| name | cis-ubuntu1804-v220-1-8-1 |
| description | Ensure GNOME Display Manager is removed |
| category | cis-networking |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","gdm","gnome","display-manager"] |
| cis_id | 1.8.1 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
1.8.1 Ensure GNOME Display Manager is removed (Automated)
Profile Applicability
Description
The GNOME Display Manager (GDM) is a program that manages graphical display servers and handles graphical user logins.
Rationale
If a Graphical User Interface (GUI) is not required, it should be removed to reduce the attack surface of the system.
Impact
Removing the GNOME Display manager will remove the Graphical User Interface (GUI) from the system.
Audit Procedure
Command Line
Run the following command and verify gdm3 is not installed:
dpkg-query -s gdm3 &>/dev/null && echo "gdm3 is installed"
Expected Result
Nothing should be returned.
Remediation
Command Line
Run the following command to uninstall gdm3:
apt purge gdm3
References
- NIST SP 800-53 Rev. 5: CM-11
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software | | X | X |
| v7 | 9.2 Ensure Only Approved Ports, Protocols and Services Are Running | | X | X |
MITRE ATT&CK Mappings
| Techniques / Sub-techniques | Tactics | Mitigations |
|---|
| T1543, T1543.002 | TA0002 | M1033 |