CVE Vulnerability

CVE-2019-20175

** 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."

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html Exploit Mailing List
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html Mailing List Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html Mailing List Patch
https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Information

Published : 2019-12-31 04:15

Updated : 2020-01-15 02:11

NVD link : CVE-2019-20175

Mitre link : CVE-2019-20175

Products Affected
No products.
CWE
CWE-754