Permissions, Privileges, and Access Controls in Xen - CVE-2023-34326

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Main Vulnerability Database Vulnerabilities #VU81883

Permissions, Privileges, and Access Controls in Xen - CVE-2023-34326

Published: October 11, 2023


Vulnerability identifier: #VU81883
CSH Severity: Medium
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-34326
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote guest to escalate privileges on the system.

The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can access memory not owned by the guest and escalate privileges on the system.


Affected software

Xen
Citrix Hypervisor
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE CaaS Platform
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
openSUSE Leap Micro
SUSE Enterprise Storage
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS
SUSE Linux Enterprise Server 15 SP1 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
Server Applications Module
Basesystem Module
openSUSE Leap
Fedora
ObjectScale
xen-libs-32bit
xen-tools-domU
xen-tools
xen-doc-html
xen-libs-debuginfo-32bit
xen-tools-debuginfo
xen-tools-domU-debuginfo
xen
xen-libs
xen-libs-debuginfo
xen-debugsource
xen-devel
xen-tools-xendomains-wait-disk
xen-libs-64bit-debuginfo
xen-libs-64bit
xen-libs-32bit-debuginfo

How to mitigate CVE-2023-34326

Install updates from vendor's website.

ObjectScale - update to 1.4.0
xen-libs-32bit - addressed in versions 4.12.4_40-3.97.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-tools-domU - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-tools - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-doc-html - addressed in versions 4.12.4_40-3.97.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs-debuginfo-32bit - update to 4.12.4_40-3.97.1
xen-tools-debuginfo - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-tools-domU-debuginfo - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs-debuginfo - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-debugsource - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-devel - addressed in versions 4.12.4_40-3.97.1, 4.12.4_40-150100.3.95.1, 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-tools-xendomains-wait-disk - addressed in versions 4.13.5_06-150200.3.80.1, 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs-64bit-debuginfo - addressed in versions 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs-64bit - addressed in versions 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen-libs-32bit-debuginfo - addressed in versions 4.14.6_06-150300.3.57.1, 4.16.5_06-150400.4.37.1, 4.16.5_08-150400.4.40.1, 4.17.2_06-150500.3.12.1, 4.17.2_08-150500.3.15.1
xen - addressed in versions 4.16.5-3.fc37, 4.17.2-4.fc38, 4.17.2-4.fc39

External References

Related Security Bulletins