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GHSA-69p3-xp37-f692

Improper Certificate Validation in kubeclient

Source: GitHub Advisory Database (reviewed) High CVE-2022-0759

Packages

EcosystemPackageAffectedFixed in
RubyGems kubeclient < 4.9.3 4.9.3

Details

As written in the advisory (Markdown source, shown as plain text).

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

References

External links from the advisory. They lead to third-party sites.