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VULNERABILITIES

CVE-2019-20175 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html CVEExploitMailing ListThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html CVEMailing ListThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html CVEThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html CVEMailing ListPatchThird Party Advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html CVE

see all 10 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-754Improper Check for Unusual or Exceptional Conditions[email protected]

Affected Products

ProductVersions
qemu qemu
>= 2.4.0, <= 4.2.0

CPE

  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

11 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2019-20175
NVD Published Date:
Dec 31, 2019
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2019-20175 Details - Not Deferred