Check: UBTU-20-010409
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010409
(in versions v1 r12 through v1 r1)
Title
The Ubuntu operating system must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity. (Cat II impact)
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 with the following command: Check the account inactivity value by performing the following command: $ sudo grep 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
Configure the Ubuntu operating system to disable account identifiers after 35 days of inactivity since 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.
Additional Identifiers
Rule ID: SV-238330r928525_rule
Vulnerability ID: V-238330
Group Title: SRG-OS-000118-GPOS-00060
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000795 |
The organization manages information system identifiers by disabling the identifier after an organization-defined time period of inactivity. |
Controls
Number | Title |
---|---|
IA-4 |
Identifier Management |