Cis Ubuntu1204 V110 6 1

---
name: cis-ubuntu1204-v110-6-1
description: "Ensure the X Window system is not installed"
category: cis-os-hardening
version: "1.1.0"
author: cyberstrike-official
tags: [cis, ubuntu, 12.04, linux, x-window, gui, attack-surface]
cis_id: "6.1"
cis_benchmark: "CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0"
tech_stack: [ubuntu, linux]
cwe_ids: []
chains_with: []
prerequisites: []
severity_boost: {}
---

# 6.1 Ensure the X Window system is not installed (Scored)

## Profile Applicability

- Level 1

## Description

The X Window system provides a Graphical User Interface (GUI) where users can have multiple windows in which to run programs and various add on. The X Window system is typically used on desktops where users login, but not on servers where users typically do not login.

## Rationale

Unless your organization specifically requires graphical login access via X Windows, remove it to reduce the potential attack surface.

## Audit Procedure

### Using Command Line

Run the following command:

```bash
dpkg -l xserver-xorg-core*
```

## Expected Result

Ensure no matching packages are listed as installed.

## Remediation

### Using Command Line

Uninstall X Windows:

```bash
apt-get purge xserver-xorg-core*
```

## Default Value

Not installed by default on Ubuntu 12.04 LTS Server.

## References

- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

## Profile

Level 1 - Scored