CVE-2019-20175: 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…

PriorityP339high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

3.36%

87.4th percentile

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	qemu	< qemu 1:5.0-1 (bookworm)	qemu 1:5.0-1 (bookworm)
msrc	cbl_mariner_1.0_arm	—	—
msrc	cbl_mariner_1.0_x64	—	—
msrc	cm1_qemu-kvm_4.2.0-13_on_cbl_mariner_1.0	—	—
qemu	qemu	>= 0 < 1:5.0-1	1:5.0-1
qemu	qemu	>= 0 < 1:5.0-1	1:5.0-1
qemu	qemu	>= 0 < 1:5.0-1	1:5.0-1
qemu	qemu	>= 0 < 1:5.0-1	1:5.0-1
qemu	qemu	2.4.0 – 4.2.0	—

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

osv7.5HIGH

vendor_debian7.5LOW

vendor_msrc7.5HIGH

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