CVE-2022-36049
Flux2 Helm Controller denial of service
Description
Flux2 is a tool for keeping Kubernetes clusters in sync with sources of configuration, and Flux's helm-controller is a Kubernetes operator that allows one to declaratively manage Helm chart releases. Helm controller is tightly integrated with the Helm SDK. A vulnerability found in the Helm SDK that affects flux2 v0.0.17 until v0.32.0 and helm-controller v0.0.4 until v0.23.0 allows for specific data inputs to cause high memory consumption. In some platforms, this could cause the controller to panic and stop processing reconciliations. In a shared cluster multi-tenancy environment, a tenant could create a HelmRelease that makes the controller panic, denying all other tenants from their Helm releases being reconciled. Patches are available in flux2 v0.32.0 and helm-controller v0.23.0.
How to fix CVE-2022-36049
To remediate CVE-2022-36049, upgrade the affected package to a fixed version below.
- —upgrade to 0.32.0 or later
- —upgrade to 3.9.4 or later
- —upgrade to 0.32.0 or later
- —upgrade to 0.23.0 or later
Is CVE-2022-36049 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 0.0.17, < 0.32.0
- >= 3.0.0, < 3.9.4
- >= 0.0.17, < 0.32.0
- >= 0.0.4, < 0.23.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |