CVE-2021-38598

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.

OpenStack Neutron versiones anteriores a 16.4.1, 17.x versiones anteriores a 17.1.3 y 18.0.0, permite una suplantación de direcciones de hardware cuando es usado el controlador linuxbridge con ebtables-nft en una plataforma basada en Netfilter. Mediante el envío de paquetes cuidadosamente diseñados, cualquier persona que controle una instancia de servidor conectada al conmutador virtual puede suplantar las direcciones de hardware de otros sistemas en la red, resultando en una denegación de servicio o, en algunos casos, a una posible interceptación del tráfico previsto para otros destinos.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-12 CVE Reserved
2021-08-23 CVE Published
2024-05-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-290: Authentication Bypass by Spoofing

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://launchpad.net/bugs/1938670	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				< 16.4.1 Search vendor "Openstack" for product "Neutron" and version " < 16.4.1"		-		Affected
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				>= 17.0.0 < 17.1.3 Search vendor "Openstack" for product "Neutron" and version " >= 17.0.0 < 17.1.3"		-		Affected
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				18.0.0 Search vendor "Openstack" for product "Neutron" and version "18.0.0"		-		Affected