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Guide to the Secure Configuration of Oracle Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SAP Specific Requirement

    SAP (Systems, Applications and Products in Data Processing) is enterprise software to manage business operations and customer relations. The follow...
    Group
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  • Sudo

    <code>Sudo</code>, which stands for "su 'do'", provides the ability to delegate authority to certain users, groups of users, or system administrato...
    Group
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  • Group name dedicated to the use of sudo

    Specify the name of the group that should own /usr/bin/sudo.
    Value
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  • Sudo - logfile value

    Specify the sudo logfile to use. The default value used here matches the example location from CIS, which uses /var/log/sudo.log.
    Value
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  • Sudo - passwd_timeout value

    Defines the number of minutes before the <code>sudo</code> password prompt times out. Defining 0 means no timeout. The default timeout value is 5 m...
    Value
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  • Install sudo Package

    The sudo package can be installed with the following command: 
    $ sudo yum install sudo
    Rule Medium Severity
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  • Ensure Privileged Escalated Commands Cannot Execute Other Commands - sudo NOEXEC

    The sudo <code>NOEXEC</code> tag, when specified, prevents user executed commands from executing other commands, like a shell for example. This sho...
    Rule High Severity
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  • Ensure Only Users Logged In To Real tty Can Execute Sudo - sudo requiretty

    The sudo <code>requiretty</code> tag, when specified, will only execute sudo commands from users logged in to a real tty. This should be enabled by...
    Rule Medium Severity
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  • Ensure Only Users Logged In To Real tty Can Execute Sudo - sudo use_pty

    The sudo <code>use_pty</code> tag, when specified, will only execute sudo commands from users logged in to a real tty. This should be enabled by ma...
    Rule Medium Severity
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  • Ensure Sudo Logfile Exists - sudo logfile

    A custom log sudo file can be configured with the 'logfile' tag. This rule configures a sudo custom logfile at the default location suggested by CI...
    Rule Low Severity
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  • Ensure Users Re-Authenticate for Privilege Escalation - sudo !authenticate

    The sudo <code>!authenticate</code> option, when specified, allows a user to execute commands using sudo without having to authenticate. This shoul...
    Rule Medium Severity
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  • Ensure Users Re-Authenticate for Privilege Escalation - sudo NOPASSWD

    The sudo <code>NOPASSWD</code> tag, when specified, allows a user to execute commands using sudo without having to authenticate. This should be dis...
    Rule Medium Severity
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  • Ensure Users Re-Authenticate for Privilege Escalation - sudo

    The sudo <code>NOPASSWD</code> and <code>!authenticate</code> option, when specified, allows a user to execute commands using sudo without having t...
    Rule Medium Severity
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  • Require Re-Authentication When Using the sudo Command

    The sudo <code>timestamp_timeout</code> tag sets the amount of time sudo password prompt waits. The default <code>timestamp_timeout</code> value is...
    Rule Medium Severity
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  • The operating system must restrict privilege elevation to authorized personnel

    The sudo command allows a user to execute programs with elevated (administrator) privileges. It prompts the user for their password and confirms yo...
    Rule Medium Severity
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  • 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
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  • Only the VDSM User Can Use sudo NOPASSWD

    The sudo <code>NOPASSWD</code> tag, when specified, allows a user to execute commands using sudo without having to authenticate. Only the <code>vds...
    Rule Medium Severity
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  • Explicit arguments in sudo specifications

    All commands in the sudoers file must strictly specify the arguments allowed to be used for a given user. If the command is supposed to be executed...
    Rule Medium Severity
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  • Don't define allowed commands in sudoers by means of exclusion

    Policies applied by sudo through the sudoers file should not involve negation. Each user specification in the <code>sudoers</code> file contains a...
    Rule Medium Severity
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  • Don't target root user in the sudoers file

    The targeted users of a user specification should be, as much as possible, non privileged users (i.e.: non-root). User specifications have to expl...
    Rule Medium Severity
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  • Ensure invoking users password for privilege escalation when using sudo

    The sudoers security policy requires that users authenticate themselves before they can use sudo. When sudoers requires authentication, it validate...
    Rule Medium Severity
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  • System Tooling / Utilities

    The following checks evaluate the system for recommended base packages -- both for installation and removal.
    Group
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  • Ensure gnutls-utils is installed

