CVE-2022-24817

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

CVSS v3.0 9.9 CRITICAL
CVSS v2.0 6.5 MEDIUM

9.9^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/fluxcd/flux2/security/advisories/GHSA-vvmq-fwmg-2gjc	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fluxcd:kustomize-controller::::::::
	cpe:2.3:a:fluxcd:helm-controller::::::::
	cpe:2.3:a:fluxcd:flux2::::::::

Information

Published : 2022-05-05 17:15

Updated : 2022-05-16 12:07

NVD link : CVE-2022-24817

Mitre link : CVE-2022-24817

JSON object : View

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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Products Affected

fluxcd

flux2
helm-controller
kustomize-controller

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