3 xen Already fixed
SUSE Linux Enterprise Server 15 SP3 xen Already fixed
SUSE Linux Enterprise Server 15 SP3-LTSS xen Already fixed
SUSE Linux Enterprise Server 15-ESPOS xen Released
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 xen Released
SUSE Linux Enterprise Server for SAP Applications 15 SP3 xen Already fixed
Products past their end of life and not receiving proactive updates anymore.
HPE Helion OpenStack 8 xen Released
SUSE CaaS Platform 3.0 xen Released
SUSE CaaS Platform 4.0 xen Released
SUSE Container as a Service Platform 1.0 xen Released
SUSE Container as a Service Platform 2.0 xen Not affected
SUSE Enterprise Storage 5 xen Released
SUSE Enterprise Storage 6 xen Released
SUSE Enterprise Storage 7.1 xen Already fixed
SUSE Linux Enterprise Desktop 11 SP4 xen Not affected
SUSE Linux Enterprise Desktop 12 SP1 xen Not affected
SUSE Linux Enterprise Desktop 12 SP2 xen Not affected
SUSE Linux Enterprise Desktop 12 SP3 xen Affected
SUSE Linux Enterprise Desktop 12 SP4 xen Released
SUSE Linux Enterprise Desktop 15 xen Released
SUSE Linux Enterprise Desktop 15 SP1 xen Released
SUSE Linux Enterprise Desktop 15 SP3 xen Already fixed
SUSE Linux Enterprise High Performance Computing 12 SP4 xen Released
SUSE Linux Enterprise High Performance Computing 15 xen Released
SUSE Linux Enterprise High Performance Computing 15 SP1 xen Released
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS xen Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS xen Released
SUSE Linux Enterprise High Performance Computing 15-ESPOS xen Affected
SUSE Linux Enterprise High Performance Computing 15-LTSS xen Released
SUSE Linux Enterprise Module for Basesystem 15 xen Released
SUSE Linux Enterprise Module for Basesystem 15 SP1 xen Released
SUSE Linux Enterprise Module for Server Applications 15 xen Released
SUSE Linux Enterprise Module for Server Applications 15 SP1 xen Released
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT xen Not affected
SUSE Linux Enterprise Real Time 15 SP3 xen Already fixed
SUSE Linux Enterprise Server 11 SP4 xen Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS xen Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP1 xen Not affected
SUSE Linux Enterprise Server 12 SP1-LTSS xen Not affected
SUSE Linux Enterprise Server 12 SP2 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 xen Affected
SUSE Linux Enterprise Server 12 SP3-BCL xen Released
SUSE Linux Enterprise Server 12 SP3-ESPOS xen Released
SUSE Linux Enterprise Server 12 SP3-LTSS xen Released
SUSE Linux Enterprise Server 12 SP4 xen Released
SUSE Linux Enterprise Server 12 SP4-ESPOS xen Released
SUSE Linux Enterprise Server 12 SP4-LTSS xen Released
SUSE Linux Enterprise Server 15 xen Released
SUSE Linux Enterprise Server 15 SP1 xen Released
SUSE Linux Enterprise Server 15 SP1-BCL xen Affected
SUSE Linux Enterprise Server 15 SP1-LTSS xen Released
SUSE Linux Enterprise Server 15 SP3-BCL xen Already fixed
SUSE Linux Enterprise Server 15-LTSS xen Released
SUSE Linux Enterprise Server for SAP Applications 11 SP4 xen Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP1 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 Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 xen Released
SUSE Linux Enterprise Server for SAP Applications 15 xen Released
SUSE Linux Enterprise Server for SAP Applications 15 SP1 xen Released
SUSE Linux Enterprise Software Development Kit 11 SP4 xen Not affected
SUSE Linux Enterprise Software Development Kit 12 SP1 xen Not affected
SUSE Linux Enterprise Software Development Kit 12 SP2 xen Not affected
SUSE Linux Enterprise Software Development Kit 12 SP3 xen Affected
SUSE Linux Enterprise Software Development Kit 12 SP4 xen Released
SUSE Manager Proxy 4.0 xen Released
SUSE Manager Proxy 4.2 xen Already fixed
SUSE Manager Retail Branch Server 4.0 xen Released
SUSE Manager Retail Branch Server 4.2 xen Already fixed
SUSE Manager Server 4.0 xen Released
SUSE Manager Server 4.2 xen Already fixed
SUSE OpenStack Cloud 7 xen Not affected
SUSE OpenStack Cloud 8 xen Released
SUSE OpenStack Cloud 9 xen Released
SUSE OpenStack Cloud Crowbar 8 xen Released
SUSE OpenStack Cloud Crowbar 9 xen Released
openSUSE Leap 15.3 xen Already fixed
openSUSE Leap Micro 5.2 xen Already fixed
Products at an unknown state of their lifecycle.
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security xen Affected

SUSE Timeline for this CVE

CVE page created: Fri Oct 18 13:24:42 2019
CVE page last modified: Tue Oct 8 18:25:16 2024