Guide to the Secure Configuration of Red Hat Enterprise Linux 9
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable the xdm_bind_vnc_tcp_port SELinux Boolean
By default, the SELinux boolean <code>xdm_bind_vnc_tcp_port</code> is disabled. If this setting is enabled, it should be disabled. To disable the ...Rule Medium Severity -
Disable the xdm_exec_bootloader SELinux Boolean
By default, the SELinux boolean <code>xdm_exec_bootloader</code> is disabled. If this setting is enabled, it should be disabled. To disable the <c...Rule Medium Severity -
Disable the xdm_sysadm_login SELinux Boolean
By default, the SELinux boolean <code>xdm_sysadm_login</code> is disabled. If this setting is enabled, it should be disabled. To disable the <code...Rule Medium Severity -
Disable the xdm_write_home SELinux Boolean
By default, the SELinux boolean <code>xdm_write_home</code> is disabled. If this setting is enabled, it should be disabled. To disable the <code>x...Rule Medium Severity -
Disable the xen_use_nfs SELinux Boolean
By default, the SELinux boolean <code>xen_use_nfs</code> is disabled. If this setting is enabled, it should be disabled. To disable the <code>xen_...Rule Medium Severity -
Enable the xend_run_blktap SELinux Boolean
By default, the SELinux boolean <code>xend_run_blktap</code> is enabled. If this setting is disabled, it should be enabled. To enable the <code>xe...Rule Medium Severity -
Enable the xend_run_qemu SELinux Boolean
By default, the SELinux boolean <code>xend_run_qemu</code> is enabled. If this setting is disabled, it should be enabled. To enable the <code>xend...Rule Medium Severity -
Disable the xguest_connect_network SELinux Boolean
By default, the SELinux boolean <code>xguest_connect_network</code> is enabled. This setting should be disabled as guest users should not be able t...Rule Medium Severity -
Disable the xguest_exec_content SELinux Boolean
By default, the SELinux boolean <code>xguest_exec_content</code> is enabled. This setting should be disabled as guest users should not be able to r...Rule Medium Severity -
Disable the xguest_mount_media SELinux Boolean
By default, the SELinux boolean <code>xguest_mount_media</code> is enabled. This setting should be disabled as guest users should not be able to mo...Rule Medium Severity -
Disable the xguest_use_bluetooth SELinux Boolean
By default, the SELinux boolean <code>xguest_use_bluetooth</code> is enabled. This setting should be disabled as guests users should not be able to...Rule Medium Severity -
Disable the xserver_clients_write_xshm SELinux Boolean
By default, the SELinux boolean <code>xserver_clients_write_xshm</code> is disabled. If this setting is enabled, it should be disabled. To disable...Rule Medium Severity -
Disable the xserver_execmem SELinux Boolean
By default, the SELinux boolean <code>xserver_execmem</code> is disabled. If this setting is enabled, it should be disabled. To disable the <code>...Rule Medium Severity -
Disable the xserver_object_manager SELinux Boolean
By default, the SELinux boolean <code>xserver_object_manager</code> is disabled. If this setting is enabled, it should be disabled. To disable the...Rule Medium Severity -
Disable the zabbix_can_network SELinux Boolean
By default, the SELinux boolean <code>zabbix_can_network</code> is disabled. If this setting is enabled, it should be disabled. To disable the <co...Rule Medium Severity -
Disable the zarafa_setrlimit SELinux Boolean
By default, the SELinux boolean <code>zarafa_setrlimit</code> is disabled. If this setting is enabled, it should be disabled. To disable the <code...Rule Medium Severity -
Disable the zebra_write_config SELinux Boolean
By default, the SELinux boolean <code>zebra_write_config</code> is disabled. If this setting is enabled, it should be disabled. To disable the <co...Rule Medium Severity -
Disable the zoneminder_anon_write SELinux Boolean
By default, the SELinux boolean <code>zoneminder_anon_write</code> is disabled. If this setting is enabled, it should be disabled. To disable the ...Rule Medium Severity -
Disable the zoneminder_run_sudo SELinux Boolean
By default, the SELinux boolean <code>zoneminder_run_sudo</code> is disabled. If this setting is enabled, it should be disabled. To disable the <c...Rule Medium Severity -
Services
The best protection against vulnerable software is running less software. This section describes how to review the software which Red Hat Enterpris...Group -
Apport Service
The Apport service provides debugging and crash reporting features on Ubuntu distributions.Group -
APT service configuration
The apt service manage the package management and update of the whole system. Its configuration need to be properly defined to ensure efficient sec...Group -
