CVE-2021-20267

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.

CVSS v3.0 7.1 HIGH
CVSS v2.0 5.5 MEDIUM

7.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1934330	Issue Tracking Patch Third Party Advisory
https://security.openstack.org/ossa/OSSA-2021-001.html	Patch Vendor Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openstack:neutron:18.0.0:::::::*
	cpe:2.3:a:openstack:neutron::::::::
	cpe:2.3:a:openstack:neutron::::::::

Configuration 2 (hide)

OR	cpe:2.3:a:redhat:openstack_platform:16.1:::::::*
	cpe:2.3:a:redhat:openstack_platform:13.0:::::::*
	cpe:2.3:a:redhat:openstack_platform:10.0:::::::*
	cpe:2.3:a:redhat:openstack_platform:16.2:::::::*

Information

Published : 2021-05-28 12:15

Updated : 2022-10-06 20:00

NVD link : CVE-2021-20267

Mitre link : CVE-2021-20267

JSON object : View

CWE

CWE-345

Insufficient Verification of Data Authenticity

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Products Affected

openstack

neutron

redhat

openstack_platform

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