cis-ubuntu1204-v110-6-1

DevOps & Security

Ensure the X Window system is not installed

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Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.1.0/cis-ubuntu1204-v110-6-1/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/cis-ubuntu1204-v110-6-1/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

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:

dpkg -l xserver-xorg-core*

Expected Result

Ensure no matching packages are listed as installed.

Remediation

Using Command Line

Uninstall X Windows:

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