CVE-2022-39272

MEDIUM5.0EPSS 0.33%

Improper use of metav1.Duration allows for Denial of Service

發布日:2022/10/19修改日:2026/2/4

也稱為:GHSA-f4p5-x4vc-mh4vBIT-flux-2022-39272BIT-kustomize-2022-39272CGA-hwg5-22j5-jjq4GO-2022-1071

描述

Flux controllers within the affected versions range are vulnerable to a denial of service attack. Users that have permissions to change Flux’s objects, either through a Flux source or directly within a cluster, can provide invalid data to fields `.spec.interval` or `.spec.timeout` (and structured variations of these fields), causing the entire object type to stop being processed. The issue has two root causes: a) the Kubernetes type `metav1.Duration` not being fully compatible with the Go type `time.Duration` as explained on [upstream report](https://github.com/kubernetes/apimachinery/issues/131); b) lack of validation within Flux to restrict allowed values. ### Workarounds Admission controllers can be employed to restrict the values that can be used for fields `.spec.interval` and `.spec.timeout`, however upgrading to the latest versions is still the recommended mitigation. ### Credits This issue was reported by Alexander Block (@codablock) through the Flux security mailing list (as [recommended](https://fluxcd.io/security/#report-a-vulnerability)). ### For more information If you have any questions or comments about this advisory: - Open an issue in any of the affected repositories. - Contact us at the CNCF Flux channel. ### References - https://github.com/kubernetes/apimachinery/issues/131

受影響套件(21)

Bitnami/flux>= 0.1.0, < 0.35.0
Bitnami/kustomize>= 0.0.2, < 0.29.0
Go/github.com/fluxcd/flux2>= 0.1.0, < 0.35.0
Go/github.com/fluxcd/helm-controller>= 0.0.1-alpha-1, < 0.24.0
Go/github.com/fluxcd/helm-controller/apifrom 0, < 0.26.0
Go/github.com/fluxcd/helm-controller/apifrom 0, < 0.26.0
Go/github.com/fluxcd/image-automation-controller>= 0.1.0, < 0.26.0
Go/github.com/fluxcd/image-automation-controller/apifrom 0, < 0.26.1
Go/github.com/fluxcd/image-automation-controller/apifrom 0, < 0.26.1
Go/github.com/fluxcd/image-reflector-controller>= 0.1.0, < 0.22.0
Go/github.com/fluxcd/image-reflector-controller/apifrom 0, < 0.22.1
Go/github.com/fluxcd/image-reflector-controller/apifrom 0, < 0.22.1
Go/github.com/fluxcd/kustomize-controller>= 0.0.1-alpha-1, < 0.29.0
Go/github.com/fluxcd/kustomize-controller/apifrom 0, < 0.30.0
Go/github.com/fluxcd/kustomize-controller/apifrom 0, < 0.30.0
Go/github.com/fluxcd/notification-controller>= 0.0.1-alpha-1, < 0.27.0
Go/github.com/fluxcd/notification-controller/apifrom 0, < 0.28.0
Go/github.com/fluxcd/notification-controller/apifrom 0, < 0.28.0
Go/github.com/fluxcd/source-controller>= 0.0.1-alpha-1, < 0.30.0
Go/github.com/fluxcd/source-controller/apifrom 0, < 0.30.0
Go/github.com/fluxcd/source-controller/apifrom 0, < 0.30.0

CVSS 分數

來源	版本	嚴重程度	向量
osv	CVSS 3.1	MEDIUM5.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

描述

受影響套件(21)

CVSS 分數

參考連結(13)