Vulnerability Report

CVE-2021-20267

Title: Openstack Neutron Denial of Service (DoS)

Denial of Service (DoS)

Proof Of Concept

No public PoC currently indexed for CVE-2021-20267.

CWE Category CWE-345

Published Date May 28, 2021

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 7.1 CVSS v3.1

Exploit Probability (EPSS)

1.02%

Vulnerability Summary

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.

Impacted Vendors

openstack 1

redhat 1

Reference Links

https://bugzilla.redhat.com/show_bug.cgi?id=1934330 https://security.openstack.org/ossa/OSSA-2021-001.html https://bugzilla.redhat.com/show_bug.cgi?id=1934330 https://security.openstack.org/ossa/OSSA-2021-001.html

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.5

Access Vector

N/A

Authentication

N/A

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-20267 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

May 28, 2021 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.