CVE-2019-11253: Kubernetes API Server JSON/YAML parsing vulnerable to resource exhaustion attack
First published: Fri Sep 27 2019(Updated: )
A flaw was found kubernetes. The parsing of YAML manifests by the Kubernetes API server could lead to a denial-of-service attack leaving it vulnerable to an instance of a "billion laughs" attack. The highest threat from this vulnerability is to system availability.
Credit: jordan@liggitt.net jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jaeger | <0:v1.13.1.redhat5-1.el7 | 0:v1.13.1.redhat5-1.el7 |
| redhat/jaeger-operator | <0:v1.13.1.redhat8-1.el7 | 0:v1.13.1.redhat8-1.el7 |
| redhat/kiali | <0:v1.0.7.redhat1-1.el7 | 0:v1.0.7.redhat1-1.el7 |
| redhat/servicemesh | <0:1.0.2-3.el8 | 0:1.0.2-3.el8 |
| redhat/servicemesh-cni | <0:1.0.2-3.el8 | 0:1.0.2-3.el8 |
| redhat/servicemesh-grafana | <0:6.2.2-24.el8 | 0:6.2.2-24.el8 |
| redhat/servicemesh-operator | <0:1.0.2-7.el8 | 0:1.0.2-7.el8 |
| redhat/servicemesh-prometheus | <0:2.7.2-25.el8 | 0:2.7.2-25.el8 |
| redhat/servicemesh-proxy | <0:1.0.2-3.el8 | 0:1.0.2-3.el8 |
| redhat/servicemesh-grafana | <0:6.2.2-38.el8 | 0:6.2.2-38.el8 |
| redhat/servicemesh-prometheus | <0:2.7.2-36.el8 | 0:2.7.2-36.el8 |
| redhat/servicemesh-cni | <0:1.0.11-1.el8 | 0:1.0.11-1.el8 |
| redhat/servicemesh-operator | <0:1.1.4-3.el8 | 0:1.1.4-3.el8 |
| redhat/servicemesh-grafana | <0:6.4.3-11.el8 | 0:6.4.3-11.el8 |
| redhat/servicemesh-cni | <0:1.1.4-2.el8 | 0:1.1.4-2.el8 |
| redhat/atomic-openshift | <0:3.10.181-1.git.0.3ab4b3d.el7 | 0:3.10.181-1.git.0.3ab4b3d.el7 |
| redhat/atomic-openshift | <0:3.11.154-1.git.0.7a097ad.el7 | 0:3.11.154-1.git.0.7a097ad.el7 |
| redhat/atomic-openshift | <0:3.9.102-1.git.0.6411f52.el7 | 0:3.9.102-1.git.0.6411f52.el7 |
| redhat/openshift | <0:4.1.20-201910101746.git.0.a80aad5.el8 | 0:4.1.20-201910101746.git.0.a80aad5.el8 |
| Kubernetes Kubernetes | >=1.1.0<=1.12.10 | |
| Kubernetes Kubernetes | >=1.13.0<1.13.2 | |
| Kubernetes Kubernetes | >=1.14.0<1.14.8 | |
| Kubernetes Kubernetes | >=1.15.0<1.15.5 | |
| Kubernetes Kubernetes | >=1.16.0<1.16.2 | |
| Redhat Openshift Container Platform | =3.9 | |
| Redhat Openshift Container Platform | =3.10 | |
| Redhat Openshift Container Platform | =3.11 | |
| go/k8s.io/kubernetes | >=1.16.0<1.16.2 | 1.16.2 |
| go/k8s.io/kubernetes | >=1.15.0<1.15.5 | 1.15.5 |
| go/k8s.io/kubernetes | >=1.14.0<1.14.8 | 1.14.8 |
| go/k8s.io/kubernetes | >=1.0.0<1.13.12 | 1.13.12 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2019-11253
- https://github.com/kubernetes/kubernetes/issues/83253
- https://github.com/kubernetes/kubernetes/pull/83261
- 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://gist.github.com/bgeesaman/0e0349e94cd22c48bf14d8a9b7d6b8f2
- https://groups.google.com/forum/#!topic/kubernetes-security-announce/jk8polzSUxs
- https://security.netapp.com/advisory/ntap-20191031-0006/
- https://github.com/advisories/GHSA-pmqp-h87c-mr78 (Advisory)
- https://www.cve.org/CVERecord?id=CVE-2019-11253 https://nvd.nist.gov/vuln/detail/CVE-2019-11253 https://www.stackrox.com/post/2019/09/protecting-kubernetes-api-against-cve-2019-11253-billion-laughs-attack/
- https://bugzilla.redhat.com/show_bug.cgi?id=1757701
- https://access.redhat.com/errata/RHEA-2019:3809
- https://access.redhat.com/errata/RHSA-2020:2861
- https://access.redhat.com/errata/RHSA-2020:2863
- https://access.redhat.com/errata/RHSA-2020:2870
- https://access.redhat.com/errata/RHSA-2020:2795
- https://access.redhat.com/errata/RHSA-2020:2796
- https://access.redhat.com/errata/RHSA-2020:2799
- https://access.redhat.com/errata/RHSA-2019:3132
- https://access.redhat.com/errata/RHSA-2022:2183
- https://access.redhat.com/security/cve/cve-2019-11253
- https://www.stackrox.com/post/2019/09/protecting-kubernetes-api-against-cve-2019-11253-billion-laughs-attack/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1757702
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxs
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2019-11253?
CVE-2019-11253 is a vulnerability in Kubernetes that allows authorized users to send malicious YAML or JSON payloads, causing the API server to consume excessive CPU or memory, potentially crashing and becoming unresponsive.
How does CVE-2019-11253 impact Kubernetes API server?
CVE-2019-11253 can result in the Kubernetes API server consuming excessive CPU or memory, potentially leading to crash and unresponsiveness.
What is the severity level of CVE-2019-11253?
CVE-2019-11253 has a severity level of 7.5 (high).
Which versions of Kubernetes are affected by CVE-2019-11253?
Versions v1.0-1.12 and versions prior to v1.13.12, v1.14.8, v1.15.5, and v1.16.2 are affected by CVE-2019-11253.
How can I fix CVE-2019-11253?
To fix CVE-2019-11253, ensure that you update your Kubernetes version to at least v1.13.12, v1.14.8, v1.15.5, or v1.16.2.
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