CVE-2023-34327

[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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://xenbits.xenproject.org/xsa/advisory-444.html	Patch Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-444.html	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

History

21 Nov 2024, 08:07

Type	Values Removed	Values Added
References	~~() https://xenbits.xenproject.org/xsa/advisory-444.html - Patch, Vendor Advisory~~	() https://xenbits.xenproject.org/xsa/advisory-444.html - Patch, Vendor Advisory

11 Jan 2024, 15:56

Type	Values Removed	Values Added
References	~~() https://xenbits.xenproject.org/xsa/advisory-444.html -~~	() https://xenbits.xenproject.org/xsa/advisory-444.html - Patch, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CPE		cpe:2.3:o:xen:xen::::::::
CWE		NVD-CWE-noinfo
First Time		Xen Xen xen

05 Jan 2024, 18:23

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-01-05 17:15

Updated : 2024-11-21 08:07

NVD link : CVE-2023-34327

Mitre link : CVE-2023-34327

CVE.ORG link : CVE-2023-34327

JSON object : View

Products Affected

xen

xen

CWE

NVD-CWE-noinfo

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