CVE-2019-11253
Published: August 31, 2023Last modified: August 31, 2023
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | containerd | Not affected (1.6.18-r2) |
| Stream | containerd | Not affected (1.7.5-r0) |
References
- 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://github.com/kubernetes/kubernetes/issues/83253
- https://groups.google.com/forum/#!topic/kubernetes-security-announce/jk8polzSUxs
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxs
- https://security.netapp.com/advisory/ntap-20191031-0006/