CVE-2020-35514 : Exploit Details and Defense Strategies
Learn about CVE-2020-35514, an insecure modification flaw in OpenShift allowing attackers to potentially add their own node to the cluster. Find out how to mitigate this vulnerability.
An insecure modification flaw in the /etc/kubernetes/kubeconfig file was found in OpenShift, allowing an attacker to potentially add their own node to the OpenShift cluster.
Understanding CVE-2020-35514
This CVE involves an insecure modification flaw in OpenShift that poses risks to confidentiality, integrity, and system availability.
What is CVE-2020-35514?
The vulnerability allows an attacker to copy the kubeconfig file and attempt to add their own node to the OpenShift cluster.
The Impact of CVE-2020-35514
The highest threat from this vulnerability is to confidentiality, integrity, and system availability.
Technical Details of CVE-2020-35514
This section provides technical details about the vulnerability.
Vulnerability Description
An insecure modification flaw in the /etc/kubernetes/kubeconfig file in OpenShift.
Affected Systems and Versions
- Product: openshift/machine-config-operator
- Versions affected: openshift4/ose-machine-config-operator v4.7.0-202105111858.p0
Exploitation Mechanism
The flaw allows an attacker with access to a running container or local access to the node to copy the kubeconfig file and potentially add their own node to the OpenShift cluster.
Mitigation and Prevention
Steps to address and prevent exploitation of CVE-2020-35514.
Immediate Steps to Take
- Monitor for any unauthorized changes to the kubeconfig file.
- Restrict access to containers and nodes to authorized personnel only.
Long-Term Security Practices
- Regularly audit and review access controls within the OpenShift environment.
- Implement strong authentication mechanisms to prevent unauthorized access.
Patching and Updates
- Apply the necessary patches provided by the vendor to address this vulnerability.