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CVE-2022-0897

Published: 25 March 2022

A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).

Priority

Low

Cvss 3 Severity Score

4.3

Score breakdown

Status

Package Release Status
libvirt
Launchpad, Ubuntu, Debian
bionic
Released (4.0.0-1ubuntu8.21)
focal
Released (6.0.0-0ubuntu8.16)
trusty Needs triage

upstream Needs triage

xenial Needs triage

impish
Released (7.6.0-0ubuntu1.2)
kinetic Not vulnerable
(8.6.0-0ubuntu3.1)
lunar Not vulnerable
(9.0.0-2ubuntu1)
jammy
Released (8.0.0-1ubuntu7.5)
mantic Not vulnerable
(9.0.0-2ubuntu1)
Patches:
upstream: https://gitlab.com/libvirt/libvirt/-/commit/a4947e8f63c3e6b7b067b444f3d6cf674c0d7f36

Severity score breakdown

Parameter Value
Base score 4.3
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L