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Guide to the Secure Configuration of Red Hat Enterprise Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Disable System Statistics Reset Service (sysstat)

    The <code>sysstat</code> service resets various I/O and CPU performance statistics to zero in order to begin counting from a fresh state at boot ti...
    Rule Low Severity
    Show

  • 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
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  • Install the cron service

    The Cron service should be installed.
    Rule Medium Severity
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • Disable anacron Service

    The <code>cronie-anacron</code> package, which provides <code>anacron</code> functionality, is installed by default. The <code>cronie-anacron</cod...
    Rule Unknown Severity
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • 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
    Show

  • Verify Owner on cron.monthly

    To properly set the owner of /etc/cron.monthly, run the command: 
    $ sudo chown root /etc/cron.monthly
    Rule Medium Severity
    Show

  • Verify Owner on cron.weekly

    To properly set the owner of /etc/cron.weekly, run the command: 
    $ sudo chown root /etc/cron.weekly
    Rule Medium Severity
    Show

  • Verify Owner on crontab

    To properly set the owner of /etc/crontab, run the command: 
    $ sudo chown root /etc/crontab
    Rule Medium Severity
    Show

  • Verify Permissions on cron.d

    To properly set the permissions of /etc/cron.d, run the command: 
    $ sudo chmod 0700 /etc/cron.d
    Rule Medium Severity
    Show

  • Verify Permissions on cron.daily

    To properly set the permissions of /etc/cron.daily, run the command: 
    $ sudo chmod 0700 /etc/cron.daily
    Rule Medium Severity
    Show

  • Verify Permissions on cron.hourly

    To properly set the permissions of /etc/cron.hourly, run the command: 
    $ sudo chmod 0700 /etc/cron.hourly
    Rule Medium Severity
    Show

  • Verify Permissions on cron.monthly

    To properly set the permissions of /etc/cron.monthly, run the command: 
    $ sudo chmod 0700 /etc/cron.monthly
    Rule Medium Severity
    Show

  • Uninstall the ntpdate package

    ntpdate is a historical ntp synchronization client for unixes. It sould be uninstalled.
    Rule Low Severity
    Show

  • Uninstall the ssl compliant telnet server

    The telnet daemon, even with ssl support, should be uninstalled.
    Rule High Severity
    Show

  • Verify Permissions on cron.weekly

    To properly set the permissions of /etc/cron.weekly, run the command: 
    $ sudo chmod 0700 /etc/cron.weekly
    Rule Medium Severity
    Show

  • Verify Permissions on crontab

    To properly set the permissions of /etc/crontab, run the command: 
    $ sudo chmod 0600 /etc/crontab
    Rule Medium Severity
    Show

  • Restrict at and cron to Authorized Users if Necessary

    The <code>/etc/cron.allow</code> and <code>/etc/at.allow</code> files contain lists of users who are allowed to use <code>cron</code> and at to del...
    Group
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  • Ensure that /etc/at.deny does not exist

    The file /etc/at.deny should not exist. Use /etc/at.allow instead.
    Rule Medium Severity
    Show

  • Ensure that /etc/cron.deny does not exist

    The file /etc/cron.deny should not exist. Use /etc/cron.allow instead.
    Rule Medium Severity
    Show

  • Verify Group Who Owns /etc/at.allow file

    If <code>/etc/at.allow</code> exists, it must be group-owned by <code>root</code>. To properly set the group owner of <code>/etc/at.allow</code>, ...
    Rule Medium Severity
    Show

  • Verify Group Who Owns /etc/cron.allow file

    If <code>/etc/cron.allow</code> exists, it must be group-owned by <code>root</code>. To properly set the group owner of <code>/etc/cron.allow</cod...
    Rule Medium Severity
    Show

  • Verify User Who Owns /etc/cron.allow file

    If <code>/etc/cron.allow</code> exists, it must be owned by <code>root</code>. To properly set the owner of <code>/etc/cron.allow</code>, run the ...
    Rule Medium Severity
    Show

  • Verify Permissions on /etc/at.allow file

    If <code>/etc/at.allow</code> exists, it must have permissions <code>0600</code> or more restrictive. To properly set the permissions of <code>/e...
    Rule Medium Severity
    Show

  • Verify Permissions on /etc/cron.allow file

    If <code>/etc/cron.allow</code> exists, it must have permissions <code>0600</code> or more restrictive. To properly set the permissions of <code>...
    Rule Medium Severity
    Show

  • Deprecated services

    Some deprecated software services impact the overall system security due to their behavior (leak of confidentiality in network exchange, usage as u...
    Group
    Show

  • Uninstall the inet-based telnet server

    The inet-based telnet daemon should be uninstalled.
    Rule High Severity
    Show

  • Uninstall the nis package

    The support for Yellowpages should not be installed unless it is required.
    Rule Low Severity
    Show

  • fapolicyd Must be Configured to Limit Access to Users Home Folders

    fapolicyd needs be configured so that users cannot give access to their home folders to other users.
    Rule Medium Severity
    Show

  • DHCP

    The Dynamic Host Configuration Protocol (DHCP) allows systems to request and obtain an IP address and other configuration parameters from a server....
    Group
    Show

  • Configure DHCP Client if Necessary

    If DHCP must be used, then certain configuration changes can minimize the amount of information it receives and applies from the network, and thus ...
    Group
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  • Minimize the DHCP-Configured Options

    Create the file <code>/etc/dhcp/dhclient.conf</code>, and add an appropriate setting for each of the ten configuration settings which can be obtain...
    Rule Unknown Severity
    Show

  • Configure DHCP Server

    If the system must act as a DHCP server, the configuration information it serves should be minimized. Also, support for other protocols and DNS-upd...
    Group
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  • Configure Logging

    Ensure that the following line exists in <code>/etc/rsyslog.conf</code>: <pre>daemon.* /var/log/daemon.log</pre> Configure logwatch or ot...
    Rule Unknown Severity
    Show

  • Deny BOOTP Queries

    Unless your network needs to support older BOOTP clients, disable support for the bootp protocol by adding or correcting the global option: <pre>de...
    Rule Unknown Severity
    Show

  • Deny Decline Messages

    Edit <code>/etc/dhcp/dhcpd.conf</code> and add or correct the following global option to prevent the DHCP server from responding the DHCPDECLINE me...
    Rule Unknown Severity
    Show

  • Do Not Use Dynamic DNS

    To prevent the DHCP server from receiving DNS information from clients, edit <code>/etc/dhcp/dhcpd.conf</code>, and add or correct the following gl...
    Rule Unknown Severity
    Show

  • Minimize Served Information

    Edit /etc/dhcp/dhcpd.conf. Examine each address range section within the file, and ensure that the following options are not defined unless there i...
    Rule Unknown Severity
    Show

  • Disable DHCP Client

    DHCP is the default network configuration method provided by the system installer, and common on many networks. Nevertheless, manual management of ...
    Group
    Show

  • Disable DHCP Client in ifcfg

    For each interface on the system (e.g. eth0), edit <code>/etc/sysconfig/network-scripts/ifcfg-<i>interface</i></code> and make the following change...
    Rule Unknown Severity
    Show

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