    The gnutls-utils package can be installed with the following command: 
    $ sudo yum install gnutls-utils
    Rule Medium Severity
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  • Ensure nss-tools is installed

    The nss-tools package can be installed with the following command: 
    $ sudo yum install nss-tools
    Rule Medium Severity
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  • Install openscap-scanner Package

    The openscap-scanner package can be installed with the following command: 
    $ sudo yum install openscap-scanner
    Rule Medium Severity
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  • Install rear Package

    The rear package can be installed with the following command: 
    $ sudo yum install rear
    Rule Medium Severity
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  • Install rng-tools Package

    The rng-tools package can be installed with the following command: 
    $ sudo yum install rng-tools
    Rule Low Severity
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  • Install scap-security-guide Package

    The scap-security-guide package can be installed with the following command: 
    $ sudo yum install scap-security-guide
    Rule Medium Severity
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  • Uninstall gssproxy Package

    The gssproxy package can be removed with the following command: 
    $ sudo yum erase gssproxy
    Rule Medium Severity
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  • Uninstall iprutils Package

    The iprutils package can be removed with the following command: 
    $ sudo yum erase iprutils
    Rule Medium Severity
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  • Uninstall krb5-workstation Package

    The krb5-workstation package can be removed with the following command: 
    $ sudo yum erase krb5-workstation
    Rule Medium Severity
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  • Uninstall tuned Package

    The tuned package can be removed with the following command: 
    $ sudo yum erase tuned
    Rule Medium Severity
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  • Updating Software

    The <code>yum</code> command line tool is used to install and update software packages. The system also provides a graphical software update tool i...
    Group
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  • Install dnf-automatic Package

    The dnf-automatic package can be installed with the following command: 
    $ sudo yum install dnf-automatic
    Rule Medium Severity
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  • Ensure yum Removes Previous Package Versions

    <code>yum</code> should be configured to remove previous software components after new versions have been installed. To configure <code>yum</code> ...
    Rule Low Severity
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  • Configure dnf-automatic to Install Available Updates Automatically

    To ensure that the packages comprising the available updates will be automatically installed by <code>dnf-automatic</code>, set <code>apply_updates...
    Rule Medium Severity
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  • Configure dnf-automatic to Install Only Security Updates

    To configure <code>dnf-automatic</code> to install only security updates automatically, set <code>upgrade_type</code> to <code>security</code> unde...
    Rule Low Severity
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  • Ensure gpgcheck Enabled In Main yum Configuration

    The <code>gpgcheck</code> option controls whether RPM packages' signatures are always checked prior to installation. To configure yum to check pack...
    Rule High Severity
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  • An SELinux Context must be configured for the pam_faillock.so records directory

    The <code>dir</code> configuration option in PAM pam_faillock.so module defines where the lockout records is stored. The configured directory must ...
    Rule Medium Severity
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  • Ensure gpgcheck Enabled for Local Packages

    <code>yum</code> should be configured to verify the signature(s) of local packages prior to installation. To configure <code>yum</code> to verify s...
    Rule High Severity
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  • Ensure gpgcheck Enabled for All yum Package Repositories

    To ensure signature checking is not disabled for any repos, remove any lines from files in <code>/etc/yum.repos.d</code> of the form: <pre>gpgcheck...
    Rule High Severity
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  • Ensure Oracle Linux GPG Key Installed

    To ensure the system can cryptographically verify base software packages come from Oracle (and to connect to the Unbreakable Linux Network to recei...
    Rule High Severity
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  • Ensure Software Patches Installed

    If the system is joined to the ULN or a yum server, run the following command to install updates: <pre>$ sudo yum update</pre> If the system is no...
    Rule Medium Severity
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  • Enable dnf-automatic Timer

    The dnf-automatic timer can be enabled with the following command: 
    $ sudo systemctl enable dnf-automatic.timer
    Rule Medium Severity
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  • 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...
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  • Authselect profile

    Specify the authselect profile to select
    Value
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  • Enable authselect

    Configure user authentication setup to use the <code>authselect</code> tool. If authselect profile is selected, the rule will enable the <xccdf-1.2...
    Rule Medium Severity
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  • 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 logi...
    Group
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  • Login Banner Verbiage

    Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters ...
    Value
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  • MotD Banner Verbiage

    Enter an appropriate login banner for your organization. Please note that new lines must be expressed by the '\n' character and special characters ...
    Value
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