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Guide to the Secure Configuration of Oracle Linux 8

Rules, Groups, and Values defined within the XCCDF Benchmark

  • System and Software Integrity

    System and software integrity can be gained by installing antivirus, increasing system encryption strength with FIPS, verifying installed software,...
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  • System Settings

    Contains rules that check correct system settings.
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  • Installing and Maintaining Software

    The following sections contain information on security-relevant choices during the initial operating system installation process and the setup of s...
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  • Prefer to use a 64-bit Operating System when supported

    Prefer installation of 64-bit operating systems when the CPU supports it.
    Rule Medium Severity
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  • Software Integrity Checking

    Both the AIDE (Advanced Intrusion Detection Environment) software and the RPM package management system provide mechanisms for verifying the integr...
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  • Integrity Scan Notification Email Address

    Specify the email address for designated personnel if baseline configurations are changed in an unauthorized manner.
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  • Verify Integrity with RPM

    The RPM package management system includes the ability to verify the integrity of installed packages by comparing the installed files with informat...
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  • faillock directory

    The directory where the user files with the failure records are kept
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  • fail_interval

    Interval for counting failed login attempts before account lockout
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  • Restrict File and Directory Access

    Minimize access to critical httpd files and directories.
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  • Configure GnuTLS library to use DoD-approved TLS Encryption

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. GnuTLS is supported by system crypto policy, but the G...
    Rule Medium Severity
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  • Federal Information Processing Standard (FIPS)

    The Federal Information Processing Standard (FIPS) is a computer security standard which is developed by the U.S. Government and industry working g...
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  • Verify Integrity with AIDE

    AIDE conducts integrity checks by comparing information about files with previously-gathered information. Ideally, the AIDE database is created imm...
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  • Install AIDE

    The aide package can be installed with the following command: 
    $ sudo yum install aide
    Rule Medium Severity
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  • Build and Test AIDE Database

    Run the following command to generate a new database: <pre>$ sudo /usr/sbin/aide --init</pre> By default, the database will be written to the fil...
    Rule Medium Severity
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  • Configure AIDE to Verify the Audit Tools

    The operating system file integrity tool must be configured to protect the integrity of the audit tools.
    Rule Medium Severity
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  • Configure Periodic Execution of AIDE

    At a minimum, AIDE should be configured to run a weekly scan. To implement a daily execution of AIDE at 4:05am using cron, add the following line t...
    Rule Medium Severity
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  • Enable Dracut FIPS Module

    To enable FIPS mode, run the following command: <pre>fips-mode-setup --enable</pre> To enable FIPS, the system requires that the <code>fips</code> ...
    Rule High Severity
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  • Configure Notification of Post-AIDE Scan Details

    AIDE should notify appropriate personnel of the details of a scan after the scan has been run. If AIDE has already been configured for periodic exe...
    Rule Medium Severity
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  • Configure AIDE to Use FIPS 140-2 for Validating Hashes

    By default, the <code>sha512</code> option is added to the <code>NORMAL</code> ruleset in AIDE. If using a custom ruleset or the <code>sha512</code...
    Rule Medium Severity
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  • Configure AIDE to Verify Access Control Lists (ACLs)

    By default, the <code>acl</code> option is added to the <code>FIPSR</code> ruleset in AIDE. If using a custom ruleset or the <code>acl</code> optio...
    Rule Low Severity
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  • Configure AIDE to Verify Extended Attributes

    By default, the <code>xattrs</code> option is added to the <code>FIPSR</code> ruleset in AIDE. If using a custom ruleset or the <code>xattrs</code>...
    Rule Low Severity
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  • Audit Tools Must Be Group-owned by Root

    Oracle Linux 8 systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing ...
    Rule Medium Severity
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  • Audit Tools Must Be Owned by Root

    Oracle Linux 8 systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing ...
    Rule Medium Severity
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  • Audit Tools Must Have a Mode of 0755 or Less Permissive

