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CVE-2020-25723

Published: 18 November 2020

A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service.

Priority

Medium

Cvss 3 Severity Score

3.2

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic
Released (1:2.11+dfsg-1ubuntu7.34)
focal
Released (1:4.2-3ubuntu6.10)
groovy
Released (1:5.0-5ubuntu9.2)
hirsute
Released (1:5.2+dfsg-2ubuntu1)
impish
Released (1:5.2+dfsg-2ubuntu1)
jammy
Released (1:5.2+dfsg-2ubuntu1)
kinetic
Released (1:5.2+dfsg-2ubuntu1)
lunar
Released (1:5.2+dfsg-2ubuntu1)
mantic
Released (1:5.2+dfsg-2ubuntu1)
noble
Released (1:5.2+dfsg-2ubuntu1)
trusty Needed

upstream
Released (1:5.2+dfsg-1)
xenial
Released (1:2.5+dfsg-5ubuntu10.48)
Patches:
upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=2fdb42d840400d58f2e706ecca82c142b97bcbd6
qemu-kvm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 3.2
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L