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CVE-2019-20175

7.5 · HIGH

An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0.

Published Dec 31, 2019CWE-754EPSS 3.36%

Overview

CVE-2019-20175 is a high-severity vulnerability. It was published on December 31, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.htmlRefwww.mail-archive.com/qemu-devel%40nongnu.org/msg667396.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.htmlReflists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.htmlRefwww.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html

How CyberStrike helps

Frequently asked questions

What is CVE-2019-20175?

CVE-2019-20175 is a high-severity vulnerability. It was published on December 31, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2019-20175?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-20175?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-20175?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-20175 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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