# Day 21

Learning Objectives

* Understand how a larger CI/CD environment operates.
* Explore indirect poisoned pipeline execution (PPE) and how it can be used to exploit Git.
* Apply CI/CD exploitation knowledge to the larger CI/CD environment.

This room is again a very straightforward one with all commands and instructions already given. We just need to follow along and run them.

```
What Linux kernel version is the Jenkins node?
[REDACTED]

Make changes to 'Makefile' and after pushing, run a build.
```

```
What value is found from /var/lib/jenkins/secret.key?
[REDACTED]

Make changes to 'Makefile' and after pushing, run a build.
```