    Oracle Linux 8 systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing ...
    Rule Medium Severity
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  • Enable FIPS Mode

    To enable FIPS mode, run the following command: <pre>fips-mode-setup --enable</pre> <br> The <code>fips-mode-setup</code> command will configure t...
    Rule High Severity
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  • Ensure '/etc/system-fips' exists

    On a system where FIPS mode is enabled, <code>/etc/system-fips</code> must exist. To enable FIPS mode, run the following command: <pre>fips-mode-se...
    Rule High Severity
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  • Set kernel parameter 'crypto.fips_enabled' to 1

    System running in FIPS mode is indicated by kernel parameter <code>'crypto.fips_enabled'</code>. This parameter should be set to <code>1</code> in ...
    Rule High Severity
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  • System Cryptographic Policies

    Linux has the capability to centrally configure cryptographic polices. The command <code>update-crypto-policies</code> is used to set the policy ap...
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  • SSH client RekeyLimit - size

    Specify the size component of the rekey limit. This limit signifies amount of data. After this amount of data is transferred through the connection...
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  • SSH client RekeyLimit - time

    Specify the time component of the rekey limit. The session key is renegotiated after the defined amount of time passes. The number is followed by u...
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  • The system-provided crypto policies

    Specify the crypto policy for the system.
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  • Install crypto-policies package

    The crypto-policies package can be installed with the following command: 
    $ sudo yum install crypto-policies
    Rule Medium Severity
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  • Configure BIND to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. BIND is supported by crypto policy, but the BIND confi...
    Rule High Severity
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  • Configure System Cryptography Policy

    To configure the system cryptography policy to use ciphers only from the <code><xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_system_...
    Rule High Severity
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  • Configure Kerberos to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. Kerberos is supported by crypto policy, but it's confi...
    Rule High Severity
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  • Configure Libreswan to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. Libreswan is supported by system crypto policy, but th...
    Rule High Severity
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  • Configure OpenSSL library to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. OpenSSL is supported by crypto policy, but the OpenSSL...
    Rule Medium Severity
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  • Configure OpenSSL library to use TLS Encryption

    Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSL. OpenSSL is by default configured...
    Rule Medium Severity
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  • Configure SSH to use System Crypto Policy

    Crypto Policies provide a centralized control over crypto algorithms usage of many packages. SSH is supported by crypto policy, but the SSH configu...
    Rule Medium Severity
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  • Harden SSH client Crypto Policy

    Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSH client. To override the system wi...
    Rule Medium Severity
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  • Configure SSH Client to Use FIPS 140-2 Validated Ciphers: 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 High Severity
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  • Configure SSH Server to Use FIPS 140-2 Validated Ciphers: 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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  • Harden SSHD Crypto Policy

    Crypto Policies are means of enforcing certain cryptographic settings for selected applications including OpenSSH server. The SSHD service is by de...
    Rule Medium Severity
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  • OpenSSL uses strong entropy source

    By default, OpenSSL doesn't always use a SP800-90A compliant random number generator. A way to configure OpenSSL to always use a strong source is t...
    Rule Medium Severity
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  • Operating System Vendor Support and Certification

    The assurance of a vendor to provide operating system support and maintenance for their product is an important criterion to ensure product stabili...
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  • The Installed Operating System Is FIPS 140-2 Certified

    To enable processing of sensitive information the operating system must provide certified cryptographic modules compliant with FIPS 140-2 standard.
    Rule High Severity
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  • The Installed Operating System Is Vendor Supported

    The installed operating system must be maintained by a vendor. Oracle Linux is supported by Oracle Corporation. As the Oracle Linux vendor, Oracle...
    Rule High Severity
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  • Endpoint Protection Software

    Endpoint protection security software that is not provided or supported by Oracle Corporation can be installed to provide complementary or duplica...
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  • Configure Backups of User Data

    The operating system must conduct backups of user data contained in the operating system. The operating system provides utilities for automating ba...
    Rule Medium Severity
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