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CVE-2019-11253

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

HIGH
7.5
CVSS Score
Published: October 17, 2019 at 03:40 PM UTC
Updated: June 17, 2026 at 02:12 AM UTC
2 products affected across 2 vendorsOpenShift Container PlatformKubernetes

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Severity
HIGH7.5
Exploit prediction
EPSS 26%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Kubernetes· Kubernetes
95%
v < 1.13.12v < 1.14.8v < 1.15.5v < 1.16.21.1.0 ≤ v ≤ 1.12.101.13.0 ≤ v < 1.13.121.14.0 ≤ v < 1.14.81.15.0 ≤ v < 1.15.51.16.0 ≤ v < 1.16.21.11.101.111.121.21.31.41.51.61.71.81.9
Affected range stops below 1.13.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.13.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.14.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.15.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.16.2, so it looks safe — our inference, not a vendor statement
OpenShift Container Platform· Red Hatcontainer
95%
3.103.113.9

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:3239
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:3811
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:3905
x_refsource_CONFIRMExploitIssue TrackingMitigationThird Party Advisory
Source: [email protected]
https://github.com/kubernetes/kubernetes/issues/83253
Mailing Listx_refsource_MLISTPermissions Required
Source: [email protected]
https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxs
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20191031-0006/

CVSS

7.5HIGHkubernetes
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20CWE-776

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