Vulnerability Discussion

The "/etc/passwd" file contains information about the users that are configured on the system. Protection of this file is critical for system security.

Check

Verify the group ownership of the "/etc/passwd" file with the following command:

$ sudo stat -c "%G %n" /etc/passwd

root /etc/passwd

If "/etc/passwd" file does not have a group owner of "root", this is a finding.

Fix

Change the group of the file /etc/passwd to root by running the following command:

$ sudo chgrp root /etc/passwd