Permissions, Privileges, and Access Controls in Xen - CVE-2023-46839

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Main Vulnerability Database Vulnerabilities #VU85929

Permissions, Privileges, and Access Controls in Xen - CVE-2023-46839

Published: January 31, 2024


Vulnerability identifier: #VU85929
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2023-46839
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a malicious guest to gain access to sensitive information.

The vulnerability exists due to an error in phantom functions implementation for PCI devices. Under certain circumstances a malicious guest assigned a PCI device with phantom functions may be able to access memory from a previous owner of the device.


Affected software

Xen
Gentoo Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Desktop 15
SUSE CaaS Platform
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
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 High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
Server Applications Module
Basesystem Module
openSUSE Leap
Fedora
PowerStore X
PowerStore T
xen-debugsource
xen-devel
xen-libs-32bit
xen-tools
xen-doc-html
xen-libs-debuginfo
xen
xen-tools-debuginfo
xen-libs
xen-tools-domU-debuginfo
xen-tools-domU
xen-libs-debuginfo-32bit
xen-tools-xendomains-wait-disk
xen-libs-32bit-debuginfo
xen-libs-64bit-debuginfo
xen-libs-64bit
app-emulation/xen

How to mitigate CVE-2023-46839

Install updates from vendor's website.

PowerStore X - update to 3.2.1.4-2386214
PowerStore T - update to 4.0.0.2-2365061
xen-debugsource - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-devel - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-32bit - addressed in versions 4.12.4_44-3.103.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-tools - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-doc-html - addressed in versions 4.12.4_44-3.103.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-debuginfo - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-tools-debuginfo - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-tools-domU-debuginfo - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-tools-domU - addressed in versions 4.12.4_44-3.103.1, 4.12.4_44-150100.3.101.1, 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-debuginfo-32bit - update to 4.12.4_44-3.103.1
xen-tools-xendomains-wait-disk - addressed in versions 4.13.5_10-150200.3.86.1, 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-32bit-debuginfo - addressed in versions 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-64bit-debuginfo - addressed in versions 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen-libs-64bit - addressed in versions 4.14.6_10-150300.3.63.1, 4.16.5_12-150400.4.46.1, 4.17.3_04-150500.3.21.1
xen - addressed in versions 4.17.2-6.fc38, 4.17.2-6.fc39
app-emulation/xen - update to 4.17.4

External References

Related Security Bulletins