CVE-2021-40797 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-40797 on OpenStack Neutron routes middleware. Learn about the vulnerability, affected versions, exploitation mechanism, and mitigation steps.
OpenStack Neutron before versions 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1 is affected by a routes middleware issue that allows authenticated users to degrade API performance or cause denial of service.
Understanding CVE-2021-40797
This CVE involves a vulnerability in OpenStack Neutron versions, potentially leading to memory consumption issues and service disruption.
What is CVE-2021-40797?
An issue in the routes middleware in OpenStack Neutron allows authenticated users to exploit nonexistent controllers, leading to memory exhaustion in the API worker and subsequent performance degradation or denial of service.
The Impact of CVE-2021-40797
The vulnerability could result in severe API performance degradation or complete denial of service when exploited by authenticated users.
Technical Details of CVE-2021-40797
This section provides technical insights into the vulnerability.
Vulnerability Description
The flaw in OpenStack Neutron's routes middleware allows authenticated users to trigger memory consumption by sending API requests to nonexistent controllers, leading to performance issues.
Affected Systems and Versions
- OpenStack Neutron versions before 16.4.1
- OpenStack Neutron versions 17.x before 17.2.1
- OpenStack Neutron versions 18.x before 18.1.1
Exploitation Mechanism
The vulnerability can be exploited by authenticated users sending API requests involving nonexistent controllers, causing the API worker to consume increasing amounts of memory and impacting system performance.
Mitigation and Prevention
Actions and practices to mitigate the impact of CVE-2021-40797.
Immediate Steps to Take
- Apply the recommended patches provided by OpenStack as soon as possible.
- Monitor system performance for any signs of degradation.
Long-Term Security Practices
- Regularly update and patch OpenStack Neutron to prevent known vulnerabilities.
- Conduct security training for staff to recognize and respond to potential security threats.
Patching and Updates
Keep OpenStack Neutron updated with the latest patches and security updates to safeguard the system against potential exploits.