cis-ubuntu1204-v110-4-3

DevOps & Security

Enable Randomized Virtual Memory Region Placement

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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.1.0/cis-ubuntu1204-v110-4-3/SKILL.md

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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:

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