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CIS Ubuntu 14.04 LTS - 2.3.5 Ensure LDAP client is not installed

DevOps & Security
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Verify that the LDAP client (ldap-utils) package is not installed

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How to use this skill

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  3. Review the proposed files and risks before you approve installation.
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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_Linux_14.04_LTS_Benchmark_v2.1.0/cis-ubuntu1404-v210-2-3-5/SKILL.md

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2.3.5 Ensure LDAP client is not installed (Scored)

Profile Applicability

  • 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 client, it is recommended that the software be removed to reduce the potential attack surface.

Audit Procedure

Run the following command and verify ldap-utils is not installed:

dpkg -s ldap-utils

Expected Result

The command should indicate that the package is not installed (e.g., dpkg-query: package 'ldap-utils' is not installed).

Remediation

Uninstall ldap-utils using the appropriate package manager or manual installation:

apt-get remove ldap-utils

Default Value

ldap-utils is not installed by default.

Impact

Removing the LDAP client will prevent or inhibit using LDAP for authentication in your environment.

References

  • CIS Controls: 2 Inventory of Authorized and Unauthorized Software

Profile

  • Level 1 - Server
  • Level 1 - Workstation