| name | cis-ubuntu2004-v300-2-1-4 |
| description | Ensure dns server services are not in use |
| category | cis-networking |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","services"] |
| cis_id | 2.1.4 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
2.1.4 Ensure dns server services are not in use (Automated)
Profile
- Level 1 - Server
- Level 1 - Workstation
Description
The Domain Name System (DNS) is a hierarchical naming system that maps names to IP addresses for computers, services and other resources connected to a network.
Rationale
Unless a system is specifically designated to act as a DNS server, it is recommended that the service be disabled to reduce the potential attack surface.
Audit Procedure
Command Line
Run the following command to verify bind9 is not installed:
If installed, run:
Verify the service is not enabled and not active.
Expected Result
bind9 should not be installed, or if installed, the service should be stopped and masked.
Remediation
Command Line
Run the following commands to stop, mask, and purge bind9:
Default Value
bind9 is not installed by default.
References
- NIST SP 800-53 Rev. 5: CM-7
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: T1203, T1210, T1543, T1543.002 | TA0008 | M1042