CVE-2018-1002104 : Exploit Details and Defense Strategies

CVE-2018-1002104, related to Kubernetes, involves the exposure of prometheus metrics in versions prior to 1.5 of the Kubernetes ingress default backend.

Understanding CVE-2018-1002104

This CVE highlights a vulnerability in the Kubernetes ingress default backend that could lead to the public exposure of prometheus metrics.

What is CVE-2018-1002104?

The issue involves versions below 1.5 of the Kubernetes ingress default backend, responsible for managing invalid ingress traffic, exposing prometheus metrics publicly.

The Impact of CVE-2018-1002104

The vulnerability has a CVSS base score of 5.3, indicating a medium severity issue with low confidentiality impact and no integrity impact.

Technical Details of CVE-2018-1002104

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability allows public exposure of prometheus metrics in versions prior to 1.5 of the Kubernetes ingress default backend.

Affected Systems and Versions

Product: k8s.gcr.io/defaultbackend
Vendor: Kubernetes
Versions Affected: < 1.5

Exploitation Mechanism

The exposure occurs due to the mishandling of ingress traffic by the Kubernetes ingress default backend.

Mitigation and Prevention

Protecting systems from CVE-2018-1002104 is crucial. Here are some steps to mitigate and prevent exploitation.

Immediate Steps to Take

Mask the /metrics endpoint with an Ingress rule to prevent public exposure.

Long-Term Security Practices

Regularly monitor and update Kubernetes components to ensure security.

Patching and Updates

Apply patches and updates provided by Kubernetes to address this vulnerability.