CVE-2019-20175

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NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert."}, {"lang": "es", "value": "** EN DISPUTA ** Se descubri\u00f3 un problema en la funci\u00f3n ide_dma_cb() en el archivo hw/ide/core.c en QEMU versiones 2.4.0 hasta la versi\u00f3n 4.2.0. El sistema invitado puede bloquear el proceso de QEMU en el sistema host por medio de un SCSI_IOCTL_SEND_COMMAND especial. Llega a una afirmaci\u00f3n que implica que el tama\u00f1o de las transferencias DMA con \u00e9xito debe ser un m\u00faltiplo de 512 (el tama\u00f1o de un sector). NOTA: un miembro del equipo de seguridad de QEMU cuestiona la relevancia de este problema ya que un \"usuario invitado privilegiado cuenta con muchas formas de causar un efecto de DoS similar, sin activar esta afirmaci\u00f3n\"."}], "id": "CVE-2019-20175", "lastModified": "2026-06-17T02:30:09.773", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2019-20175", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-26T19:35:51.638983Z", "version": "2.0.3"}}]}, "published": "2019-12-31T04:15:10.503", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html"}, {"source": "cve@mitre.org", "url": "https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-754"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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