CIS Amazon Linux 2023 Benchmark for Level 1 - Server
Rules and Groups employed by this XCCDF Profile
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Updating Software
The <code>dnf</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool in the <b>System</b> menu, in the <b>Administration...Group -
Ensure gpgcheck Enabled In Main dnf Configuration
The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure dnf to check package signatures before installing them, ensure the ...Rule High Severity -
Account and Access Control
In traditional Unix security, if an attacker gains shell access to a certain login account, they can perform any action or access any file to which that account has access. Therefore, making it mor...Group -
Warning Banners for System Accesses
Each system should expose as little information about itself as possible. <br> <br> System banners, which are typically displayed just before a login prompt, give out information about the s...Group -
Modify the System Login Banner
To configure the system login banner edit <code>/etc/issue</code>. Replace the default text with a message compliant with the local site policy or a legal disclaimer. The DoD required text is ei...Rule Medium Severity -
Modify the System Login Banner for Remote Connections
To configure the system login banner edit <code>/etc/issue.net</code>. Replace the default text with a message compliant with the local site policy or a legal disclaimer. The DoD required text is ...Rule Medium Severity -
Modify the System Message of the Day Banner
To configure the system message banner edit <code>/etc/motd</code>. Replace the default text with a message compliant with the local site policy or a legal disclaimer. The DoD required text is eit...Rule Medium Severity -
Verify Group Ownership of System Login Banner
To properly set the group owner of/etc/issue
, run the command:$ sudo chgrp root /etc/issue
Rule Medium Severity -
Verify Group Ownership of System Login Banner for Remote Connections
To properly set the group owner of/etc/issue.net
, run the command:$ sudo chgrp root /etc/issue.net
Rule Medium Severity -
Verify Group Ownership of Message of the Day Banner
To properly set the group owner of/etc/motd
, run the command:$ sudo chgrp root /etc/motd
Rule Medium Severity -
Verify ownership of System Login Banner
To properly set the owner of/etc/issue
, run the command:$ sudo chown root /etc/issue
Rule Medium Severity -
Verify ownership of System Login Banner for Remote Connections
To properly set the owner of/etc/issue.net
, run the command:$ sudo chown root /etc/issue.net
Rule Medium Severity -
Verify ownership of Message of the Day Banner
To properly set the owner of/etc/motd
, run the command:$ sudo chown root /etc/motd
Rule Medium Severity -
Verify permissions on System Login Banner
To properly set the permissions of/etc/issue
, run the command:$ sudo chmod 0644 /etc/issue
Rule Medium Severity -
Verify permissions on System Login Banner for Remote Connections
To properly set the permissions of/etc/issue.net
, run the command:$ sudo chmod 0644 /etc/issue.net
Rule Medium Severity -
Verify permissions on Message of the Day Banner
To properly set the permissions of/etc/motd
, run the command:$ sudo chmod 0644 /etc/motd
Rule Medium Severity -
Protect Accounts by Configuring PAM
PAM, or Pluggable Authentication Modules, is a system which implements modular authentication for Linux programs. PAM provides a flexible and configurable architecture for authentication, and it sh...Group -
Set Lockouts for Failed Password Attempts
The <code>pam_faillock</code> PAM module provides the capability to lock out user accounts after a number of failed login attempts. Its documentation is available in <code>/usr/share/doc/pam-VERSIO...Group -
Configure the Use of the pam_faillock.so Module in the /etc/pam.d/password-auth File.
The pam_faillock.so module must be loaded in preauth in /etc/pam.d/password-auth.Rule Medium Severity -
Configure the Use of the pam_faillock.so Module in the /etc/pam.d/system-auth File.
The pam_faillock.so module must be loaded in preauth in /etc/pam.d/system-auth.Rule Medium Severity
Node 2
The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.