CVE-2021-20267 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-20267, a vulnerability in openstack-neutron allowing attackers to impersonate IPv6 addresses, leading to denial of service. Learn mitigation strategies.
A flaw was discovered in the default Open vSwitch firewall rules of openstack-neutron, allowing an attacker to impersonate IPv6 addresses of other network systems, leading to denial of service or potential traffic interception. This affects versions prior to openstack-neutron 15.3.3, 16.3.1, and 17.1.1.
Understanding CVE-2021-20267
This section provides insights into the nature of the vulnerability.
What is CVE-2021-20267?
The vulnerability in openstack-neutron's default Open vSwitch firewall rules enables attackers to impersonate IPv6 addresses, posing risks of denial of service and interception of network traffic.
The Impact of CVE-2021-20267
The exploitation of this vulnerability can lead to severe consequences, including disruption of services and potential interception of sensitive data.
Technical Details of CVE-2021-20267
Delve into the technical aspects of the CVE here.
Vulnerability Description
The flaw allows malicious actors to manipulate packets to impersonate IPv6 addresses within the network, affecting systems using the Open vSwitch driver.
Affected Systems and Versions
Deployments running prior to openstack-neutron 15.3.3, 16.3.1, and 17.1.1 with the Open vSwitch driver are susceptible to this vulnerability.
Exploitation Mechanism
By sending specially crafted packets, threat actors can exploit the flaw to impersonate IPv6 addresses, potentially disrupting services and intercepting network traffic.
Mitigation and Prevention
Discover the necessary steps to prevent and mitigate the risks associated with CVE-2021-20267.
Immediate Steps to Take
Administrators should apply relevant patches and updates to affected systems promptly to mitigate the risk of exploitation.
Long-Term Security Practices
Implement network segmentation, access controls, and regular security audits to bolster overall system security.
Patching and Updates
Regularly monitor for security advisories and apply patches released by the OpenStack project to ensure systems are protected against known vulnerabilities.