CVE•Published 2019-10-17•1 article on news•7 live references•NVD data

CVE-2019-11253

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

7.5

HIGH

EPSS percentile

Exploit Prediction Scoring System · top 2% of all CVEs

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.

Timeline

Published 2019-10-17

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2019-11253

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Kubernetes Kubernetes" version:"1.1.0"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"Kubernetes"

HTTP body or banner mentions "Kubernetes" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2019-11253