CVE-2019-11253

HIGH NUCLEI

Kubernetes v1.0-1.12 and < v1.13.12, v1.14.8, v1.15.5, v1.16.2 - Denial of Service via Malicious YAML/JSON Payloads

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2019-11253 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

Kubernetes API Server - YAML Parsing DoS (Billion Laughs)
HIGHby ritikchaddha
Shodan: http.favicon.hash:-847792508
FOFA: icon_hash="-847792508"

References (6)

Core 6
Core References
Exploit, Issue Tracking, Mitigation, Third Party Advisory x_refsource_confirm
https://github.com/kubernetes/kubernetes/issues/83253
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:3239
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20191031-0006/
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:3811
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:3905

Scores

CVSS v3 7.5
EPSS 0.2594
EPSS Percentile 97.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-776 CWE-20
Status published
Products (5)
k8s.io/kubernetes 1.0.0 - 1.13.12Go
kubernetes/kubernetes 1.1.0 - 1.12.10
redhat/openshift_container_platform 3.9
redhat/openshift_container_platform 3.10
redhat/openshift_container_platform 3.11
Published Oct 17, 2019
Tracked Since Feb 18, 2026