1.7.2 Ensure local login warning banner is configured properly

[scfast]

Profile Applicability:  Level 1 - Server  Level 1 - Workstation

Description: The contents of the /etc/issue file are displayed to users prior to login for local terminals. Unix-based systems have typically displayed information about the OS release and patch level upon logging in to the system. This information can be useful to developers who are developing software for a particular OS platform. If mingetty(8) supports the following options, they display operating system information: \m - machine architecture \r - operating system release \s - operating system name \v - operating system version

• or the operating system's name

Rationale: Warning messages inform users attempting to log in to the system of their legal status regarding the system and must include the name of the organization that owns the system and any monitoring policies in place. Displaying OS and patch level information in login banners also has the side effect of providing detailed system information to attackers attempting to target specific exploits of a system. Authorized users can easily get this information by running the " uname -a " command once they have logged in.

Audit: Run the following command and verify that the contents match site policy:

# cat /etc/issue

Run the following command and verify no results are returned:

# grep -E -i "(\\\v|\\\r|\\\m|\\\s|$(grep '^ID=' /etc/os-release | cut -d= -
f2 | sed -e 's/"//g'))" /etc/issue