CVE-2019-11253 Information

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.

CVSS Vector

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

Reference

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/!topic/kubernetes-security-announce/jk8polzSUxs https://security.netapp.com/advisory/ntap-20191031-0006/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5