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V-770

CAT I (High)

The system must not have accounts configured with blank or null passwords.

Rule ID

SV-44860r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000366

Discussion

If an account is configured for password authentication but does not have an assigned password, it may be possible to log into the account without authentication. If the root user is configured without a password, the entire system may be compromised. For user accounts not using password authentication, the account must be configured with a password lock value instead of a blank or null value.

Check Content

Verify the system will not log in accounts with blank passwords.
# grep nullok /etc/pam.d/common-auth
# grep nullok /etc/pam.d/common-account
# grep nullok /etc/pam.d/common-password
# grep nullok /etc/pam.d/common-session
If an entry for nullok is found, this is a finding on Linux.

Fix Text

Edit /etc/pam.d/<configuration file> and remove the "nullok" setting.

OR

Use ‘pam-config’ to configure the affected module if it is supported by pam-config