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Protection Profile for General Purpose Operating Systems

Rules and Groups employed by this XCCDF Profile

  • Disable GSSAPI Authentication

    Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like GSSAPI. <br> The default SSH configuration disallows authentications based on GSSAPI. The appropriate c...
    Rule Medium Severity
  • Disable Kerberos Authentication

    Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like Kerberos. <br> The default SSH configuration disallows authentication validation through Kerberos. The ...
    Rule Medium Severity
  • Disable SSH Root Login

    The root user should never be allowed to login to a system directly over a network. To disable root login via SSH, add or correct the following line in <code>/etc/ssh/sshd_config</code>: <pre>Pe...
    Rule Medium Severity
  • Enable Use of Strict Mode Checking

    SSHs <code>StrictModes</code> option checks file and ownership permissions in the user's home directory <code>.ssh</code> folder before accepting login. If world- writable permissions are found, lo...
    Rule Medium Severity
  • Enable SSH Warning Banner

    To enable the warning banner and ensure it is consistent across the system, add or correct the following line in <code>/etc/ssh/sshd_config</code>: <pre>Banner /etc/issue</pre> Another section c...
    Rule Medium Severity
  • Force frequent session key renegotiation

    The <code>RekeyLimit</code> parameter specifies how often the session key of the is renegotiated, both in terms of amount of data that may be transmitted and the time elapsed.<br> To decrease the d...
    Rule Medium Severity
  • SSH server uses strong entropy to seed

    To set up SSH server to use entropy from a high-quality source, edit the <code>/etc/sysconfig/sshd</code> file. The <code>SSH_USE_STRONG_RNG</code> configuration value determines how many bytes of ...
    Rule Low Severity
  • USBGuard daemon

    The USBGuard daemon enforces the USB device authorization policy for all USB devices.
    Group
  • Install usbguard Package

    The usbguard package can be installed with the following command:
    $ sudo yum install usbguard
    Rule Medium Severity
  • Enable the USBGuard Service

    The USBGuard service should be enabled. The usbguard service can be enabled with the following command:
    $ sudo systemctl enable usbguard.service
    Rule Medium Severity
  • Log USBGuard daemon audit events using Linux Audit

    To configure USBGuard daemon to log via Linux Audit (as opposed directly to a file), <code>AuditBackend</code> option in <code>/etc/usbguard/usbguard-daemon.conf</code> needs to be set to <code>Lin...
    Rule Low Severity
  • Authorize Human Interface Devices and USB hubs in USBGuard daemon

    To allow authorization of USB devices combining human interface device and hub capabilities by USBGuard daemon, add the line <code>allow with-interface match-all { 03:*:* 09:00:* }</code> to <code>...
    Rule Medium Severity

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