Amazon Linux 2023 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.

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.

Satisfies: SRG-OS-000118-GPOS-00060, SRG-OS-000590-GPOS-00110

Verify Amazon Linux 2023 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 set to "-1", a value greater than "35", or is commented out, this is a finding.

Configure Amazon Linux 2023 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

The recommendation is 35 days, but a lower value is acceptable.