CVE-2019-1002100 Kubernetes DoS Vulnerability

What is CVE-2019-1002100?

CVE-2019-1002100 is a medium-severity denial of service vulnerability in Kubernetes Kubernetes, published on 1 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In all Kubernetes versions prior to v1.11.8, v1.12.6, and v1.13.4, users that are authorized to make patch requests to the Kubernetes API Server can send a specially crafted patch of type "json-patch" (e.g. `kubectl patch --type json` or `"Content-Type: application/json-patch+json"`) that consumes excessive resources while processing, causing a Denial of Service on the API Server.

Weakness: CWE-770

Which versions are affected by CVE-2019-1002100?

9 open source packages ship an affected version, including k8s.io/kubernetes. It affects 2 products.

Products include Kubernetes Kubernetes, Redhat Openshift Container Platform.

How do I fix CVE-2019-1002100?

Upgrade k8s.io/kubernetes to a fixed version for your release line: 1.11.8, 1.12.6 or 1.13.4.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-1002100 being exploited?

There is no known exploitation of CVE-2019-1002100 in the wild and no public exploit code.

Other vulnerabilities in Kubernetes Kubernetes

• CVE-2018-1002105 Privilege Escalation in Kubernetes Critical 9.8
• CVE-2017-1000056 Kubernetes Privilege Escalation Critical 9.8
• CVE-2016-1906 Authorization bypass in Openshift Critical 9.8
• CVE-2023-3676 Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation High 8.8
• CVE-2023-3955 Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation High 8.8

All Kubernetes Kubernetes vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-1002100, GHSA-q4rr-64r9-fwgf, GO-2023-1946.