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RedhatCVE-2021-20267

HistoryMay 28, 2021 - 7:15 p.m.

CVE-2021-20267

2021-05-2819:15:07

CWE-345

redhat

web.nvd.nist.gov

openstack

neutron

open vswitch

firewall rules

ipv6

denial of service

interception

security vulnerability

nvd

cve-2021-20267

CVSS2

5.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:N/A:P

CVSS3

7.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

AI Score

7.2

Confidence

High

EPSS

0.001

Percentile

29.8%

JSON

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.

Affected configurations

Nvd

Vulners

Node

openstackneutronRange<16.3.3

openstackneutronRange17.0.0–17.1.3

openstackneutronMatch18.0.0

Node

redhatopenstack_platformMatch10.0

redhatopenstack_platformMatch13.0

redhatopenstack_platformMatch16.1

redhatopenstack_platformMatch16.2

VendorProductVersionCPE
openstackneutron*cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
openstackneutron18.0.0cpe:2.3:a:openstack:neutron:18.0.0:*:*:*:*:*:*:*
redhatopenstack_platform10.0cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*
redhatopenstack_platform13.0cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
redhatopenstack_platform16.1cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:*
redhatopenstack_platform16.2cpe:2.3:a:redhat:openstack_platform:16.2:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
openstack	neutron	*	cpe:2.3:a:openstack:neutron::::::::
openstack	neutron	18.0.0	cpe:2.3:a:openstack:neutron:18.0.0:::::::*
redhat	openstack_platform	10.0	cpe:2.3:a:redhat:openstack_platform:10.0:::::::*
redhat	openstack_platform	13.0	cpe:2.3:a:redhat:openstack_platform:13.0:::::::*
redhat	openstack_platform	16.1	cpe:2.3:a:redhat:openstack_platform:16.1:::::::*
redhat	openstack_platform	16.2	cpe:2.3:a:redhat:openstack_platform:16.2:::::::*

CNA Affected

[
  {
    "product": "openstack-neutron",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "openstack-neutron 15.3.3, openstack-neutron 16.3.1, openstack-neutron 17.1.1"
      }
    ]
  }
]