hacktricks/pentesting/pentesting-kubernetes/enumeration-from-a-pod.md

# Enumeration from a Pod

In a situation where you have managed to break into a Kubernetes Pod you could start enumerating the kubernetes environment from within.

## Service Account Tokens

Before continuing, if you don't know what is a service in Kubernetes I would suggest you to [**follow this link and read at least the information about Kubernetes architecture**](./#architecture)**.**

**ServiceAccount** is an object managed by Kubernetes and used to provide an identity for processes that run in a pod.  
Every service account has a secret related to it and this secret contains a bearer token. This is a JSON Web Token \(JWT\), a method for representing claims securely between two parties.

Usually in the directory `/run/secrets/kubernetes.io/serviceaccount` or `/var/run/secrets/kubernetes.io/serviceaccount` you can find the files:

* **ca.crt**: It's the ca certificate to check kubernetes communications
* **namespace**: It indicates the current namespace
* **token**: It contains the **service token** of the current pod.

The service account token is being signed by the key residing in the file **sa.key** and validated by **sa.pub**.

Default location on **Kubernetes**:

* /etc/kubernetes/pki

Default location on **Minikube**:

* /var/lib/localkube/certs

Taken from the Kubernetes [documentation](https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/#use-the-default-service-account-to-access-the-api-server):

_“When you create a pod, if you do not specify a service account, it is automatically assigned the_ default _service account in the same namespace.”_

### Hot Pods

_**Hot pods are**_ pods containing a privileged service account token. A privileged service account token is a token that has permission to do privileged tasks such as listing secrets, creating pods, etc.

## RBAC

If you don't know what is **RBAC**, [**read this section**](./#cluster-hardening-rbac).

## Enumeration CheatSheet

To enumerate the environment you can upload the [**kubectl**](https://kubernetes.io/es/docs/tasks/tools/install-kubectl/) binary and use it. Also, using the **service** **token** obtained before you can manually access some endpoints of the **API Server**.  
In order to find the the IP of the API service check the environment for a variable called `KUBERNETES_SERVICE_HOST`.

### Get namespaces

{% tabs %}
{% tab title="kubectl" %}
```bash
./kubectl get namespaces
```
{% endtab %}

{% tab title="API" %}
```bash
curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/
```
{% endtab %}
{% endtabs %}

### Get Current Privileges

{% tabs %}
{% tab title="kubectl" %}
```bash
./kubectl auth can-i --list #Get privileges in current namespace
./kubectl auth can-i --list -n custnamespace #Get privileves in custnamespace
```
{% endtab %}
{% endtabs %}

**Once you know which privileges** you have, check the following page to figure out **if you can abuse them** to escalate privileges:

{% page-ref page="hardening-roles-clusterroles.md" %}

### Get Current Context

{% tabs %}
{% tab title="Kubectl" %}
```text
kubectl config current-context
```
{% endtab %}
{% endtabs %}

### Get/List secrets

{% tabs %}
{% tab title="kubectl" %}
```text
./kubectl get secrets -o yaml
./kubectl get secrets -o yaml -n custnamespace

./kubectl list secrets -o yaml
./kubectl list secrets -o yaml -n custnamespace
```
{% endtab %}

{% tab title="API" %}
```bash
curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/default/secrets/

curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/custnamespace/secrets/
```
{% endtab %}
{% endtabs %}

### Get deployments

{% tabs %}
{% tab title="kubectl" %}
```text
./kubectl get deployments
./kubectl get deployments -n custnamespace
```
{% endtab %}

{% tab title="API" %}
```bash
curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/default/deployments/

curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/custnamespace/deployments/
```
{% endtab %}
{% endtabs %}

### Get pods

{% tabs %}
{% tab title="kubectl" %}
```text
./kubectl get pods
./kubectl get pods -n custnamespace
```
{% endtab %}

{% tab title="API" %}
```bash
curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/default/pods/

curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/namespaces/custnamespace/pods/
```
{% endtab %}
{% endtabs %}

### Get nodes

{% tabs %}
{% tab title="kubectl" %}
```text
./kubectl get nodes
```
{% endtab %}

{% tab title="API" %}
```bash
curl -v -H "Authorization: Bearer <jwt_token>" \
https://<Kubernetes_API_IP>:<port>/api/v1/nodes/
```
{% endtab %}
{% endtabs %}

### Get "all"

{% tabs %}
{% tab title="kubectl" %}
```text
./kubectl get all
```
{% endtab %}
{% endtabs %}

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