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Guide to the Secure Configuration of Oracle Linux 9

Rules, Groups, and Values defined within the XCCDF Benchmark

  • System Settings

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

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

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

    Specify the email address for designated personnel if baseline configurations are changed in an unauthorized manner.
    Value
  • 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
  • Configure OpenLDAP Server

    This section details some security-relevant settings for an OpenLDAP server.
    Group
  • Maximum login attempts delay

    Maximum time in seconds between fail login attempts before re-prompting.
    Value
  • Maximum concurrent login sessions

    Maximum number of concurrent sessions by a user
    Value
  • Configure NFS Clients

    The steps in this section are appropriate for systems which operate as NFS clients.
    Group
  • Maximum NTP or Chrony Poll

    The maximum NTP or Chrony poll interval number in seconds specified as a power of two.
    Value
  • number of days after a password expires until the account is permanently disabled

    The number of days to wait after a password expires, until the account will be permanently disabled.
    Value
  • Sudo - umask value

    Specify the sudo umask to use. The actual umask value that is used is the union of the user's umask and the sudo umask. The default sudo umask is 0...
    Value
  • Remote 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
  • Account Inactivity Timeout (seconds)

    In an interactive shell, the value is interpreted as the number of seconds to wait for input after issuing the primary prompt. Bash terminates afte...
    Value
  • Interactive users initialization files

    'A regular expression describing a list of file names for files that are sourced at login time for interactive users'
    Value
  • 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
  • Install AIDE

    The aide package can be installed with the following command:
    $ sudo yum install aide
    Rule Medium Severity
  • 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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