RHEL 9 /etc/gshadow file must have mode 0000 or less permissive to prevent unauthorized access.

The "/etc/gshadow" file contains group password hashes. Protection of this file is critical for system security.

Verify that the "/etc/gshadow" file has mode "0000" with the following command:

$ sudo stat -c "%a %n" /etc/gshadow

0 /etc/gshadow

If a value of "0" is not returned, this is a finding.

Change the mode of the file "/etc/gshadow" to "0000" by running the following command:

$ sudo chmod 0000 /etc/gshadow