{"api_version":"1","generated_at":"2026-04-23T08:13:14+00:00","cve":"CVE-2019-20175","urls":{"html":"https://cve.report/CVE-2019-20175","api":"https://cve.report/api/cve/CVE-2019-20175.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-20175","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-20175"},"summary":{"title":"CVE-2019-20175","description":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). 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.\"","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2019-12-31 04:15:00","updated_at":"2023-11-07 03:08:00"},"problem_types":["CWE-754"],"metrics":[],"references":[{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html","refsource":"MISC","tags":["Exploit","Mailing List","Third Party Advisory"],"title":"[Qemu-devel] [QEMU-SECURITY] ide: fix assertion in ide_dma_cb() to preve","mime":"text/x-c","httpstatus":"200","archivestatus":"0"},{"url":"https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html","name":"https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html","refsource":"","tags":[],"title":"[PATCH v3 0/2] ide: Fix incorrect handling of some PRDTs and add the corresponding unit-test","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html","refsource":"MISC","tags":["Mailing List","Patch","Third Party Advisory"],"title":"[PATCH v2 1/1] ide: check DMA transfer size in ide_dma_cb() to prevent q","mime":"text/x-c","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html","refsource":"MISC","tags":["Mailing List","Third Party Advisory"],"title":"Re: [Qemu-devel] [Qemu-block] [QEMU-SECURITY] ide: fix assertion in ide_","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html","refsource":"MISC","tags":["Third Party Advisory"],"title":"Re: [QEMU-SECURITY] ide: fix assertion in ide_dma_cb() to prevent qemu D","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html","name":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"[PATCH v3 0/2] ide: Fix incorrect handling of some PRDTs and add the corresponding unit-test","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-20175","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-20175","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2019","cve_id":"20175","vulnerable":"1","versionEndIncluding":"4.2.0","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"qemu","cpe5":"qemu","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2019-20175","qid":"900050","title":"CBL-Mariner Linux Security Update for qemu-kvm 4.2.0"},{"cve":"CVE-2019-20175","qid":"903059","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (1967)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2019-20175","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). 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.\""}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html","refsource":"MISC","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html","refsource":"MISC","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html","refsource":"MISC","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html"},{"url":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html","refsource":"MISC","name":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html"},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html","refsource":"MISC","name":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html"}]}},"nvd":{"publishedDate":"2019-12-31 04:15:00","lastModifiedDate":"2023-11-07 03:08:00","problem_types":["CWE-754"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*","versionStartIncluding":"2.4.0","versionEndIncluding":"4.2.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"20175","Ordinal":"165190","Title":"CVE-2019-20175","CVE":"CVE-2019-20175","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"20175","Ordinal":"1","NoteData":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). 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.\"","Type":"Description","Title":null},{"CveYear":"2019","CveId":"20175","Ordinal":"2","NoteData":"2019-12-30","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"20175","Ordinal":"3","NoteData":"2019-12-30","Type":"Other","Title":"Modified"}]}}}