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Guide to the Secure Configuration of Ubuntu 22.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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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  • System Settings

    Contains rules that check correct system settings.
    Group
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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...
    Group
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  • System and Software Integrity

    System and software integrity can be gained by installing antivirus, increasing system encryption strength with FIPS, verifying installed software,...
    Group
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  • Package "prelink" Must not be Installed

    The prelink package can be removed with the following command: 
     $ apt-get remove prelink
    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...
    Group
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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.
    Value
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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...
    Group
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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...
    Group
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  • Install AIDE

    The aide package can be installed with the following command: 
    $ apt-get install aide
    Rule Medium Severity
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  • SNMP read-write community string

    Specify the SNMP community string used for read-write access.
    Value
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  • McAfee Endpoint Security for Linux (ENSL)

    McAfee Endpoint Security for Linux (ENSL) is a suite of software applications used to monitor, detect, and defend computer networks and systems.
    Group
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  • GNOME Media Settings

    GNOME media settings that apply to the graphical interface.
    Group
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  • The percentage remaining in disk space before prompting admin_space_left_action

    The setting for admin_space_left as a percentage in /etc/audit/auditd.conf
    Value
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  • Build and Test AIDE Database

    Run the following command to generate a new database: <pre>$ sudo aideinit</pre> By default, the database will be written to the file <code>/var...
    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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  • 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...
    Group
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  • Verify '/proc/sys/crypto/fips_enabled' exists

    On a system where FIPS 140-2 mode is enabled, <code>/proc/sys/crypto/fips_enabled</code> must exist. To verify FIPS mode, run the following command...
    Rule High Severity
    Show

  • ucredit

    Minimum number of upper case in password
    Value
    Show

  • 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...
    Group
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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...
    Value
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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...
    Value
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  • The system-provided crypto policies

    Specify the crypto policy for the system.
    Value
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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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  • 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...
    Group
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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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  • Endpoint Protection Software

    Endpoint protection security software that is not provided or supported by Red Hat can be installed to provide complementary or duplicative secur...
    Group
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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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  • McAfee Endpoint Security Software

    In DoD environments, McAfee Host-based Security System (HBSS) and VirusScan Enterprise for Linux (VSEL) is required to be installed on all systems.
    Group
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  • The age of McAfee defintion file before requiring updating

    Specify the amount of time (in seconds) before McAfee definition files need to be updated.
    Value
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  • Install McAfee Endpoint Security for Linux (ENSL)

    Install McAfee Endpoint Security for Linux antivirus software which is provided for DoD systems and uses signatures to search for the presence of v...
    Rule Medium Severity
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  • McAfee Host-Based Intrusion Detection Software (HBSS)

    McAfee Host-based Security System (HBSS) is a suite of software applications used to monitor, detect, and defend computer networks and systems.
    Group
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  • Install the Host Intrusion Prevention System (HIPS) Module

    Install the McAfee Host Intrusion Prevention System (HIPS) Module if it is absolutely necessary. If SELinux is enabled, do not install or enable th...
    Rule Medium Severity
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  • Disk Partitioning

    To ensure separation and protection of data, there are top-level system directories which should be placed on their own physical partition or logic...
    Group
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  • Encrypt Partitions

    Ubuntu 22.04 natively supports partition encryption through the Linux Unified Key Setup-on-disk-format (LUKS) technology. The easiest way to encryp...
    Rule High Severity
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  • Ensure /home Located On Separate Partition

    If user home directories will be stored locally, create a separate partition for <code>/home</code> at installation time (or migrate it later using...
    Rule Low Severity
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  • Ensure /srv Located On Separate Partition

    If a file server (FTP, TFTP...) is hosted locally, create a separate partition for <code>/srv</code> at installation time (or migrate it later usin...
    Rule Unknown Severity
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  • Ensure /tmp Located On Separate Partition

    The <code>/tmp</code> directory is a world-writable directory used for temporary file storage. Ensure it has its own partition or logical volume at...
    Rule Low Severity
    Show

  • Ensure /var Located On Separate Partition

    The <code>/var</code> directory is used by daemons and other system services to store frequently-changing data. Ensure that <code>/var</code> has i...
    Rule Low Severity
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  • Ensure /var/log Located On Separate Partition

    System logs are stored in the <code>/var/log</code> directory. Ensure that <code>/var/log</code> has its own partition or logical volume at instal...
    Rule Low Severity
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  • Ensure /var/log/audit Located On Separate Partition

    Audit logs are stored in the <code>/var/log/audit</code> directory. Ensure that <code>/var/log/audit</code> has its own partition or logical volum...
    Rule Low Severity
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  • Ensure /var/tmp Located On Separate Partition

    The <code>/var/tmp</code> directory is a world-writable directory used for temporary file storage. Ensure it has its own partition or logical volum...
    Rule Medium Severity
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  • GNOME Desktop Environment

    GNOME is a graphical desktop environment bundled with many Linux distributions that allow users to easily interact with the operating system graphi...
    Group
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  • Remove the GDM Package Group

    By removing the <code>gdm3</code> package, the system no longer has GNOME installed installed. If X Windows is not installed then the system cann...
    Rule Medium Severity
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  • Configure GNOME3 DConf User Profile

    By default, DConf provides a standard user profile. This profile contains a list of DConf configuration databases. The user profile and database al...
    Rule High Severity
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  • Configure GNOME Login Screen

    In the default GNOME desktop, the login is displayed after system boot and can display user accounts, allow users to reboot the system, and allow u...
    Group
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  • Disable the GNOME3 Login User List

    In the default graphical environment, users logging directly into the system are greeted with a login screen that displays all known users. This fu...
    Rule Medium Severity
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  • Disable XDMCP in GDM

    XDMCP is an unencrypted protocol, and therefore, presents a security risk, see e.g. <a href="https://help.gnome.org/admin/gdm/stable/security.html....
    Rule High Severity
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  • Disable GNOME3 Automounting

    The system's default desktop environment, GNOME3, will mount devices and removable media (such as DVDs, CDs and USB flash drives) whenever they are...
    Rule Medium Severity
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Node 2

siemur/test-space

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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