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CVE-2022-24877 is a relative path traversal vulnerability in Flux's kustomize-controller, a component of the Flux continuous delivery platform for Kubernetes. A maliciously crafted kustomization.yaml can include ../ path sequences that are not properly constrained to the intended working directory, allowing the controller to resolve and access files outside the expected repository or manifest path. As a result, an attacker can cause the controller to read data from the kustomize-controller pod filesystem. The issue affects the controller's handling of filesystem paths referenced from kustomization.yaml and was fixed in kustomize-controller v0.24.0; the fix is included in flux2 v0.29.0.
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kustomization.yaml files before they are applied. Use CI/CD policy controls or admission-style validation to block path references containing traversal elements such as ../ or references that escape the intended repository/work directory. The provided content specifically notes automated tooling in CI/CD, such as policy validation of kustomization.yaml, as a workaround. Additional defense-in-depth includes minimizing sensitive material available in the controller pod filesystem and reducing controller privileges in multi-tenant environments.Patch, then assume compromise.
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Directory traversal vulnerability in a Go-based Kubernetes operator application allowing access to controller pod filesystem data via ../ sequences in a YAML file.
A directory traversal vulnerability in a Go-based Kubernetes operator that allows access to controller pod filesystem data via ../ sequences in a YAML file.
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