CIS Ubuntu 14.04 LTS - 5.4.1.4 Ensure inactive password lock is 30 days or less

DevOps & Security

Verify inactive password lock is set to 30 days or less to disable dormant accounts

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5.4.1.4 Ensure inactive password lock is 30 days or less (Scored)

Profile Applicability

Level 1 - Server
Level 1 - Workstation

Description

User accounts that have been inactive for over a given period of time can be automatically disabled. It is recommended that accounts that are inactive for 30 days after password expiration be disabled.

Rationale

Inactive accounts pose a threat to system security since the users are not logging in to notice failed login attempts or other anomalies.

Audit Procedure

Run the following command and verify INACTIVE is 30 or less:

useradd -D | grep INACTIVE

Verify all users with a password have Password inactive no more than 30 days after password expires:

egrep ^[^:]+:[^\!*] /etc/shadow | cut -d: -f1
chage --list <user>

Expected Result

INACTIVE=30
Password inactive                                      : <date>

Remediation

Run the following command to set the default password inactivity period to 30 days:

useradd -D -f 30

Modify user parameters for all users with a password set to match:

chage --inactive 30 <user>

Default Value

INACTIVE=-1 (disabled)

References

CIS Controls: 16 - Account Monitoring and Control

Profile

Level 1 - Server
Level 1 - Workstation