> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/compute/appsec-k8s-18.md).

# Containers share host IPC namespace misconfiguration detected in code

## Rule Details

|                        |                                                        |
| ---------------------- | ------------------------------------------------------ |
| Cortex AppSec Rule ID  | APPSEC\_K8S\_18                                        |
| Category - Subcategory | Kubernetes - Access Control                            |
| Provider               | OTHER                                                  |
| Severity               | MEDIUM                                                 |
| Framework              | Helm, Kubernetes, Kustomize, Terraform, Terraform Plan |

## Impact

Pods share many resources, so it could make sense to share a process namespace. Some container images may expect to be isolated from other containers. Not sharing IPC namespaces helps ensure isolation. Containers in different pods have distinct IP addresses and will need special configuration to communicate by IPC.

## How to Fix

*Resource:* Pod / Deployment / DaemonSet / StatefulSet / ReplicaSet / ReplicationController / Job / CronJob

* *Arguments:* hostIPC (Optional) If true, the Pod uses the host's IPC namespace. Default to false. \[source,go]

***

apiVersion: v1 kind: Pod metadata: name: spec:

* hostIPC: false # or do not include hostIPC

***

apiVersion: batch/v1beta1 kind: CronJob metadata: name: spec: schedule: <> jobTemplate: spec: template: spec:

* hostIPC: false # or do not include hostIPC

***

apiVersion: <> kind: metadata: name: spec: template: spec:

* hostIPC: false # or do not include hostIPC

***


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