x86/AMD: Debug Mask handling (Xen Xen)
En bref
- Source
- NVD
- EPSS
- EPSS 0.24 % · centile 16 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- XEN
- Statut NVD
- Modified
Description
[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.
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2023-38408
- GCVE · GCVE-0-2023-34327
Avis du CERT-FR
- CERTFR-2023-AVI-0834 — Multiples vulnérabilités dans Xen · cert.ssi.gouv.fr
- CERTFR-2023-AVI-0823 — Multiples vulnérabilités dans les produits Citrix · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*≥ 4.5.0
Produits affectés
| Produit | Versions |
|---|---|
| Xen · Xen | unknown consult Xen advisory XSA-444 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |