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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "matchCriteriaId": "7494A471-EEFC-44F4-96B1-FDBA3B780313", "versionEndIncluding": "4.8.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1."}, {"lang": "es", "value": "La caracter\u00edstica de tabla grant en Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta un mapeo de GNTMAP_device_map y GNTMAP_host_map cuando este va seguido \u00fanicamente de una desasignaci\u00f3n (unmapping) de GNTMAP_host_map, lo que permite que los usuarios invitados del sistema operativo provoquen una denegaci\u00f3n de servicio (mala gesti\u00f3n del conteo y corrupci\u00f3n de memoria) u obtengan privilegios de acceso al sistema operativo anfitri\u00f3n. Esto tambi\u00e9n se conoce como XSA-224, fallo 1."}], "id": "CVE-2017-10920", "lastModified": "2019-10-03T00:03:26.223", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 10.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-07-05T01:29:00.830", "references": [{"source": "cve@mitre.org", "url": "http://www.debian.org/security/2017/dsa-3969"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1038734"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201708-03"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201710-17"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://xenbits.xen.org/xsa/advisory-224.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Jan Beulich (SUSE) as the original reporter.", "bugzilla": {"description": "xen: grant table operations mishandle reference counts (XSA-224)", "id": "1458878", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1458878"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "details": ["The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1."], "mitigation": {"lang": "en:us", "value": "Running only HVM guests will avoid this vulnerability."}, "name": "CVE-2017-10920", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-06-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-10920\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-10920\nhttp://xenbits.xen.org/xsa/advisory-224.html"], "threat_severity": "Important"}