CVE-2019-20175

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

** DISPUTED ** 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."

References

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

https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html

https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html

https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html

https://www.mail-archive.com/[email protected]/msg667396.html

Details

Source: MITRE

Published: 2019-12-31

Updated: 2020-01-15

Type: CWE-754

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions from 2.4.0 to 4.2.0 (inclusive)

Tenable Plugins

View all (7 total)

IDNameProductFamilySeverity
147700EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2021-1667)NessusHuawei Local Security Checks
medium
147523EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2021-1632)NessusHuawei Local Security Checks
medium
144829EulerOS Virtualization 3.0.2.6 : qemu (EulerOS-SA-2021-1057)NessusHuawei Local Security Checks
critical
139983EulerOS 2.0 SP8 : qemu (EulerOS-SA-2020-1880)NessusHuawei Local Security Checks
high
138009EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790)NessusHuawei Local Security Checks
critical
136276EulerOS Virtualization for ARM 64 3.0.2.0 : qemu-kvm (EulerOS-SA-2020-1573)NessusHuawei Local Security Checks
critical
135154EulerOS Virtualization for ARM 64 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1367)NessusHuawei Local Security Checks
high