← Back to Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide

V-260547

CAT II (Medium)

Ubuntu 22.04 LTS must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

Rule ID

SV-260547r1015009_rule

STIG

Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-003627 CCI-003628 CCI-000795

Discussion

Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.

Check Content

Verify the account identifiers (individuals, groups, roles, and devices) are disabled after 35 days of inactivity by using the following command:  
  
Check the account inactivity value by performing the following command:  
  
     $ grep INACTIVE /etc/default/useradd  
     INACTIVE=35  
  
If "INACTIVE" is set to "-1" or is not set to "35", is commented out, or is missing, this is a finding.

Fix Text

Configure Ubuntu 22.04 LTS to disable account identifiers after 35 days of inactivity after the password expiration.   
  
Run the following command to change the configuration for adduser:  
  
     $ sudo useradd -D -f 35 
  
Note: DOD recommendation is 35 days, but a lower value is acceptable. The value "0" will disable the account immediately after the password expires.