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Improper Check for Unusual or Exceptional Conditions The advisory has been revoked - it doesn't affect any version of package qemu  (opens in a new tab)

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EPSS
3.36% (88th percentile)

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  • Snyk IDSNYK-UBUNTU1804-QEMU-612017
  • published10 Sept 2020
  • disclosed31 Dec 2019
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Introduced: 31 Dec 2019

CVE-2019-20175  (opens in a new tab)
CWE-754  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Ubuntu.

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.