CVE-2023-34328

{"id": "CVE-2023-34328", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-01-05T17:15:08.730", "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-444.html", "tags": ["Patch", "Vendor Advisory"], "source": "security@xen.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "\n[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nAMD CPUs since ~2014 have extensions to normal x86 debugging functionality.\nXen supports guests using these extensions.\n\nUnfortunately there are errors in Xen's handling of the guest state, leading\nto denials of service.\n\n 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of\n a previous vCPUs debug mask state.\n\n 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT.\n This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock\n up the CPU entirely.\n"}, {"lang": "es", "value": "[Este registro de informaci\u00f3n de la CNA se relaciona con m\u00faltiples CVE; el texto explica qu\u00e9 aspectos/vulnerabilidades corresponden a cada CVE.] Las CPU AMD desde ~2014 tienen extensiones a la funcionalidad de depuraci\u00f3n x86 normal. Xen admite invitados que utilizan estas extensiones. Desafortunadamente, hay errores en el manejo del estado invitado por parte de Xen, lo que lleva a denegaciones de servicio. 1) CVE-2023-34327: una vCPU HVM puede terminar funcionando en el contexto de un estado de m\u00e1scara de depuraci\u00f3n de vCPU anterior. 2) CVE-2023-34328: una vCPU PV puede colocar un punto de interrupci\u00f3n sobre la GDT en vivo. Esto permite que PV vCPU aproveche XSA-156/CVE-2015-8104 y bloquee la CPU por completo."}], "lastModified": "2024-01-11T15:56:17.957", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "853DC15E-4B7F-40A1-8932-7FE496D93D82", "versionEndExcluding": "4.14.0", "versionStartIncluding": "4.5.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@xen.org"}