# Cis Ubuntu1204 V110 4 3

> Enable Randomized Virtual Memory Region Placement

- Skill: `cyberstrikeus/cis-ubuntu1204-v110-4-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1204-v110-4-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1204-v110-4-3/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-ubuntu1204-v110-4-3

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# 4.3 Enable Randomized Virtual Memory Region Placement (Scored)

## Profile Applicability

- Level 1

## Description

Set the system flag to force randomized virtual memory region placement.

## Rationale

Randomly placing virtual memory regions will make it difficult to write memory page exploits as the memory placement will be consistently shifting.

## Audit Procedure

### Using Command Line

Perform the following to determine if virtual memory is randomized:

```bash
sysctl kernel.randomize_va_space
```

## Expected Result

The output should be: `kernel.randomize_va_space = 2`

## Remediation

### Using Command Line

Add the following line to the `/etc/sysctl.conf` file:

```
kernel.randomize_va_space = 2
```

## Default Value

By default, `kernel.randomize_va_space` is set to 2 on Ubuntu 12.04.

## References

- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

## Profile

Level 1 - Scored