CVE-2019-11253
XML Entity Expansion and Improper Input Validation in Kubernetes API server in k8s.io/kubernetes
Description
Improper input validation in the Kubernetes API server in versions v1.0-1.12 and versions prior to v1.13.12, v1.14.8, v1.15.5, and v1.16.2 allows authorized users to send malicious YAML or JSON payloads, causing the API server to consume excessive CPU or memory, potentially crashing and becoming unavailable. Prior to v1.14.0, default RBAC policy authorized anonymous users to submit requests that could trigger this vulnerability. Clusters upgraded from a version prior to v1.14.0 keep the more permissive policy by default for backwards compatibility.
How to fix CVE-2019-11253
To remediate CVE-2019-11253, upgrade the affected package to a fixed version below.
- —upgrade to 1.17.4-1 or later
- —upgrade to 1.13.12 or later
- —upgrade to 1.13.12 or later
Is CVE-2019-11253 being exploited?
Likely — EPSS is 84.5%, placing CVE-2019-11253 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 1.17.4-1
- >= 1.0.0, < 1.13.12
- >= 1.0.0, < 1.13.12, >= 1.14.0, < 1.14.8, >= 1.15.0, < 1.15.5, >= 1.16.0, < 1.16.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |