CVE-2022-24817

Improper kubeconfig validation allows arbitrary code execution

Description

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

Category

9.9
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Third-Party Advisory github.com
Affected: fluxcd flux2
Published at:
Updated at:

References

Link Tags
https://github.com/fluxcd/flux2/security/advisories/GHSA-vvmq-fwmg-2gjc third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-24817?
CVE-2022-24817 has been scored as a critical severity vulnerability.
How to fix CVE-2022-24817?
To fix CVE-2022-24817, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-24817 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-24817 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-24817?
CVE-2022-24817 affects fluxcd flux2.
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