# Cis GCP Cos 5.3.1.5

> Ensure all users last password change date is in the past

- Skill: `cyberstrikeus/cis-gcp-cos-5-3-1-5` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-gcp-cos-5-3-1-5`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-gcp-cos-5-3-1-5/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector CAUTION)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-gcp-cos-5-3-1-5

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# 5.3.1.5 Ensure all users last password change date is in the past (Automated)

## Description

All users should have a password change date in the past.

## Rationale

If a users recorded password change date is in the future then they could bypass any set password expiration.

## Audit Procedure

Run the following command and verify nothing is returned:

```bash
# for usr in $(cut -d: -f1 /etc/shadow); do [[ $(chage --list $usr | grep '^Last password change' | cut -d: -f2) > $(date) ]] && echo "$usr :$(chage --list $usr | grep '^Last password change' | cut -d: -f2)"; done
```

## Expected Result

No output should be returned. If any users are listed, their last password change date is set in the future.

## Remediation

Investigate any users with a password change date in the future and correct them. Locking the account, expiring the password, or resetting the password manually may be appropriate.

## CIS Controls

| Controls Version | Control                                                                                                                                                                                                                                    | IG 1 | IG 2 | IG 3 |
| ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---- | ---- | ---- |
| v8               | **5.2 Use Unique Passwords** - Use unique passwords for all enterprise assets. Best practice implementation includes, at a minimum, an 8-character password for accounts using MFA and a 14-character password for accounts not using MFA. | x    | x    | x    |
| v7               | **4.4 Use Unique Passwords** - Where multi-factor authentication is not supported (such as local administrator, root, or service accounts), accounts will use passwords that are unique to that system.                                    |      | x    | x    |

## Profile

- Level 1 - Server