cis-ubuntu2004-v300-2-1-7

name	cis-ubuntu2004-v300-2-1-7
description	Ensure ldap 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	2.1.7
cis_benchmark	CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

2.1.7 Ensure ldap server services are not in use (Automated)

Profile

• Level 1 - Server
• Level 1 - Workstation

Description

The Lightweight Directory Access Protocol (LDAP) was introduced as a replacement for NIS/YP. It is a service that provides a method for looking up information from a central database.

Rationale

If the system will not need to act as an LDAP server, it is recommended that the software be disabled to reduce the potential attack surface.

Audit Procedure

Command Line

Run the following command to verify slapd is not installed:

# dpkg-query -W -f='${binary:Package}\t${Status}\t${db:Status-Status}\n' slapd

If installed, run:

# systemctl is-enabled slapd.service
# systemctl is-active slapd.service

Verify the service is not enabled and not active.

Expected Result

slapd 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 slapd:

# systemctl stop slapd.service
# systemctl mask slapd.service
# apt purge slapd

Default Value

slapd is not installed by default.

References

1. http://www.openldap.org
2. 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