# Cis Ubuntu1804 V220 4 3 3

> Ensure sudo log file exists

- Skill: `cyberstrikeus/cis-ubuntu1804-v220-4-3-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1804-v220-4-3-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1804-v220-4-3-3/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu1804-v220-4-3-3

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# CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 4.3.3

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Description

`sudo` can use a custom log file.

## Rationale

A sudo log file simplifies auditing of sudo commands.

## Audit Procedure

### Command Line

Run the following command to verify that `sudo` has a custom log file configured:

```bash
grep -rPsi '^\h*Defaults\h+([^#]+,\h*)?logfile\h*=\h*(")?[\/\w]+(")?' /etc/sudoers /etc/sudoers.d/
```

### Expected Result

```
Defaults logfile="/var/log/sudo.log"
```

## Remediation

### Command Line

Edit the file `/etc/sudoers` or a file in `/etc/sudoers.d/` with `visudo` and add the following line:

```bash
Defaults logfile="/var/log/sudo.log"
```

## References

1. NIST SP 800-53 Rev. 5: AU-3, AU-12

## CIS Controls

v8 - 8.5 Collect Detailed Audit Logs - Configure detailed audit logging for enterprise assets containing sensitive data.

v7 - 6.3 Enable Detailed Logging.

## Profile Applicability

- Level 1 - Server
- Level 1 - Workstation

## Assessment Status

Automated