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.
The product does not properly control the allocation and maintenance of a limited resource.
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
| Link | Tags |
|---|---|
| https://github.com/fluxcd/flux2/security/advisories/GHSA-p2g7-xwvr-rrw3 | third party advisory |
| https://github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxh | third party advisory |
| https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44996 | third party advisory mailing list |
| https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=48360 | third party advisory mailing list |