CVE-2022-24817
Assigner: GitHub_M
Published: 2022-05-06T00:00:14
State: PUBLISHED
affected: product: flux2
vendor: fluxcd
versions: status: affected
version: flux2 < v0.29.0 >= v0.1.0
status: affected
version: helm-controller < v0.23.0 >= v0.1.0
status: affected
version: kustomize-controller < v0.19.0 >= v0.2.0
descriptions: value: Flux2 is an open and extensible continuous delivery solution for Kubernetes. Flux2 versions between 0.1.0 and 0.29.0, helm-controller 0.1.0 to v0.19.0, and kustomize-controller 0.1.0 to v0.23.0 are vulnerable to Code Injection via malicious Kubeconfig. In multi-tenancy deployments this can also lead to privilege escalation if the controller's service account has elevated permissions. Workarounds include disabling functionality via Validating Admission webhooks by restricting users from setting the `spec.kubeConfig` field in Flux `Kustomization` and `HelmRelease` objects. Additional mitigations include applying restrictive AppArmor and SELinux profiles on the controller’s pod to limit what binaries can be executed. This vulnerability is fixed in kustomize-controller v0.23.0 and helm-controller v0.19.0, both included in flux2 v0.29.0
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.9
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
version: 3.1
problemTypes: descriptions: cweId: CWE-94
description: CWE-94: Improper Control of Generation of Code ('Code Injection')
type: CWE
source: advisory: GHSA-vvmq-fwmg-2gjc
discovery: UNKNOWN
title: Improper kubeconfig validation allows arbitrary code execution