Level 1 - Server Level 1 - Workstation
The /etc/group- file contains a backup list of all the valid groups defined in the system.
It is critical to ensure that the /etc/group- file is protected from unauthorized access. Although it is protected by default, the file permissions could be changed either inadvertently or through malicious actions..
Run the following command and verify Uid and Gid are both 0/root and Access is 600:
# stat /etc/group- Access: (0600/-rw-------) Uid: ( 0/ root) Gid: ( 0/ root)
Run the following command to set permissions on /etc/group-:
# chown root:root /etc/group- # chmod 600 /etc/group-