{ "id": "CVE-2020-35503", "sourceIdentifier": "secalert@redhat.com", "published": "2021-06-02T14:15:07.877", "lastModified": "2022-05-13T17:28:30.917", "vulnStatus": "Analyzed", "descriptions": [ { "lang": "en", "value": "A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability." }, { "lang": "es", "value": "Se ha encontrado un fallo de desreferencia del puntero NULL en la emulaci\u00f3n megasas-gen2 SCSI host bus adapter de QEMU en versiones anteriores a 6.0 incluy\u00e9ndola. Este problema ocurre en la funci\u00f3n callback megasas_command_cancelled() mientras se deja caer una petici\u00f3n SCSI. Este fallo permite a un usuario invitado con privilegios bloquear el proceso QEMU en el host, resultando en una denegaci\u00f3n de servicio. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema" } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.0, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 1.5, "impactScore": 4.0 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1 }, "baseSeverity": "LOW", "exploitabilityScore": 3.9, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "secalert@redhat.com", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-476" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*", "versionEndIncluding": "6.0.0", "matchCriteriaId": "B002BA5C-F99C-460E-A53C-F61A813DD689" } ] } ] }, { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194" } ] } ] } ], "references": [ { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1910346", "source": "secalert@redhat.com", "tags": [ "Issue Tracking", "Third Party Advisory" ] }, { "url": "https://security.netapp.com/advisory/ntap-20210720-0008/", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] } ] }