CVE-2021-27379

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-04-11T11:06:19.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "http://xenbits.xen.org/xsa/advisory-366.html"}, {"tags": ["x_refsource_MISC"], "url": "https://xenbits.xen.org/xsa/advisory-366.html"}, {"name": "[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2021/02/23/1"}, {"name": "DSA-4888", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2021/dsa-4888"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-27379", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "http://xenbits.xen.org/xsa/advisory-366.html", "refsource": "CONFIRM", "url": "http://xenbits.xen.org/xsa/advisory-366.html"}, {"name": "https://xenbits.xen.org/xsa/advisory-366.html", "refsource": "MISC", "url": "https://xenbits.xen.org/xsa/advisory-366.html"}, {"name": "[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2021/02/23/1"}, {"name": "DSA-4888", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2021/dsa-4888"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:48:16.398Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://xenbits.xen.org/xsa/advisory-366.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://xenbits.xen.org/xsa/advisory-366.html"}, {"name": "[oss-security] 20210223 Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/02/23/1"}, {"name": "DSA-4888", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2021/dsa-4888"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-27379", "datePublished": "2021-02-18T15:05:25.000Z", "dateReserved": "2021-02-18T00:00:00.000Z", "dateUpdated": "2024-08-03T20:48:16.398Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*", "matchCriteriaId": "7156BE00-A98A-4395-9E5E-945B2E0C9E6E", "versionEndExcluding": "4.12.0", "versionStartIncluding": "3.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Xen versiones hasta 4.11.x, permitiendo a usuarios del Sistema Operativo invitado x86 Intel HVM obtener acceso DMA de lectura y escritura no previsto y posiblemente causar una denegaci\u00f3n de servicio (bloqueo del Sistema Operativo host) o alcanzar privilegios. Esto ocurre porque un backport no se descarg\u00f3 y, por lo tanto, las actualizaciones de IOMMU no siempre fueron correctas. NOTA: este problema se presenta debido a una correcci\u00f3n incompleta para CVE-2020-15565"}], "id": "CVE-2021-27379", "lastModified": "2026-06-17T03:44:44.440", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 5.9, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 8.5, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "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": "2021-02-18T17:15:15.867", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/02/23/1"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "http://xenbits.xen.org/xsa/advisory-366.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4888"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-366.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/02/23/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "url": "http://xenbits.xen.org/xsa/advisory-366.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4888"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-366.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{}