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Guide to the Secure Configuration of Oracle Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Minimize Software to Minimize Vulnerability

    The simplest way to avoid vulnerabilities in software is to avoid installing that software. On Oracle Linux 8,the RPM Package Manager (originally R...
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  • Run Different Network Services on Separate Systems

    Whenever possible, a server should be dedicated to serving exactly one network service. This limits the number of other services that can be compro...
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  • Configure Security Tools to Improve System Robustness

    Several tools exist which can be effectively used to improve a system's resistance to and detection of unknown attacks. These tools can improve rob...
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  • How to Use This Guide

    Readers should heed the following points when using the guide.
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  • Formatting Conventions

    Commands intended for shell execution, as well as configuration file text, are featured in a <code>monospace font</code>. <i>Italics</i> are used t...
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  • Read Sections Completely and in Order

    Each section may build on information and recommendations discussed in prior sections. Each section should be read and understood completely; instr...
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  • Reboot Required

    A system reboot is implicitly required after some actions in order to complete the reconfiguration of the system. In many cases, the changes will n...
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  • Root Shell Environment Assumed

    Most of the actions listed in this document are written with the assumption that they will be executed by the root user running the <code>/bin/bash...
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  • Test in Non-Production Environment

    This guidance should always be tested in a non-production environment before deployment. This test environment should simulate the setup in which t...
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  • System Must Avoid Meltdown and Spectre Exploit Vulnerabilities in Modern Processors

    Verify that Meltdown mitigations are not disabled: 
    $ sudo grubby --info=ALL | grep mitigations
    The mitigations must not be set to "off".
    Rule Medium Severity
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  • Verify File Hashes with RPM

    Without cryptographic integrity protections, system executables and files can be altered by unauthorized users without detection. The RPM package m...
    Rule High Severity
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  • Verify and Correct Ownership with RPM

    The RPM package management system can check file ownership permissions of installed software packages, including many that are important to system ...
    Rule High Severity
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  • Verify and Correct File Permissions with RPM

    The RPM package management system can check file access permissions of installed software packages, including many that are important to system sec...
    Rule High Severity
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  • Configure SSH Client to Use FIPS 140-2 Validated MACs: openssh.config

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. OpenSSH is supported by system crypto policy, but the ...
    Rule Medium Severity
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  • Restrict unprivileged access to the kernel syslog

    Enforce restrictions on unprivileged users reading the kernel syslog via dmesg(8). The configuration that was used to build kernel is available at...
    Rule Medium Severity
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  • Configure SSH Server to Use FIPS 140-2 Validated MACs: opensshserver.config

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. OpenSSH is supported by system crypto policy, but the ...
    Rule Medium Severity
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  • Ensure /dev/shm is configured

    The <code>/dev/shm</code> is a traditional shared memory concept. One program will create a memory portion, which other processes (if permitted) ca...
    Rule Low Severity
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  • Uninstall python3-abrt-addon Package

    The python3-abrt-addon package can be removed with the following command: 
    $ sudo yum erase python3-abrt-addon
    Rule Low Severity
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  • Ensure PAM Displays Last Logon/Access Notification

    To configure the system to notify users of last logon/access using <code>pam_lastlog</code>, add or correct the <code>pam_lastlog</code> settings i...
    Rule Low Severity
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  • Lock Accounts After Failed Password Attempts

    This rule configures the system to lock out accounts after a number of incorrect login attempts using <code>pam_faillock.so</code>. pam_faillock.so...
    Rule Medium Severity
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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.

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