CVE-2020-11743

{"id": "CVE-2020-11743", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "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": "2020-04-14T13:15:12.970", "references": [{"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html", "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2020/04/14/3", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://xenbits.xen.org/xsa/advisory-316.html", "tags": ["Exploit", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/", "source": "cve@mitre.org"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/", "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/202005-08", "source": "cve@mitre.org"}, {"url": "https://www.debian.org/security/2020/dsa-4723", "source": "cve@mitre.org"}, {"url": "https://xenbits.xen.org/xsa/advisory-316.html", "tags": ["Exploit", "Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-755"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Xen versiones hasta 4.13.x, permitiendo a usuarios invitados del Sistema Operativo causar una denegaci\u00f3n de servicio debido a una ruta de error incorrecta en GNTTABOP_map_grant. Es esperado que las operaciones de la tabla de concesiones devuelvan 0 para el \u00e9xito y un n\u00famero negativo para los errores. Algunos corchetes mal colocados causan que una ruta de error devuelva 1 en lugar de un valor negativo. El c\u00f3digo de la tabla de concesi\u00f3n en Linux trata esta condici\u00f3n como exitosa y contin\u00faa incorrectamente con un estado inicializado. Un invitado con errores o malicioso puede construir su tabla de concesi\u00f3n de tal manera que, cuando un dominio del backend intente asignar una concesi\u00f3n, llegue a la ruta de error incorrecta. Esto bloquear\u00e1 un dom0 o un dominio del backend basado en Linux."}], "lastModified": "2023-11-07T03:15:05.153", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BD625DD-3C5E-4849-88A6-464AA7AC6F88", "versionEndIncluding": "4.13.0"}, {"criteria": "cpe:2.3:o:xen:xen:4.13.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5BEB8A75-3CF5-4DA3-9159-16675A47D842"}, {"criteria": "cpe:2.3:o:xen:xen:4.13.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DAC2A87A-73F2-4D40-8EDB-8373B938FC11"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}