What it is
Orchestration ports: Docker API, Kubernetes API, Kubelet.
Why it is risky
An unauthenticated Docker API (2375) is effectively root on the host — the worst possible exposure.
What to do
Never publish the API; enforce TLS·mutual-auth·RBAC and keep it on internal networks.
Is it listening on your server?
Linux
ss -ltnp 'sport = :10250'Known vulnerabilities in Kubelet
| CVE | Title | CVSS | Exploited | EPSS | Published |
|---|---|---|---|---|---|
| CVE-2016-1906 | Openshift allows remote attackers to gain privileges by updating a build configuration that was created with a... | 9.8 | — | 2016-02-04 | |
| CVE-2017-1000056 | Kubernetes version 1.5.0-1.5.4 is vulnerable to a privilege escalation in the PodSecurityPolicy admission plug... | 9.8 | — | 2017-07-14 | |
| CVE-2018-1002105 | In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to p... | 9.8 | — | 2018-12-06 | |
| CVE-2017-1002101 | In Kubernetes versions 1.3.x, 1.4.x, 1.5.x, 1.6.x and prior to versions 1.7.14, 1.8.9 and 1.9.4 containers usi... | 8.8 | — | 2018-03-14 |
Track these versions on your own servers
InfraGuard collects installed software versions from every server and flags the ones with known vulnerabilities. Self-hosted — nothing leaves your network.