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CVE-2021-20267

Published: May 28, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-345
NVD MITRE
7.1CVSSHIGH
EPSS Score
1.0%
Top 41.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-345

Affected Products

openstack-neutronn/a
neutronPyPIOSS Libraries
neutronopenstack
On-premNetwork Device
Cloud & SaaS / cloud-platform
openstack platformredhat
SaaSSaaS Service
Cloud & SaaS / cloud-platform
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
pypipackage-ecosystemOSS Libraries
openstackoss-projectUSCloud & SaaSaka openstack foundation
redhatcommercialUSOperating Systemsaka red hat
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://bugzilla.redhat.com/show_bug.cgi?id=1934330
bugzilla.redhat.com
https://security.openstack.org/ossa/OSSA-2021-001.html
security.openstack.org
https://nvd.nist.gov/vuln/detail/CVE-2021-20267
nvd.nist.gov
and 8 more references View all →

Timeline

Published
May 28, 2021
Last Updated
Nov 21, 2024

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