Kubelet Not Managing Ip Tables
- Query id: 5f89001f-6dd9-49ff-9b15-d8cd71b617f4
- Query name: Kubelet Not Managing Ip Tables
- Platform: Kubernetes
- Severity: Medium
- Category: Networking and Firewall
- URL: Github
Description¶
Kubelet argument --make-iptables-util-chains should be true
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Postitive test num. 1 - yaml file
apiVersion: v1
kind: Pod
metadata:
name: command-demo
labels:
purpose: demonstrate-command
spec:
containers:
- name: command-demo-container
image: joaodanielrufino/kubelet
command: ["kubelet"]
args: ["--make-iptables-util-chains=false"]
restartPolicy: OnFailure
Postitive test num. 2 - yaml file
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
evictionHard:
memory.available: "200Mi"
makeIPTablesUtilChains: false
Postitive test num. 3 - json file
{
"apiVersion": "kubelet.config.k8s.io/v1beta1",
"evictionHard": {
"memory.available": "200Mi"
},
"kind": "KubeletConfiguration",
"makeIPTablesUtilChains": false,
"port": 20250,
"serializeImagePulls": false,
"address": "192.168.0.8"
}
Code samples without security vulnerabilities¶
Negative test num. 1 - yaml file
apiVersion: v1
kind: Pod
metadata:
name: command-demo
labels:
purpose: demonstrate-command
spec:
containers:
- name: command-demo-container
image: joaodanielrufino/kubelet
command: ["kubelet"]
args: ["--make-iptables-util-chains=true"]
restartPolicy: OnFailure
Negative test num. 2 - yaml file
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
evictionHard:
memory.available: "200Mi"
makeIPTablesUtilChains: true
Negative test num. 3 - yaml file
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
evictionHard:
memory.available: "200Mi"