Avahi Server
The Avahi daemon implements the DNS Service Discovery and Multicast DNS protocols, which provide service and host discovery on a network. It allows...Group -
Configure Avahi if Necessary
If your system requires the Avahi daemon, its configuration can be restricted to improve security. The Avahi daemon configuration file is <code>/et...Group -
SNMP read-write community string
Specify the SNMP community string used for read-write access.Value -
Uninstall avahi-autoipd Server Package
If the system does not need to have an Avahi server which implements the DNS Service Discovery and Multicast DNS protocols, the avahi-autoipd and ...Rule Medium Severity -
Uninstall avahi Server Package
If the system does not need to have an Avahi server which implements the DNS Service Discovery and Multicast DNS protocols, the avahi-autoipd and a...Rule Medium Severity -
Disable Avahi Server Software
Theavahi-daemonservice can be disabled with the following command:$ sudo systemctl mask --now avahi-daemon.service
Rule Medium Severity -
Base Services
This section addresses the base services that are installed on a Red Hat Enterprise Linux 9 default installation which are not covered in other sec...Group -
Disable Cockpit Management Server
The Cockpit Management Server (<code>cockpit</code>) provides a web based login and management framework. The <code>cockpit</code> service can be ...Rule Medium Severity -
Disable KDump Kernel Crash Analyzer (kdump)
The <code>kdump</code> service provides a kernel crash dump analyzer. It uses the <code>kexec</code> system call to boot a secondary kernel ("captu...Rule Medium Severity -
Disable ntpdate Service (ntpdate)
The <code>ntpdate</code> service sets the local hardware clock by polling NTP servers when the system boots. It synchronizes to the NTP servers lis...Rule Low Severity -
Disable Odd Job Daemon (oddjobd)
The <code>oddjobd</code> service exists to provide an interface and access control mechanism through which specified privileged tasks can run tasks...Rule Medium Severity -
Disable Apache Qpid (qpidd)
The <code>qpidd</code> service provides high speed, secure, guaranteed delivery services. It is an implementation of the Advanced Message Queuing ...Rule Low Severity -
Disable Network Router Discovery Daemon (rdisc)
The <code>rdisc</code> service implements the client side of the ICMP Internet Router Discovery Protocol (IRDP), which allows discovery of routers ...Rule Medium Severity -
Disable Red Hat Network Service (rhnsd)
The Red Hat Network service automatically queries Red Hat Network servers to determine whether there are any actions that should be executed, such ...Rule Low Severity -
Cron and At Daemons
The cron and at services are used to allow commands to be executed at a later time. The cron service is required by almost all systems to perform n...Group -
Install the cron service
The Cron service should be installed.Rule Medium Severity -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary mainte...Rule Medium Severity -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary mainte...Rule Medium Severity -
Disable At Service (atd)
The <code>at</code> and <code>batch</code> commands can be used to schedule tasks that are meant to be executed only once. This allows delayed exec...Rule Medium Severity -
Verify Group Who Owns cron.d
To properly set the group owner of/etc/cron.d, run the command:$ sudo chgrp root /etc/cron.d
Rule Medium Severity -
Verify Group Who Owns cron.daily
To properly set the group owner of/etc/cron.daily, run the command:$ sudo chgrp root /etc/cron.daily
Rule Medium Severity -
Verify Group Who Owns cron.hourly
To properly set the group owner of/etc/cron.hourly, run the command:$ sudo chgrp root /etc/cron.hourly
Rule Medium Severity -
Verify Group Who Owns cron.monthly
To properly set the group owner of/etc/cron.monthly, run the command:$ sudo chgrp root /etc/cron.monthly
Rule Medium Severity -
Verify Group Who Owns cron.weekly
To properly set the group owner of/etc/cron.weekly, run the command:$ sudo chgrp root /etc/cron.weekly
Rule Medium Severity -
Verify Group Who Owns Crontab
To properly set the group owner of/etc/crontab, run the command:$ sudo chgrp root /etc/crontab
Rule Medium Severity -
Verify Owner on cron.d
To properly set the owner of/etc/cron.d, run the command:$ sudo chown root /etc/cron.d
Rule Medium Severity -
Verify Owner on cron.daily
To properly set the owner of/etc/cron.daily, run the command:$ sudo chown root /etc/cron.daily
Rule Medium Severity -
Verify Owner on cron.hourly
To properly set the owner of/etc/cron.hourly, run the command:$ sudo chown root /etc/cron.hourly
Rule Medium Severity
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