CVE-2021-20203

CVE Details

Release Date:	2021-02-25
Impact:	None	What is this?

Description

An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

See more information about CVE-2021-20203 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	3.2
Vector String:	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	High
User Interaction:	None
Scope:	Changed
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Low

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (qemu)	ELSA-2022-9123	2022-02-05
Oracle Linux version 8 (hivex)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libguestfs)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libguestfs-winsupport)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libiscsi)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libnbd)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libvirt)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libvirt-dbus)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (libvirt-python)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (nbdkit)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (netcf)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (perl-Sys-Virt)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (qemu-kvm)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (seabios)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (sgabios)	ELSA-2022-9172	2022-02-25
Oracle Linux version 8 (supermin)	ELSA-2022-9172	2022-02-25