CVE-2019-11253

high-risk
Published 2019-10-17

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.

Do I need to act?

!
83.8% chance of exploitation in next 30 days
EPSS score — higher than 16% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Redhat Kubernetes

References (12)

Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3239
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3811
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3905
Exploit https://github.com/kubernetes/kubernetes/issues/83253
Permissions Required https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSU...
Third Party Advisory https://security.netapp.com/advisory/ntap-20191031-0006/
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3239
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3811
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3905
Exploit https://github.com/kubernetes/kubernetes/issues/83253
Permissions Required https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSU...
Third Party Advisory https://security.netapp.com/advisory/ntap-20191031-0006/
56
/ 100
high-risk
Severity 26/34 · High
Exploitability 20/34 · Moderate
Exposure 10/34 · Low