Check: UBTU-20-010463
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010463
(in versions v1 r12 through v1 r5)
Title
The Ubuntu operating system must not allow accounts configured with blank or null passwords. (Cat I impact)
Discussion
If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.
Check Content
To verify that null passwords cannot be used, run the following command: $ grep nullok /etc/pam.d/common-password If this produces any output, it may be possible to log on with accounts with empty passwords. If null passwords can be used, this is a finding.
Fix Text
If an account is configured for password authentication but does not have an assigned password, it may be possible to log on to the account without authenticating. Remove any instances of the "nullok" option in "/etc/pam.d/common-password" to prevent logons with empty passwords.
Additional Identifiers
Rule ID: SV-251504r832977_rule
Vulnerability ID: V-251504
Group Title: SRG-OS-000480-GPOS-00227
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |