Vulnerability in Fluxcd Flux2
CVE-2022-39272
Flux is an open and extensible continuous delivery solution for Kubernetes. Versions prior to 0.35.0 are subject to a Denial of Service. 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. This issue is patched in version 0.35.0. As a workaround, 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (50.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Fluxcd Flux2 — versions < 0.35.0
- Fluxcd Helm-Controller — versions 0.0.1
- Fluxcd Image-Automation-Controller
- Fluxcd Image-Reflector-Controller
- Fluxcd Kustomize-Controller — versions 0.0.1
- Fluxcd Notification-Controller — versions 0.0.1
- Fluxcd Source-Controller — versions 0.0.1
Weakness classification (CWE)
References
- github.com/fluxcd/flux2/security/advisories/GHSA-f4p5-x4vc-mh4v (Third Party Advisory)
- github.com/kubernetes/apimachinery/issues/131 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2022-39272?
- CVE-2022-39272 is a medium-severity vulnerability in Fluxcd Flux2, classified under Improper Validation of Specified Quantity in Input. CVSS score: 5.0/10. Published 2022-10-22.
- How severe is CVE-2022-39272?
- Medium severity. CVSS v3 base score is 5.0 out of 10.