The Kubelet component in versions 1.15.0-1.15.9, 1.16.0-1.16.6, and 1.17.0-1.17.2 has been found to be vulnerable to a denial of service attack via the kubelet API, including the unauthenticated HTTP read-only API typically served on port 10255, and the authenticated HTTPS API typically served on port 10250.
Weakness
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kubernetes | Kubernetes | 1.15.0 (including) | 1.15.9 (including) |
| Kubernetes | Kubernetes | 1.16.0 (including) | 1.16.6 (including) |
| Kubernetes | Kubernetes | 1.17.0 (including) | 1.17.2 (including) |
| Red Hat OpenShift Container Platform 4.3 | RedHat | openshift-0:4.3.10-202003300855.git.0.da48c1d.el8 | * |
| Red Hat OpenShift Container Platform 4.3 | RedHat | openshift4/ose-hyperkube:v4.3.10-202003311925 | * |
Potential Mitigations
References
- https://github.com/kubernetes/kubernetes/issues/89377
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/2UOlsba2g0s
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
- https://security.netapp.com/advisory/ntap-20200413-0003/
- https://github.com/kubernetes/kubernetes/issues/89377
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/2UOlsba2g0s
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
- https://security.netapp.com/advisory/ntap-20200413-0003/