Cis Ubuntu1404 V210 4 1 5

---
name: "CIS Ubuntu 14.04 LTS - 4.1.5 Ensure events that modify user/group information are collected"
description: "Collect audit events for modifications to user and group identity files"
category: "cis-os-hardening"
version: "2.1.0"
author: "cyberstrike-official"
tags:
  - cis
  - ubuntu
  - ubuntu-14.04
  - level-2
  - scored
  - auditd
  - identity
  - logging
cis_id: "4.1.5"
cis_benchmark: "CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0"
tech_stack:
  - ubuntu
  - linux
cwe_ids: []
chains_with: []
prerequisites: []
severity_boost: "medium"
---

# 4.1.5 Ensure events that modify user/group information are collected (Scored)

## Profile Applicability

- Level 2 - Server
- Level 2 - Workstation

## Description

Record events affecting the `group`, `passwd` (user IDs), `shadow` and `gshadow` (passwords) or `/etc/security/opasswd` (old passwords, based on remember parameter in the PAM configuration) files. The parameters in this section will watch the files to see if they have been opened for write or have had attribute changes (e.g. permissions) and tag them with the identifier "identity" in the audit log file.

## Rationale

Unexpected changes to these files could be an indication that the system has been compromised and that an unauthorized user is attempting to hide their activities or compromise additional accounts.

## Audit Procedure

Run the following commands:

```bash
grep identity /etc/audit/audit.rules
auditctl -l | grep identity
```

## Expected Result

Verify output of both matches:

```
-w /etc/group -p wa -k identity
-w /etc/passwd -p wa -k identity
-w /etc/gshadow -p wa -k identity
-w /etc/shadow -p wa -k identity
-w /etc/security/opasswd -p wa -k identity
```

## Remediation

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

```bash
-w /etc/group -p wa -k identity
-w /etc/passwd -p wa -k identity
-w /etc/gshadow -p wa -k identity
-w /etc/shadow -p wa -k identity
-w /etc/security/opasswd -p wa -k identity
```

**Notes:** Reloading the auditd config to set active settings may require a system reboot.

## Default Value

Not configured by default.

## References

1. CIS Controls v6.1 - 5.4 Log Administrative User Addition And Removal

## Profile

- Level 2 - Server
- Level 2 - Workstation