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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.
| Reporter | Title | Published | Views | Family All 31 |
|---|---|---|---|---|
 | CVE-2019-20175 affecting package qemu-kvm 4.2.0-48 | 5 Nov 202004:21 | – | cbl_mariner |
 | CVE-2019-20175 | 18 Mar 202418:11 | – | circl |
 | QEMU 'ide_dma_cb()' function denial of service vulnerability | 6 Jan 202000:00 | – | cnvd |
 | CVE-2019-20175 | 31 Dec 201903:27 | – | cve |
 | CVE-2019-20175 | 31 Dec 201903:27 | – | cvelist |
 | CVE-2019-20175 | 31 Dec 201903:27 | – | debiancve |
 | EulerOS Virtualization for ARM 64 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1367) | 2 Apr 202000:00 | – | nessus |
| EulerOS Virtualization for ARM 64 3.0.2.0 : qemu-kvm (EulerOS-SA-2020-1573) | 1 May 202000:00 | – | nessus |
| EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790) | 1 Jul 202000:00 | – | nessus |
| EulerOS 2.0 SP8 : qemu (EulerOS-SA-2020-1880) | 28 Aug 202000:00 | – | nessus |
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18 Aug 2020 07:00Current
8.2High risk
Vulners AI Score8.2
CVSS 25
CVSS 3.17.5
EPSS0.00537
SSVC