CVE-2019-11253highCWE-20

Kubernetes API Server JSON/YAML parsing vulnerable to resource exhaustion attack

41Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 7.5epss 26%

exploitation probability

26%top 2% of all CVEs

observed exploitation

nono source reports it

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Kubernetes · Kubernetes

References

https://access.redhat.com/errata/RHSA-2019:3239 https://access.redhat.com/errata/RHSA-2019:3811 https://access.redhat.com/errata/RHSA-2019:3905 https://github.com/kubernetes/kubernetes/issues/83253 https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxs https://security.netapp.com/advisory/ntap-20191031-0006/