CVE-2019-20175

Qemu vulnerability

CVSS

7.5

EPSS

3.4%

EPSS pct

87th

Exploited

No known

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.

Affected vendor

Qemu

Affected product

Qemu

CVSS vector

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

Weakness type (CWE)

CWE-754

Published

2019-12-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2019-20175

Confirm whether Qemu Qemu is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-20175.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-20175

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-20175 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2019-20175?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2019-20175.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH

CVE-2011-2442

Acrobat Reader vulnerability

Simatic Wincc Flexible Runtime vulnerability