What is the severity of CVE-2023-34328?

CVE-2023-34328 has been classified as having a high severity level due to its potential impact on system security.

How do I fix CVE-2023-34328?

To mitigate CVE-2023-34328, it is recommended to update to the latest version of Xen that addresses this vulnerability.

What versions of Xen are affected by CVE-2023-34328?

CVE-2023-34328 affects Xen versions between 4.5.0 and 4.14.0.

What types of systems are impacted by CVE-2023-34328?

CVE-2023-34328 impacts systems running Xen hypervisor that uses affected AMD CPU extensions.

What should I do if I can't immediately update for CVE-2023-34328?

If unable to update for CVE-2023-34328, consider implementing additional security measures to limit exposure.

Vulnerability/
CVE-2023-34328

medium

5.5

10/10/2023

5/1/2024

11/1/2024

CVE-2023-34328: x86/AMD: Debug Mask handling

First published: Tue Oct 10 2023(Updated: )

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

Credit: security@xen.org

Affected Software	Affected Version	How to fix
Xen xen-unstable	>=4.5.0<4.14.0

Remedy

https://xenbits.xenproject.org/xsa/advisory-444.html

Never miss a vulnerability like this again

Reference Links

https://xenbits.xenproject.org/xsa/advisory-444.html

Frequently Asked Questions

What is the severity of CVE-2023-34328?
CVE-2023-34328 has been classified as having a high severity level due to its potential impact on system security.
How do I fix CVE-2023-34328?
To mitigate CVE-2023-34328, it is recommended to update to the latest version of Xen that addresses this vulnerability.
What versions of Xen are affected by CVE-2023-34328?
CVE-2023-34328 affects Xen versions between 4.5.0 and 4.14.0.
What types of systems are impacted by CVE-2023-34328?
CVE-2023-34328 impacts systems running Xen hypervisor that uses affected AMD CPU extensions.
What should I do if I can't immediately update for CVE-2023-34328?
If unable to update for CVE-2023-34328, consider implementing additional security measures to limit exposure.

collector/oss-sec
alias/CVE-2023-34327
alias/CVE-2023-34328
agent/type
agent/first-publish-date
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/event
agent/remedy
agent/severity
agent/title
agent/author
agent/references
agent/softwarecombine
agent/description
agent/trending
agent/source
agent/tags
collector/nvd-api
source/NVD
agent/software-canonical-lookup
agent/software-canonical-lookup-request
vendor/xen
canonical/xen xen-unstable
version/xen xen-unstable/4.5.0

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