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 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.

CVSS v3.1

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

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

3.36% chance of exploitation in the next 30 days, 88th percentile

Published

2019-12-31

Updated

2024-08-05

Proof-of-concept exploits (1)

• https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html

References

• CVE Record
• NVD entry

Related

• CVE-2019-20174
• CVE-2019-20176
• CVE-2019-20171
• CVE-2019-20183
• CVE-2019-20170
• CVE-2019-20197