{ "id": "CVE-2021-20257", "sourceIdentifier": "secalert@redhat.com", "published": "2022-03-16T15:15:09.983", "lastModified": "2023-02-12T22:15:17.573", "vulnStatus": "Modified", "descriptions": [ { "lang": "en", "value": "An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles 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 bucle infinito en el emulador NIC e1000 de QEMU. Este problema se produce mientras son procesados descriptores de transmisi\u00f3n (tx) en la funci\u00f3n process_tx_desc si varios campos del descriptor son inicializados con valores no v\u00e1lidos. Este fallo permite a un hu\u00e9sped consumir ciclos de CPU 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:L/UI:N/S:C/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 2.0, "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, 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"url": "https://security.netapp.com/advisory/ntap-20220425-0003/", "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ] }, { "url": "https://www.openwall.com/lists/oss-security/2021/02/25/2", "source": "secalert@redhat.com", "tags": [ "Mailing List", "Patch", "Third Party Advisory" ] } ] }