// For flags

CVE-2022-0897

libvirt: missing locking in nwfilterConnectNumOfNWFilters can lead to denial of service

Severity Score

4.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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).

Se ha encontrado un fallo en el controlador nwfilter de libvirt. El método virNWFilterObjListNumOfNWFilters no adquiría el mutex driver->nwfilters antes de iterar sobre las instancias virNWFilterObj. No había protección para evitar que otro hilo modificara simultáneamente el objeto driver->nwfilters. Este fallo permite a un usuario malicioso y sin privilegios aprovechar este problema a través de la API virConnectNumOfNWFilters de libvirt para bloquear el demonio de gestión de filtros de red (libvirtd/virtnwfilterd)

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2022-03-09 CVE Reserved
  • 2022-03-25 CVE Published
  • 2024-04-02 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-667: Improper Locking
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Redhat
Search vendor "Redhat"
 Libvirt
Search vendor "Redhat" for product "Libvirt"
 <= 1.1.1
Search vendor "Redhat" for product "Libvirt" and version " <= 1.1.1"
-
Affected
Netapp
Search vendor "Netapp"
 Ontap Select Deploy Administration Utility
Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility"
--
Affected