Account identifiers (individuals, groups, roles, and devices) must disabled after 35 days of inactivity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-214966	UBTU-16-010280	SV-214966r508033_rule		Medium

Description
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. Ubuntu operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.

Description

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. Ubuntu operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.

STIG	Date
Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide	2020-09-03

Details

Check Text ( C-16165r284766_chk )
Verify the account identifiers (individuals, groups, roles, and devices) are disabled after "35" days of inactivity with the following command: Check the account inactivity value by performing the following command: # sudo grep -i inactive /etc/default/useradd INACTIVE=35 If "INACTIVE" is not set to a value "0<[VALUE]<=35", or is commented out, this is a finding.

Fix Text (F-16163r284767_fix)
Configure the Ubuntu operating system to disable account identifiers after 35 days of inactivity after the password expiration. Run the following command to change the configuration for useradd: # sudo useradd -D -f 35 DoD recommendation is 35 days, but a lower value is acceptable. The value "-1" will disable this feature, and "0" will disable the account immediately after the password expires.

Fix Text (F-16163r284767_fix)

Configure the Ubuntu operating system to disable account identifiers after 35 days of inactivity after the password expiration.

Run the following command to change the configuration for useradd:

# sudo useradd -D -f 35

DoD recommendation is 35 days, but a lower value is acceptable. The value "-1" will disable this feature, and "0" will disable the account immediately after the password expires.