2024-11-20
:
Cert-manager, a Kubernetes addon for managing TLS certificates, is vulnerable to a denial-of-service (DoS) attack. An attacker can exploit this vulnerability by crafting malicious PEM-encoded data that can cause the cert-manager controller pod to consume excessive CPU resources, leading to degraded performance or complete unavailability.
Vulnerability Details:
Platform: cert-manager
Version: All versions since v0.1.0
Vulnerability: Denial-of-service (DoS)
Severity: Medium
Date: [Date of vulnerability disclosure]
What Undercode Says:
This vulnerability highlights the importance of secure configuration and access control in Kubernetes environments. While the impact of this specific issue is mitigated by resource limits and RBAC restrictions, it underscores the broader risk of malicious inputs and resource exhaustion attacks.
To mitigate this vulnerability, it is crucial to:
Update to the latest patched versions: Upgrade cert-manager to v1.16.2, v1.15.4, or v1.12.14 to address the vulnerability.
Implement robust RBAC: Enforce strict access controls to limit who can modify Secret resources containing PEM data.
Monitor resource usage: Keep an eye on CPU usage of cert-manager pods to detect any anomalies or signs of resource exhaustion.
Stay informed about security advisories: Regularly check for security updates and advisories from cert-manager and Kubernetes.
By following these best practices, organizations can significantly reduce the risk of exploitation and protect their Kubernetes clusters from potential disruptions.
References:
Reported By: Github.com
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