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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-12-31T03:27:40

Updated: 2024-08-05T02:39:09.821Z

Reserved: 2019-12-31T00:00:00

Link: CVE-2019-20175

cve-icon Vulnrichment

Updated: 2024-08-05T02:39:09.821Z

cve-icon NVD

Status : Modified

Published: 2019-12-31T04:15:10.503

Modified: 2024-11-21T04:38:09.763

Link: CVE-2019-20175

cve-icon Redhat

No data.