# Cis Ubuntu1604 V200 4 1 2 3

> Ensure system is disabled when audit logs are full

- Skill: `cyberstrikeus/cis-ubuntu1604-v200-4-1-2-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1604-v200-4-1-2-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1604-v200-4-1-2-3/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu1604-v200-4-1-2-3

---


# CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 4.1.2.3

## Profile

- **Level:** 2 - Server
- **Level:** 2 - Workstation
- **Assessment Status:** Automated

## Description

The auditd daemon can be configured to halt the system when the audit logs are full.

## Rationale

In high security contexts, the risk of detecting unauthorized access or nonrepudiation exceeds the benefit of the system's availability.

## Impact

If the system is configured to halt when audit logs are full, the system will stop when disk space is exhausted for audit logs.

## Audit Procedure

### Command Line

Run the following commands and verify output matches:

```bash
grep space_left_action /etc/audit/auditd.conf
```

```bash
grep action_mail_acct /etc/audit/auditd.conf
```

```bash
grep admin_space_left_action /etc/audit/auditd.conf
```

## Expected Result

```
space_left_action = email
action_mail_acct = root
admin_space_left_action = halt
```

## Remediation

### Command Line

Set the following parameters in `/etc/audit/auditd.conf`:

```bash
space_left_action = email
action_mail_acct = root
admin_space_left_action = halt
```

## Default Value

By default, auditd does not halt the system when logs are full.

## References

1. CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Section 4.1.2.3

## CIS Controls

| Controls Version | Control                                                                                                                            |
| ---------------- | ---------------------------------------------------------------------------------------------------------------------------------- |
| v7               | 6.4 Ensure adequate storage for logs - Ensure that all systems that store logs have adequate storage space for the logs generated. |