> 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/iam/appsec-gcp-13.md).

# GCP Kubernetes engine clusters have client certificate disabled misconfiguration detected in code

## GCP Kubernetes engine clusters have client certificate disabled misconfiguration detected in code

### Rule Details

|                        |                                       |
| ---------------------- | ------------------------------------- |
| Cortex AppSec Rule ID  | APPSEC\_GCP\_13                       |
| Category - Subcategory | Kubernetes - Native Security Controls |
| Provider               | GCP                                   |
| Severity               | LOW                                   |
| Framework              | Terraform, Terraform Plan             |

### Impact

Kubernetes uses client certificates, bearer tokens, an authenticating proxy, HTTP basic auth or OAuth app to authenticate API requests through authentication plugins. As HTTP requests are made to the API server, plugins attempt to associate the following attributes with the request. We recommend you ensure Kubernetes engine clusters are authenticated using OAuth method and not using client certificates as before after service latest upgrade.

### How to Fix

### \[source,go]

{ "resource "google\_container\_cluster" "primary" { name = "marcellus-wallace" location = "us-central1-a" initial\_node\_count = 3 master\_auth { client\_certificate\_config { issue\_client\_certificate = false }

} node\_config {

## Google recommends custom service accounts that have cloud-platform scope and permissions granted via IAM Roles.

service\_account = google\_service\_account.default.email oauth\_scopes = \[ "<https://www.googleapis.com/auth/cloud-platform>" ] labels = { foo = "bar" }

tags = \["foo", "bar"] }

timeouts { create = "30m" update = "40m" }

### } ", }


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/iam/appsec-gcp-13.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.