# Cis Ubuntu1804 V220 5 2 2 3

> Configure the system to halt when audit logs are full to prevent data loss

- Skill: `cyberstrikeus/cis-ubuntu1804-v220-5-2-2-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1804-v220-5-2-2-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1804-v220-5-2-2-3/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-ubuntu1804-v220-5-2-2-3

---


# CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0

## Control 5.2.2.3 - Ensure system is disabled when audit logs are full (Automated)

### Profile Applicability

- Level 2 - Server
- Level 2 - Workstation

### 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.

### Audit

Run the following commands and verify output matches:

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

**Expected Output:**

```
space_left_action = email
```

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

**Expected Output:**

```
action_mail_acct = root
```

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

**Expected Output:**

```
admin_space_left_action = halt
```

### Remediation

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

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

### References

- NIST SP 800-53 Rev. 5: AU-5

### CIS Controls

- v8 8.3 Ensure Adequate Audit Log Storage - Ensure that logging destinations maintain adequate storage to comply with the enterprise's audit log management process.
- v7 6.4 Ensure adequate storage for logs - Ensure that all systems that store logs have adequate storage space for the logs generated.

### MITRE ATT&CK Mappings

- Techniques: T1562, T1562.006
- Tactics: TA0040 (Impact)
- Mitigations: M1047 (Audit)

### Benchmark

CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0

### Automation Status

Automated