CVE-2021-3667

libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly released on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions could use this flaw to acquire the lock and prevent other users from accessing storage pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

Se ha encontrado un problema de bloqueo inapropiado en la API virStoragePoolLookupByTargetPath de libvirt. Ocurre en la función storagePoolLookupByTargetPath, donde un objeto virStoragePoolObj bloqueado no es liberado apropiadamente al fallar el permiso ACL. Los clientes que son conectados al socket de lectura-escritura con permisos ACL limitados podrían usar este fallo para adquirir el bloqueo e impedir que otros usuarios accedan a las APIs de pools/volúmenes de almacenamiento, resultando en una condición de denegación de servicio. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-27 CVE Reserved
2021-10-01 CVE Published
2024-08-03 CVE Updated
2024-11-02 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-667: Improper Locking

CAPEC

References (7)

URL	Tag	Source
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
https://security.netapp.com/advisory/ntap-20220331-0005	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://gitlab.com/libvirt/libvirt/-/commit/447f69dec47e1b0bd15ecd7cd49a9fd3b050fb87	2024-04-01

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1986094	2021-11-09
https://security.gentoo.org/glsa/202210-06	2024-04-01
https://access.redhat.com/security/cve/CVE-2021-3667	2021-11-09

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"				<= 7.5.0 Search vendor "Redhat" for product "Libvirt" and version " <= 7.5.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		advanced_virtualization		Affected
Netapp Search vendor "Netapp"		Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility"				-		-		Affected