GHSA-p2g7-xwvr-rrw3
Helm Controller denial of service
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/fluxcd/helm-controller | >= 0.0.4, < 0.23.0 | 0.23.0 |
| Go | github.com/fluxcd/flux2 | >= 0.0.17, < 0.32.0 | 0.32.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
Helm controller is tightly integrated with the Helm SDK. [A vulnerability](https://github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxh) found in the Helm SDK allows for specific data inputs to cause high memory consumption, which in some platforms could cause the controller to panic and stop processing reconciliations.
### Impact
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.
### Credits
The initial crash bug was reported by [oss-fuzz](https://github.com/google/oss-fuzz). The Flux Security team produced the first exploit and worked together with the Helm Security team to ensure that both projects were patched timely.
### 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://bugs.chromium.org/p/oss-fuzz/issues/detail?id=48360
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44996
- https://github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxh
References
External links from the advisory. They lead to third-party sites.
- https://github.com/fluxcd/flux2/security/advisories/GHSA-p2g7-xwvr-rrw3
- https://github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxh
- https://nvd.nist.gov/vuln/detail/CVE-2022-36049
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44996
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=48360
- https://github.com/fluxcd/flux2