// For flags

CVE-2021-20267

 

Severity Score

7.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6 addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron 16.3.1 and openstack-neutron 17.1.1 are affected.

Se encontró un fallo en las reglas de firewall predeterminadas de Open vSwitch de openstack-neutron. Mediante el envío de paquetes cuidadosamente diseñados, cualquier persona que tenga el control de una instancia de servidor conectada al switch virtual puede hacerse pasar por las direcciones IPv6 de otros sistemas en la red, resultando en una denegación de servicio o, en algunos casos, posiblemente en la interceptación del tráfico destinado a otros destinos. Solo están afectadas las implementaciones que usan el controlador Open vSwitch. Fuente: OpenStack project. Las versiones anteriores a openstack-neutron 15.3.3, openstack-neutron versión 16.3.1 y openstack-neutron versión 17.1.1 están afectadas

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-17 CVE Reserved
  • 2021-05-28 CVE Published
  • 2024-02-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
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"
 < 16.3.3
Search vendor "Openstack" for product "Neutron" and version " < 16.3.3"
-
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
Redhat
Search vendor "Redhat"
 Openstack Platform
Search vendor "Redhat" for product "Openstack Platform"
 10.0
Search vendor "Redhat" for product "Openstack Platform" and version "10.0"
-
Affected
Redhat
Search vendor "Redhat"
 Openstack Platform
Search vendor "Redhat" for product "Openstack Platform"
 13.0
Search vendor "Redhat" for product "Openstack Platform" and version "13.0"
-
Affected
Redhat
Search vendor "Redhat"
 Openstack Platform
Search vendor "Redhat" for product "Openstack Platform"
 16.1
Search vendor "Redhat" for product "Openstack Platform" and version "16.1"
-
Affected
Redhat
Search vendor "Redhat"
 Openstack Platform
Search vendor "Redhat" for product "Openstack Platform"
 16.2
Search vendor "Redhat" for product "Openstack Platform" and version "16.2"
-
Affected