Bind Address Not Properly Set
- Query id: 46a2e9ec-6a5f-4faa-9d39-4ea44d5d87a2
- Query name: Bind Address Not Properly Set
- Platform: Kubernetes
- Severity: Info
- Category: Networking and Firewall
- CWE: 710
- URL: Github
Description¶
When using kube-controller-manager or kube-scheduler commands, the '--bind-address' should be set to 127.0.0.1
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive test num. 1 - yaml file
apiVersion: v1
kind: Pod
metadata:
name: command-demo
labels:
purpose: demonstrate-command
spec:
containers:
- name: command-demo-container
image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
command: ["kube-controller-manager","--bind-address=0.0.0.0"]
args: []
restartPolicy: OnFailure
Positive test num. 2 - yaml file
apiVersion: v1
kind: Pod
metadata:
name: command-demo
labels:
purpose: demonstrate-command
spec:
containers:
- name: command-demo-container
image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
command: ["kube-controller-manager"]
args: []
restartPolicy: OnFailure
Positive test num. 3 - yaml file
apiVersion: v1
kind: Pod
metadata:
labels:
component: kube-scheduler
tier: control-plane
name: kube-scheduler
namespace: kube-system
spec:
selector:
matchLabels:
app: kube-controller-manager
template:
metadata:
labels:
app: kube-controller-manager
containers:
- name: command-demo-container
image: k8s.gcr.io/kube-scheduler:v1.19.0
command: ["kube-scheduler"]
args: []
restartPolicy: OnFailure
Positive test num. 4 - yaml file
apiVersion: v1
kind: Pod
metadata:
labels:
component: kube-scheduler
tier: control-plane
name: kube-scheduler
namespace: kube-system
spec:
selector:
matchLabels:
app: kube-controller-manager
template:
metadata:
labels:
app: kube-controller-manager
containers:
- name: command-demo-container
image: k8s.gcr.io/kube-scheduler:v1.19.0
command: ["kube-scheduler","--bind-address=0.0.0.0"]
args: []
restartPolicy: OnFailure
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: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
command: ["kube-controller-manager"]
args: ["--bind-address=127.0.0.1"]
restartPolicy: OnFailure
Negative test num. 2 - yaml file
apiVersion: v1
kind: Pod
metadata:
name: command-demo
labels:
purpose: demonstrate-command
spec:
containers:
- name: command-demo-container
image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
command: ["kube-controller-manager","--bind-address=127.0.0.1"]
args: []
restartPolicy: OnFailure
Negative test num. 3 - yaml file
apiVersion: v1
kind: Pod
metadata:
labels:
component: kube-scheduler
tier: control-plane
name: kube-scheduler
namespace: kube-system
spec:
selector:
matchLabels:
app: kube-controller-manager
template:
metadata:
labels:
app: kube-controller-manager
containers:
- name: command-demo-container
image: k8s.gcr.io/kube-scheduler:v1.19.0
command: ["kube-scheduler"]
args: ["--bind-address=127.0.0.1"]
restartPolicy: OnFailure
Negative test num. 4 - yaml file
apiVersion: v1
kind: Pod
metadata:
labels:
component: kube-scheduler
tier: control-plane
name: kube-scheduler
namespace: kube-system
spec:
selector:
matchLabels:
app: kube-controller-manager
template:
metadata:
labels:
app: kube-controller-manager
containers:
- name: command-demo-container
image: k8s.gcr.io/kube-scheduler:v1.19.0
command: ["kube-scheduler","--bind-address=127.0.0.1"]
args: []
restartPolicy: OnFailure