# Cis Ubuntu1204 V110 8 1 18

> Make the Audit Configuration Immutable

- Skill: `cyberstrikeus/cis-ubuntu1204-v110-8-1-18` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1204-v110-8-1-18`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1204-v110-8-1-18/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-ubuntu1204-v110-8-1-18

---


# 8.1.18 Make the Audit Configuration Immutable (Scored)

## Profile Applicability

- Level 2

## Description

Set system audit so that audit rules cannot be modified with `auditctl`. Setting the flag "-e 2" forces audit to be put in immutable mode. Audit changes can only be made on system reboot.

## Rationale

In immutable mode, unauthorized users cannot execute changes to the audit system to potentially hide malicious activity and then put the audit rules back. Users would most likely notice a system reboot and that could alert administrators of an attempt to make unauthorized audit changes.

## Audit Procedure

### Using Command Line

Perform the following to determine if the audit configuration is immutable.

```bash
tail -n 1 /etc/audit/audit.rules
```

## Expected Result

```
-e 2
```

## Remediation

### Using Command Line

Add the following lines to the `/etc/audit/audit.rules` file:

```bash
-e 2
```

**Note:** This must be the last line in the `/etc/audit/audit.rules` file.

## Default Value

By default, the audit configuration is not immutable.

## References

- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

## Profile

Level 2 - Scored