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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/fluxcd/helm-controllerGo | >= 0.0.4, < 0.23.0 | 0.23.0 |
github.com/fluxcd/flux2Go | >= 0.0.17, < 0.32.0 | 0.32.0 |
Affected products
5- osv-coords4 versionspkg:bitnami/fluxpkg:bitnami/helmpkg:golang/github.com/fluxcd/flux2pkg:golang/github.com/fluxcd/helm-controller
>= 0.0.17, < 0.32.0+ 3 more
- (no CPE)range: >= 0.0.17, < 0.32.0
- (no CPE)range: >= 3.0.0, < 3.9.4
- (no CPE)range: >= 0.0.17, < 0.32.0
- (no CPE)range: >= 0.0.4, < 0.23.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-p2g7-xwvr-rrw3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2022-36049ghsaADVISORY
- bugs.chromium.org/p/oss-fuzz/issues/detailghsax_refsource_MISCWEB
- bugs.chromium.org/p/oss-fuzz/issues/detailghsax_refsource_MISCWEB
- github.com/fluxcd/flux2/security/advisories/GHSA-p2g7-xwvr-rrw3ghsax_refsource_CONFIRMWEB
- github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxhghsax_refsource_MISCWEB
News mentions
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