CVE-2019-20175 Detail

Current 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."


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html Exploit  Mailing List  Third Party Advisory 
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  Third Party Advisory 
https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-754 Improper Check for Unusual or Exceptional Conditions cwe source acceptance level NIST  

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Change History

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Quick Info

CVE Dictionary Entry:
CVE-2019-20175
NVD Published Date:
12/30/2019
NVD Last Modified:
01/15/2020
Source:
MITRE