{"containers": {"cna": {"affected": [{"product": "xen", "vendor": "Xen", "versions": [{"lessThan": "4.12", "status": "unknown", "version": "unspecified", "versionType": "custom"}, {"lessThan": "unspecified", "status": "affected", "version": "4.12.x", "versionType": "custom"}, {"lessThan": "unspecified", "status": "unaffected", "version": "next of xen-unstable", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, \"RMRR\"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption."}], "metrics": [{"other": {"content": {"description": {"description_data": [{"lang": "eng", "value": "Administrators of guests which have been assigned RMRR-using PCI\ndevices can cause denial of service and other problems, possibly\nincluding escalation of privilege."}]}}, "type": "unknown"}}], "problemTypes": [{"descriptions": [{"description": "unknown", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-08-14T20:09:49", "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "shortName": "XEN"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://xenbits.xenproject.org/xsa/advisory-386.txt"}, {"name": "[oss-security] 20211007 Xen Security Advisory 386 v2 (CVE-2021-28702) - PCI devices with RMRRs not deassigned correctly", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2021/10/07/2"}, {"name": "FEDORA-2021-80bbe7def0", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/"}, {"name": "FEDORA-2021-0b7a484688", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/"}, {"name": "FEDORA-2021-829f5f2f43", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/"}, {"name": "DSA-5017", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"name": "GLSA-202208-23", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/202208-23"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@xen.org", "ID": "CVE-2021-28702", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "xen", "version": {"version_data": [{"version_affected": "?<", "version_value": "4.12"}, {"version_affected": ">=", "version_value": "4.12.x"}, {"version_affected": "!>", "version_value": "xen-unstable"}]}}]}, "vendor_name": "Xen"}]}}, "configuration": {"configuration_data": {"description": {"description_data": [{"lang": "eng", "value": "All versions of Xen from at least 4.4 onwards are vulnerable.\n\nOnly Intel x86 systems are affected. AMD x86 systems, and Arm\nsystems, are all unaffected.\n\nOnly systems using PCI passthrough are affected. (And then, only if\nthe assigned devices have RMRRs, but whether a device advertises RMRRs\nis not easy to discern.)"}]}}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, \"RMRR\"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption."}]}, "impact": {"impact_data": {"description": {"description_data": [{"lang": "eng", "value": "Administrators of guests which have been assigned RMRR-using PCI\ndevices can cause denial of service and other problems, possibly\nincluding escalation of privilege."}]}}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "unknown"}]}]}, "references": {"reference_data": [{"name": "https://xenbits.xenproject.org/xsa/advisory-386.txt", "refsource": "MISC", "url": "https://xenbits.xenproject.org/xsa/advisory-386.txt"}, {"name": "[oss-security] 20211007 Xen Security Advisory 386 v2 (CVE-2021-28702) - PCI devices with RMRRs not deassigned correctly", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2021/10/07/2"}, {"name": "FEDORA-2021-80bbe7def0", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/"}, {"name": "FEDORA-2021-0b7a484688", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/"}, {"name": "FEDORA-2021-829f5f2f43", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/"}, {"name": "DSA-5017", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2021/dsa-5017"}, {"name": "GLSA-202208-23", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/202208-23"}]}, "workaround": {"workaround_data": {"description": {"description_data": [{"lang": "eng", "value": "There is no mitigation (other than not passing through PCI devices\nwith RMRRs to guests)."}]}}}}}}, "cveMetadata": {"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f", "assignerShortName": "XEN", "cveId": "CVE-2021-28702", "datePublished": "2021-10-06T13:13:21", "dateReserved": "2021-03-18T00:00:00", "dateUpdated": "2022-08-14T20:09:49", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.0"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "63151C05-ED35-4063-A57D-325798B0A9E8", "versionEndIncluding": "4.15.1", "versionStartIncluding": "4.13.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, \"RMRR\"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption."}, {"lang": "es", "value": "Unos Dispositivos PCI con RMRRs no desasignados correctamente Determinados dispositivos PCI de un sistema pueden tener asignadas Regiones de Memoria Reservada (especificadas por medio de Informes de Regiones de Memoria Reservada, \"RMRR\"). Normalmente son usados para tareas de plataforma como la emulaci\u00f3n USB heredada. Si un dispositivo de este tipo se pasa a un hu\u00e9sped, entonces al apagar el hu\u00e9sped el dispositivo no se desasigna correctamente. La configuraci\u00f3n de IOMMU para estos dispositivos que no son desasignados correctamente termina apuntando a una estructura de datos liberada, incluyendo las Tablas de P\u00e1gina IO. Las subsiguientes DMA o interrupciones del dispositivo tendr\u00e1n un comportamiento impredecible, que va desde fallos de IOMMU hasta corrupci\u00f3n de memoria"}], "id": "CVE-2021-28702", "lastModified": "2023-11-07T03:32:19.983", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "PHYSICAL", "availabilityImpact": "HIGH", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-06T14:15:07.230", "references": [{"source": "security@xen.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/10/07/2"}, {"source": "security@xen.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OIHEJ3R3EH5DYI2I5UMD2ULJ2ELA3EX/"}, {"source": "security@xen.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FDPRMOBBLS74ONYP3IXZZXSTLKR7GRQB/"}, {"source": "security@xen.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAWV6PO2KUGVZTESERECOBUBZ6X45I7/"}, {"source": "security@xen.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202208-23"}, {"source": "security@xen.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-5017"}, {"source": "security@xen.org", "tags": ["Vendor Advisory"], "url": "https://xenbits.xenproject.org/xsa/advisory-386.txt"}], "sourceIdentifier": "security@xen.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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