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
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)
|
|
|
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 |