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CVE-2020-14364

Published: 24 August 2020

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.

Priority

Medium

Cvss 3 Severity Score

5.0

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic
Released (1:2.11+dfsg-1ubuntu7.32)
focal
Released (1:4.2-3ubuntu6.6)
groovy
Released (1:5.0-5ubuntu9)
hirsute
Released (1:5.0-5ubuntu9)
trusty
Released (2.0.0+dfsg-2ubuntu1.47+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (1:2.5+dfsg-5ubuntu10.46)
Patches:
other: https://www.openwall.com/lists/oss-security/2020/08/24/3/1
upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=b946434f2659a182afc17e155be6791ebfb302eb
qemu-kvm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 5.0
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L