CVE-2021-20267
Apache Openstack Neutron OpenVSwitch IPv6 Impersonation Bypass
Description
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.
INFO
Published Date :
May 28, 2021, 7:15 p.m.
Last Modified :
Oct. 7, 2022, 3 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.2
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-20267
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-20267.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20267 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20267 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 07, 2022
Action Type Old Value New Value Changed Reference Type https://security.openstack.org/ossa/OSSA-2021-001.html No Types Assigned https://security.openstack.org/ossa/OSSA-2021-001.html Patch, Vendor Advisory Changed CPE Configuration OR *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions up to (excluding) 15.3.3 *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions from (including) 16.0.0 up to (excluding) 16.3.1 *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions from (including) 17.0.0 up to (excluding) 17.1.1 OR *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions up to (excluding) 16.3.3 *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions from (including) 17.0.0 up to (excluding) 17.1.3 *cpe:2.3:a:openstack:neutron:18.0.0:*:*:*:*:*:*:* Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:16.2:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 12, 2021
Action Type Old Value New Value Added Reference https://security.openstack.org/ossa/OSSA-2021-001.html [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 10, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1934330 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1934330 Issue Tracking, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions up to (excluding) 15.3.3 *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions from (including) 16.0.0 up to (excluding) 16.3.1 *cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* versions from (including) 17.0.0 up to (excluding) 17.1.1 Added CPE Configuration OR *cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20267 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-20267
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} -0.03%
score
0.27480
percentile