{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"cveId": "CVE-2023-34326", "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "state": "PUBLISHED", "assignerShortName": "XEN", "dateReserved": "2023-06-01T10:44:17.065Z", "datePublished": "2024-01-05T16:30:57.225Z", "dateUpdated": "2024-01-05T16:30:57.225Z"}, "containers": {"cna": {"title": "x86/AMD: missing IOMMU TLB flushing", "datePublic": "2023-10-10T11:26:00Z", "descriptions": [{"lang": "en", "value": "The caching invalidation guidelines from the AMD-Vi specification (48882\u2014Rev\n3.07-PUB\u2014Oct 2022) is incorrect on some hardware, as devices will malfunction\n(see stale DMA mappings) if some fields of the DTE are updated but the IOMMU\nTLB is not flushed.\n\nSuch stale DMA mappings can point to memory ranges not owned by the guest, thus\nallowing access to unindented memory regions.\n"}], "impacts": [{"descriptions": [{"lang": "en", "value": "Privilege escalation, Denial of Service (DoS) affecting the entire host,\nand information leaks.\n"}]}], "affected": [{"defaultStatus": "unknown", "product": "Xen", "vendor": "Xen", "versions": [{"status": "unknown", "version": "consult Xen advisory XSA-442"}]}], "configurations": [{"lang": "en", "value": "All Xen versions supporting PCI passthrough are affected.\n\nOnly x86 AMD systems with IOMMU hardware are vulnerable.\n\nOnly x86 guests which have physical devices passed through to them can\nleverage the vulnerability.\n"}], "workarounds": [{"lang": "en", "value": "Not passing through physical devices to guests will avoid the vulnerability.\n"}], "credits": [{"lang": "en", "type": "finder", "value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer.\n"}], "references": [{"url": "https://xenbits.xenproject.org/xsa/advisory-442.html"}], "providerMetadata": {"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN", "dateUpdated": "2024-01-05T16:30:57.225Z"}}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "C2B9CCC2-BAC5-4A65-B8D4-4B71EBBA0C2F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "The caching invalidation guidelines from the AMD-Vi specification (48882\u2014Rev\n3.07-PUB\u2014Oct 2022) is incorrect on some hardware, as devices will malfunction\n(see stale DMA mappings) if some fields of the DTE are updated but the IOMMU\nTLB is not flushed.\n\nSuch stale DMA mappings can point to memory ranges not owned by the guest, thus\nallowing access to unindented memory regions.\n"}, {"lang": "es", "value": "Las pautas de invalidaci\u00f3n de almacenamiento en cach\u00e9 de la especificaci\u00f3n AMD-Vi (48882\u2014Rev 3.07-PUB\u2014octubre de 2022) son incorrectas en algunos hardware, ya que los dispositivos funcionar\u00e1n mal (consulte las asignaciones de DMA obsoletas) si algunos campos del DTE se actualizan pero el IOMMU TLB no est\u00e1 eliminado. Estas asignaciones de DMA obsoletas pueden apuntar a rangos de memoria que no pertenecen al hu\u00e9sped, lo que permite el acceso a regiones de memoria sin sangr\u00eda."}], "id": "CVE-2023-34326", "lastModified": "2024-01-11T15:57:03.720", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-01-05T17:15:08.637", "references": [{"source": "security@xen.org", "tags": ["Vendor Advisory"], "url": "https://xenbits.xenproject.org/xsa/advisory-442.html"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}