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pentesting-cloud/gcp-security/gcp-services/gcp-cloud-scheduler-enum.md

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+# GCP - Cloud Scheduler Enum
+
+{% hint style="success" %}
+Learn & practice AWS Hacking:<img src="../../../.gitbook/assets/image (1) (1) (1) (1).png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../../.gitbook/assets/image (1) (1) (1) (1).png" alt="" data-size="line">\
+Learn & practice GCP Hacking: <img src="../../../.gitbook/assets/image (2) (1).png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../../.gitbook/assets/image (2) (1).png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
+
+<details>
+
+<summary>Support HackTricks</summary>
+
+* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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+* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
+
+</details>
+{% endhint %}
+
+## Basic Information
+
+Google Cloud Scheduler is a fully managed **cron job service** that allows you to run arbitrary jobs—such as batch, big data jobs, cloud infrastructure operations—at fixed times, dates, or intervals. It is integrated with Google Cloud services, providing a way to **automate various tasks like updates or batch processing on a regular schedule**.
+
+Although from an offensive point of view this sounds amazing, it actually isn't that interesting because the service just allow to schedule certain simple actions at a certain time and not to execute arbitrary code.
+
+At the moment of this writing these are the actions this service allows to schedule:
+
+<figure><img src="../../../.gitbook/assets/image (347).png" alt="" width="563"><figcaption></figcaption></figure>
+
+* **HTTP**: Send an HTTP request defining the headers and body of the request.
+* **Pub/Sub**: Send a message into an specific topic
+* **App Engine HTTP**: Send an HTTP request to an app built in App Engine
+* **Workflows**: Call a GCP Workflow.
+
+## Service Accounts
+
+A service account is not always required by each scheduler. The **Pub/Sub** and **App Engine HTTP** types don't require any service account. The **Workflow** does require a service account, but it'll just invoke the workflow.\
+Finally, the regular HTTP type doesn't require a service account, but it's possible to indicate that some kind of auth is required by the workflow and add either an **OAuth token or an OIDC token to the sent** HTTP request.
+
+{% hint style="danger" %}
+Therefore, it's possible to steal the **OIDC** token and abuse the **OAuth** token from service accounts **abusing the HTTP type**. More on this in the privilege escalation page.
+{% endhint %}
+
+Note that it's possible to limit the scope of the OAuth token sent, however, by default, it'll be `cloud-platform`.
+
+## Enumeration
+
+```bash
+# Get schedulers in a location
+gcloud scheduler jobs list --location us-central1
+
+# Get information of an specific scheduler
+gcloud scheduler jobs describe --location us-central1 <scheduler-name>
+```
+
+## Privilege Escalation
+
+{% content-ref url="../gcp-privilege-escalation/gcp-cloudscheduler-privesc.md" %}
+[gcp-cloudscheduler-privesc.md](../gcp-privilege-escalation/gcp-cloudscheduler-privesc.md)
+{% endcontent-ref %}
+
+{% hint style="success" %}
+Learn & practice AWS Hacking:<img src="../../../.gitbook/assets/image (1) (1) (1) (1).png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../../.gitbook/assets/image (1) (1) (1) (1).png" alt="" data-size="line">\
+Learn & practice GCP Hacking: <img src="../../../.gitbook/assets/image (2) (1).png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../../.gitbook/assets/image (2) (1).png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
+
+<details>
+
+<summary>Support HackTricks</summary>
+
+* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
+* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
+* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
+
+</details>
+{% endhint %}