CIS Red Hat Enterprise Linux 9 Benchmark for Level 2 - Server
Rules and Groups employed by this XCCDF Profile
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Disable X Windows
Unless there is a mission-critical reason for the system to run a graphical user interface, ensure X is not set to start automatically at boot and remove the X Windows software packages. There is u...Group -
Remove the X Windows Package Group
By removing the xorg-x11-server-common package, the system no longer has X Windows installed. If X Windows is not installed then the system cannot boot into graphical user mode. This prevents the s...Rule Medium Severity -
Disable X Windows Startup By Setting Default Target
Systems that do not require a graphical user interface should only boot by default into <code>multi-user.target</code> mode. This prevents accidental booting of the system into a <code>graphical.ta...Rule Medium Severity -
Ensure that /etc/cron.allow exists
The file/etc/cron.allowshould exist and should be used instead of/etc/cron.deny.Rule Medium Severity -
User Initialization Files Must Be Group-Owned By The Primary Group
Change the group owner of interactive users files to the group found in <pre>/etc/passwd</pre> for the user. To change the group owner of a local interactive user home directory, use the following ...Rule Medium Severity -
User Initialization Files Must Be Owned By the Primary User
Set the owner of the user initialization files for interactive users to the primary owner with the following command: <pre>$ sudo chown <i>USER</i> /home/<i>USER</i>/.*</pre> This rule ensures eve...Rule Medium Severity -
Install systemd-journal-remote Package
Journald (via systemd-journal-remote ) supports the ability to send log events it gathers to a remote log host or to receive messages from remote hosts, thus enabling centralised log management.Rule Medium Severity -
Disable Bluetooth Service
The <code>bluetooth</code> service can be disabled with the following command: <pre>$ sudo systemctl mask --now bluetooth.service</pre> <pre>$ sudo service bluetooth stop</pre> ...Rule Medium Severity -
Verify Permissions and Ownership of Old Passwords File
To properly set the owner of <code>/etc/security/opasswd</code>, run the command: <pre>$ sudo chown root /etc/security/opasswd </pre> To properly set the group owner of <code>/etc/security/opasswd...Rule Medium Severity -
Verify Group Who Owns /etc/shells File
To properly set the group owner of/etc/shells, run the command:$ sudo chgrp root /etc/shells
Rule Medium Severity -
Verify Who Owns /etc/shells File
To properly set the owner of/etc/shells, run the command:$ sudo chown root /etc/shells
Rule Medium Severity -
Verify Permissions on /etc/shells File
To properly set the permissions of/etc/shells, run the command:$ sudo chmod 0644 /etc/shells
Rule Medium Severity -
Use Only Strong Key Exchange algorithms
Limit the Key Exchange to strong algorithms. The following line in <code>/etc/ssh/sshd_config</code> demonstrates use of those: <pre>KexAlgorithms <xccdf-1.2:sub idref="xccdf_org.ssgproject.content...Rule Medium Severity -
Use Only Strong MACs
Limit the MACs to strong hash algorithms. The following line in <code>/etc/ssh/sshd_config</code> demonstrates use of those MACs: <pre>MACs <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_...Rule Medium Severity -
Ensure the audit-libs package as a part of audit Subsystem is Installed
The audit-libs package should be installed.Rule Medium Severity -
Record Events that Modify the System's Network Environment
If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default), add the following line to a file with suffix <cod...Rule Medium Severity
Node 2
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